Statistics of problem solving ⭐

JAVA

SCHOOL

Name	Problem	Solution	Time Complexity	Space complexity
Addition of Two Numbers	https://practice.geeksforgeeks.org/problems/addition-of-two-numbers0812/1?page=1&difficulty[]=-2&sortBy=accuracy	Addition of Two Numbers	$not specified$	$not specified$
Addition of two square matrices	https://practice.geeksforgeeks.org/problems/addition-of-two-square-matrices4916/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Addition of two square matrices	$O(N^2)$	$O(1)$
Area of Rectangle, Right Angled Triangle and Circle	https://practice.geeksforgeeks.org/problems/area-of-rectange-right-angled-triangle-and-circle2600/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Area of Rectangle, Right Angled Triangle and Circle	$O(1)$	$O(1)$
Armstrong Numbers	https://practice.geeksforgeeks.org/problems/armstrong-numbers2727/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Armstrong Numbers	$O(1)$	$O(1)$
Arrays (Sum of array)	https://practice.geeksforgeeks.org/problems/c-arrays-sum-of-array-set-14805/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Arrays (Sum of array)	$not specified$	$not specified$
At least two greater elements	https://practice.geeksforgeeks.org/problems/at-least-two-greater-elements4625/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	At least two greater elements	$not specified$	$not specified$
Automorphic Number	https://practice.geeksforgeeks.org/problems/automorphic-number4721/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Automorphic Number	$O(1)$	$O(1)$
Average in a stream	https://practice.geeksforgeeks.org/problems/average4856/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Average in a stream	$not specified$	$not specified$
Binary representation	https://practice.geeksforgeeks.org/problems/binary-representation5003/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Binary representation	$O(N)$	$O(1)$
Check for Binary	https://practice.geeksforgeeks.org/problems/check-for-binary/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Check for Binary	$not specified$	$not specified$
Check String	https://practice.geeksforgeeks.org/problems/check-string1818/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Check String	$O(	S
C++ if-else (Decision Making)	https://practice.geeksforgeeks.org/problems/c-if-else-decision-making4138/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	C++ if-else (Decision Making)	$O(1)$	$O(1)$
C++ Input / Output	https://practice.geeksforgeeks.org/problems/c-input-output2432/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	C++ Input / Output	$O(1)$	$O(1)$
Combinational Logic	https://practice.geeksforgeeks.org/problems/combinational-logic1908/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Combinational Logic	$O(1)$	$O(1)$
Compete the skills	https://practice.geeksforgeeks.org/problems/compete-the-skills5807/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Compete the skills	$O(1)$	$O(1)$
Convert a list of characters into a String	https://practice.geeksforgeeks.org/problems/convert-a-list-of-characters-into-a-string5142/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Convert a list of characters into a String	$not specified$	$not specified$
Convert String to LowerCase	https://practice.geeksforgeeks.org/problems/java-convert-string-to-lowercase2313/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Convert String to LowerCase	$not specified$	$not specified$
C++ Operators (Relational)	Set 2	https://practice.geeksforgeeks.org/problems/c-operators-relational-set-21407/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	C++ Operators (Relational)	Set 2
Count Digits	https://practice.geeksforgeeks.org/problems/count-digits5716/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Count Digits	$O(LogN)$	$O(1)$
Count of camel case characters	https://practice.geeksforgeeks.org/problems/find-the-camel3348/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Count of camel case characters	$not specified$	$not specified$
Count of smaller elements	https://practice.geeksforgeeks.org/problems/count-of-smaller-elements5947/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Count of smaller elements	$not specified$	$not specified$
Count type of Characters	https://practice.geeksforgeeks.org/problems/count-type-of-characters3635/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Count type of Characters	$O(N)$	$O(1)$
C++ Strings	https://practice.geeksforgeeks.org/problems/c-strings4609/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	C++ Strings	$not specified$	$not specified$
C++ Switch Case Statement	https://practice.geeksforgeeks.org/problems/c-switch-case-statement5900/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	C++ Switch Case Statement	$O(1)$	$O(1)$
Delete alternate characters	https://practice.geeksforgeeks.org/problems/java-delete-alternate-characters4036/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Delete alternate characters	$not specified$	$not specified$
Determine focal length of a spherical mirror	https://practice.geeksforgeeks.org/problems/determine-focal-length-of-a-spherical-mirror5415/1?page=4&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Determine focal length of a spherical mirror	$O(1)$	$O(1)$
Diagonal sum	https://practice.geeksforgeeks.org/problems/diagonal-sum0158/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Diagonal sum	$O(N)$	$O(1)$
Display longest name	https://practice.geeksforgeeks.org/problems/display-longest-name0853/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Display longest name	$not specified$	$not specified$
Distance between 2 points	https://practice.geeksforgeeks.org/problems/distance-between-2-points3200/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Distance between 2 points	$O(1)$	$O(1)$
Even Odd Sum	https://practice.geeksforgeeks.org/problems/even-odd-sum5450/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Even Odd Sum	$O(N)$	$O(1)$
Extract the integers	https://practice.geeksforgeeks.org/problems/extract-the-integers4428/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Extract the integers	$O(N)$	$O(N)$
Fascinating Number	https://practice.geeksforgeeks.org/problems/fascinating-number3751/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Fascinating Number	$O(1)$	$O(1)$
Find difference between sum of diagonals	https://practice.geeksforgeeks.org/problems/find-difference-between-sum-of-diagonals1554/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Find difference between sum of diagonals	$O(N)$	$O(1)$
Find Index	https://practice.geeksforgeeks.org/problems/find-index4752/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Find Index	$not specified$	$not specified$
Find the median	https://practice.geeksforgeeks.org/problems/find-the-median0527/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Find the median	$O(N * LogN)$	$O(1)$
1s Complement	https://practice.geeksforgeeks.org/problems/1s-complement2819/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	1s Complement	$O(N)$	$O(N)$
Front-Back Transformation - copy	https://practice.geeksforgeeks.org/problems/front-back-transformation1659/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Front-Back Transformation - copy	$O(N)$	$O(N)$
Full Prime	https://practice.geeksforgeeks.org/problems/full-prime2659/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Full Prime	$O(LogN)$	$O(1)$
GCD of two numbers	https://practice.geeksforgeeks.org/problems/gcd-of-two-numbers3459/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	GCD of two numbers	$O(Log(Min(a, b)))$	$O(1)$
Greatest of three numbers	https://practice.geeksforgeeks.org/problems/greatest-of-three-numbers2520/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Greatest of three numbers	$O(1)$	$O(1)$
12 hour clock addition	https://practice.geeksforgeeks.org/problems/12-hour-clock-addition1206/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	12 hour clock addition	$not specified$	$not specified$
12 hour clock Multiplication	https://practice.geeksforgeeks.org/problems/12-hour-clock-multiplication4709/1?page=4&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	12 hour clock Multiplication	$O(1)$	$O(1)$
12 hour clock subtraction	https://practice.geeksforgeeks.org/problems/12-hour-clock-subtraction1708/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	12 hour clock subtraction	$not specified$	$not specified$
Identical Matrices	https://practice.geeksforgeeks.org/problems/identical-matrices1042/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Identical Matrices	$O(N^2)$	$O(1)$
if-else (Decision Making)	https://practice.geeksforgeeks.org/problems/java-if-else-decision-making0924/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	if-else (Decision Making)	$O(1)$	$O(1)$
Java Abstract keyword	https://practice.geeksforgeeks.org/problems/java-abstract-keyword/1?page=4&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Abstract keyword	$O(1)$	$O(1)$
Java Arrays	Set 1	https://practice.geeksforgeeks.org/problems/java-arrays-set-11354/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Java Arrays	Set 1
Java Basic Data Types	https://practice.geeksforgeeks.org/problems/java-basic-data-types0041/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Basic Data Types	$not specified$	$not specified$
Java Classes Introduction	https://practice.geeksforgeeks.org/problems/java-classes-introduction/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Classes Introduction	$not specified$	$not specified$
Java Hello World	https://practice.geeksforgeeks.org/problems/java-hello-world4004/1?page=1&difficulty[]=-2&sortBy=accuracy	Java Hello World	$not specified$	$not specified$
Java Inheritance	https://practice.geeksforgeeks.org/problems/java-inheritance/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Inheritance	$not specified$	$not specified$
Java Input/Output	https://practice.geeksforgeeks.org/problems/java-inputoutput0118/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Input/Output	$O(1)$	$O(1)$
Java loops	Set 1	https://practice.geeksforgeeks.org/problems/java-loops-set-11726/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java loops	Set 1
Java Operators(Relational)	Set - 2	https://practice.geeksforgeeks.org/problems/java-operatorsrelational-set-22338/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Operators(Relational)	Set - 2
Java Override	https://practice.geeksforgeeks.org/problems/java-override/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Override	$O(1)$	$O(1)$
Java Strings	Set 1	https://practice.geeksforgeeks.org/problems/java-strings-set-15112/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Java Strings	Set 1
Java Substring	https://practice.geeksforgeeks.org/problems/java-substring5058/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Java Substring	$not specified$	$not specified$
Java Switch Case statement	https://practice.geeksforgeeks.org/problems/java-switch-case-statement3529/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Java Switch Case statement	$O(1)$	$O(1)$
Lower case to upper case	https://practice.geeksforgeeks.org/problems/lower-case-to-upper-case3410/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Lower case to upper case	$not specified$	$not specified$
Mean	https://practice.geeksforgeeks.org/problems/mean0021/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Mean	$O(N)$	$O(1)$
Multiplication Table	https://practice.geeksforgeeks.org/problems/print-table0303/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Multiplication Table	$O(1)$	$O(1)$
Multiply Array	https://practice.geeksforgeeks.org/problems/multiply-array-1658312632/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Multiply Array	$O(N)$	$O(1)$
Multiply Matrices	https://practice.geeksforgeeks.org/problems/multiply-matrices/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Multiply Matrices	$not specified$	$not specified$
nPr	https://practice.geeksforgeeks.org/problems/npr4253/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	nPr	$O(N)$	$O(N)$
Number Pattern	https://practice.geeksforgeeks.org/problems/number-pattern0517/1?page=4&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Number Pattern	$O(N^2)$	$O(N)$
Odd or Even	https://practice.geeksforgeeks.org/problems/odd-or-even3618/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Odd or Even	$not specified$	$not specified$
Palindrome	https://practice.geeksforgeeks.org/problems/palindrome0746/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Palindrome	$O(N)$	$O(N)$
Palindromic Array	https://practice.geeksforgeeks.org/problems/palindromic-array-1587115620/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Palindromic Array	$not specified$	$not specified$
Parallel or Perpendicular?	https://practice.geeksforgeeks.org/problems/parallel-or-perpendicular4257/1?page=4&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Parallel or Perpendicular?	$not specified$	$not specified$
Party of Couples	https://practice.geeksforgeeks.org/problems/alone-in-couple5507/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Party of Couples	$not specified$	$not specified$
Pattern of Strings	https://practice.geeksforgeeks.org/problems/pattern-of-strings3829/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Pattern of Strings	$O(N)$	$O(N)$
Pattern Printing	https://practice.geeksforgeeks.org/problems/pattern-printing1347/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Pattern Printing	$O(N)$	$O(1)$
Perfect Arrays	https://practice.geeksforgeeks.org/problems/perfect-arrays4645/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Perfect Arrays	$not specified$	$not specified$
Perfect Number	https://practice.geeksforgeeks.org/problems/perfect-number3759/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Perfect Number	$O(LogN * N)$	$O(1)$
Power of Pow	Even Number	https://practice.geeksforgeeks.org/problems/power-of-pow-even-number5440/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Power of Pow	Even Number
Power of Pow	Odd Numbers	https://practice.geeksforgeeks.org/problems/power-of-pow-odd-numbers1103/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Power of Pow	Odd Numbers
Print 1 To N Without Loop	https://practice.geeksforgeeks.org/problems/print-1-to-n-without-using-loops-1587115620/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Print 1 To N Without Loop	$O(N)$	$O(N)$
Print 1 to n without using loops	https://practice.geeksforgeeks.org/problems/print-1-to-n-without-using-loops3621/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Print 1 to n without using loops	$O(N)$	$O(N)$
Print alternate elements of an array	https://practice.geeksforgeeks.org/problems/print-alternate-elements-of-an-array/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Print alternate elements of an array	$not specified$	$not specified$
Print Elements of Array	https://practice.geeksforgeeks.org/problems/print-elements-of-array4910/1?utm_source=geeksforgeeks&utm_medium=ml_article_practice_tab&utm_campaign=article_practice_tab	Print Elements of Array	$not specified$	$not specified$
Print the left element	https://practice.geeksforgeeks.org/problems/print-the-left-element2009/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Print the left element	$not specified$	$not specified$
Program to print reciprocal of letters	https://practice.geeksforgeeks.org/problems/program-to-print-reciprocal-of-letters36233623/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Program to print reciprocal of letters	$O(N)$	$O(N)$
Remainder Evaluation	https://practice.geeksforgeeks.org/problems/remainder-evaluation3755/1?page=1&difficulty[]=-2&sortBy=accuracy	Remainder Evaluation	$not specified$	$not specified$
Remove characters from alphanumeric string	https://practice.geeksforgeeks.org/problems/remove-characters-from-alphanumeric-string0648/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Remove characters from alphanumeric string	$not specified$	$not specified$
Remove Spaces	https://practice.geeksforgeeks.org/problems/remove-spaces0128/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Remove Spaces	$not specified$	$not specified$
Remove vowels from string	https://practice.geeksforgeeks.org/problems/remove-vowels-from-string1446/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Remove vowels from string	$not specified$	$not specified$
Reverse a String	https://practice.geeksforgeeks.org/problems/java-reverse-a-string0416/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Reverse a String	$not specified$	$not specified$
Reverse digits	https://practice.geeksforgeeks.org/problems/reverse-digit0316/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Reverse digits	$O(LogN)$	$O(1)$
Reversing the vowels	https://practice.geeksforgeeks.org/problems/reversing-the-vowels5304/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Reversing the vowels	$not specified$	$not specified$
Series AP	https://practice.geeksforgeeks.org/problems/series-ap5310/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Series AP	$O(1)$	$O(1)$
Simple Interest	https://practice.geeksforgeeks.org/problems/simple-interest3457/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Simple Interest	$O(1)$	$O(1)$
Smaller and Larger	https://practice.geeksforgeeks.org/problems/smaller-and-larger4005/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Smaller and Larger	$not specified$	$not specified$
Small Factorial	https://practice.geeksforgeeks.org/problems/small-factorial0854/1?page=2&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Small Factorial	$O(N)$	$O(1)$
Split Strings	https://practice.geeksforgeeks.org/problems/split-strings5211/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Split Strings	$O(N)$	$O(N)$
Sum of an AP	https://practice.geeksforgeeks.org/problems/sum-of-an-ap1025/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Sum of an AP	$O(N)$	$O(1)$
Sum of Array	https://practice.geeksforgeeks.org/problems/sum-of-array2326/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Sum of Array	$not specified$	$not specified$
Sum of Array Elements	https://practice.geeksforgeeks.org/problems/sum-of-array-elements2502/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Sum of Array Elements	$not specified$	$not specified$
Sum of Digit is Pallindrome or not	https://practice.geeksforgeeks.org/problems/sum-of-digit-is-pallindrome-or-not2751/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Sum of Digit is Pallindrome or not	$O(LogN)$	$O(LogN)$
Sum Of Digits	https://practice.geeksforgeeks.org/problems/sum-of-digits1742/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Sum Of Digits	$O(LogN)$	$O(1)$
Sum of elements in a matrix	https://practice.geeksforgeeks.org/problems/sum-of-elements-in-a-matrix2000/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Sum of elements in a matrix	$not specified$	$not specified$
Sum of GP	https://practice.geeksforgeeks.org/problems/sum-of-gp2120/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Sum of GP	$O(N)$	$O(1)$
Sum of odd and even elements	https://practice.geeksforgeeks.org/problems/sum-of-odd-and-even-elements3033/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Sum of odd and even elements	$O(N)$	$O(1)$
Sum of Series	https://practice.geeksforgeeks.org/problems/sum-of-series2811/1?page=1&difficulty	Sum of Series	$not specified$	$not specified$
Surface Area and Volume of Cuboid	https://practice.geeksforgeeks.org/problems/surface-area-and-volume-of-cuboid0522/1?page=3&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Surface Area and Volume of Cuboid	$not specified$	$not specified$
Swap kth elements	https://practice.geeksforgeeks.org/problems/swap-kth-elements5500/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Swap kth elements	$not specified$	$not specified$
Swap two numbers	https://practice.geeksforgeeks.org/problems/swap-two-numbers3844/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Swap two numbers	$not specified$	$not specified$
The dice problem	https://practice.geeksforgeeks.org/problems/the-dice-problem2316/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	The dice problem	$O(1)$	$O(1)$
Triangle shrinking downwards	https://practice.geeksforgeeks.org/problems/triangle-shrinking-downwards0459/1?page=3&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Triangle shrinking downwards	$O(N^2)$	$O(N)$
Upper case conversion	https://practice.geeksforgeeks.org/problems/upper-case-conversion5419/1?page=2&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Upper case conversion	$not specified$	$not specified$
Value equal to index value	https://practice.geeksforgeeks.org/problems/value-equal-to-index-value1330/1?page=1&difficulty[]=-2&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Value equal to index value	$not specified$	$not specified$
Vowel or Not	https://practice.geeksforgeeks.org/problems/vowel-or-not0831/1?page=1&difficulty[]=-2&status[]=unsolved&status[]=attempted&sortBy=submissions	Vowel or Not	$O(1)$	$O(1)$

BASIC

Name	Problem	Solution	Time Complexity	Space complexity
Binary Search	https://practice.geeksforgeeks.org/problems/binary-search-1587115620/1?utm_source=gfg&utm_medium=article&utm_campaign=bottom_sticky_on_article	Binary Search	$O(LogN)$	$O(1)$
Bit Difference	https://practice.geeksforgeeks.org/problems/bit-difference-1587115620/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Bit Difference	$not specified$	$not specified$
Check If Circular Linked List	https://practice.geeksforgeeks.org/problems/circular-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Check If Circular Linked List	$O(N)$	$O(1)$
Count Leaves in Binary Tree	https://practice.geeksforgeeks.org/problems/count-leaves-in-binary-tree/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Count Leaves in Binary Tree	$O(N)$	$O(N)$
Count nodes of linked list	https://practice.geeksforgeeks.org/problems/count-nodes-of-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Count nodes of linked list	$O(N)$	$O(1)$
Count zeros in a sorted matrix	https://practice.geeksforgeeks.org/problems/count-zeros-in-a-sorted-matrix/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Count zeros in a sorted matrix	$O(N^2)$	$O(1)$
Delete Alternate Nodes	https://practice.geeksforgeeks.org/problems/delete-alternate-nodes/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Delete Alternate Nodes	$not specified$	$not specified$
Delete node in Doubly Linked List	https://practice.geeksforgeeks.org/problems/delete-node-in-doubly-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Delete node in Doubly Linked List	$not specified$	$not specified$
Find minimum and maximum element in an array	https://practice.geeksforgeeks.org/problems/find-minimum-and-maximum-element-in-an-array4428/1?page=1&difficulty[]=-1&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Find minimum and maximum element in an array	$O(N)$	$O(1)$
Find n/k th node in Linked list	https://practice.geeksforgeeks.org/problems/find-nk-th-node-in-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Find n/k th node in Linked list	$not specified$	$not specified$
Find the Sum of Last N nodes of the Linked List	https://practice.geeksforgeeks.org/problems/find-the-sum-of-last-n-nodes-of-the-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Find the Sum of Last N nodes of the Linked List	$O(N)$	$O(1)$
Game with nos	https://practice.geeksforgeeks.org/problems/game-with-nos3123/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Game with nos	$O(N)$	$O(N)$
Identical Linked Lists	https://practice.geeksforgeeks.org/problems/identical-linked-lists/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Identical Linked Lists	$not specified$	$not specified$
Immediate Smaller Element	https://practice.geeksforgeeks.org/problems/immediate-smaller-element1142/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Stack&sortBy=accuracy	Immediate Smaller Element	$O(N)$	$O(1)$
Implement Queue using array	https://practice.geeksforgeeks.org/problems/implement-queue-using-array/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Queue&sortBy=accuracy	Implement Queue using array	$not specified$	$not specified$
Implement Queue using Linked List	https://practice.geeksforgeeks.org/problems/implement-queue-using-linked-list	Implement Queue using Linked List	$not specified$	$not specified$
Implement stack using array	https://practice.geeksforgeeks.org/problems/implement-stack-using-array/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Stack&sortBy=accuracy	Implement stack using array	$not specified$	$not specified$
Implement Stack using Linked List	https://practice.geeksforgeeks.org/problems/implement-stack-using-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Implement Stack using Linked List	$not specified$	$not specified$
Insert in Middle of Linked List	https://practice.geeksforgeeks.org/problems/insert-in-middle-of-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Insert in Middle of Linked List	$not specified$	$not specified$
Java Generic Class	https://practice.geeksforgeeks.org/problems/java-generic-class/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Java Generic Class	$not specified$	$not specified$
Linked List Insertion	https://practice.geeksforgeeks.org/problems/linked-list-insertion-1587115620/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Linked List Insertion	$not specified$	$not specified$
Linked List Length Even or Odd?	https://practice.geeksforgeeks.org/problems/linked-list-length-even-or-odd/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Linked List Length Even or Odd?	$O(N)$	$O(1)$
Magical String[Duplicate Problem]	https://practice.geeksforgeeks.org/problems/magical-string3653/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Magical String[Duplicate Problem]	$O(N)$	$O(N)$
Matching Pair	https://practice.geeksforgeeks.org/problems/matching-pair5320/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Matching Pair	$not specified$	$not specified$
Midori and chocolates	https://practice.geeksforgeeks.org/problems/midori-and-chocolates2438/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Midori and chocolates	$O(1)$	$O(1)$
Minimum element in BST	https://www.geeksforgeeks.org/problems/minimum-element-in-bst/1?page=1&category=Tree&difficulty=Basic&status=unsolved&sortBy=submissions	Minimum element in BST	$O(N)$	$O(N)$
Modular Node	https://practice.geeksforgeeks.org/problems/modular-node/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Modular Node	$not specified$	$not specified$
Node at a given index in linked list	https://practice.geeksforgeeks.org/problems/node-at-a-given-index-in-linked-list/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Node at a given index in linked list	$O(N)$	$O(1)$
Pairwise Consecutive Elements	https://practice.geeksforgeeks.org/problems/pairwise-consecutive-elements/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Stack&sortBy=accuracy	Pairwise Consecutive Elements	$not specified$	$not specified$
Pattern 13	https://practice.geeksforgeeks.org/problems/triangle-pattern-1661718712/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Pattern 13	$not specified$	$not specified$
Play With OR	https://practice.geeksforgeeks.org/problems/play-with-or5515/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Play With OR	$not specified$	$not specified$
Postorder Traversal	https://practice.geeksforgeeks.org/problems/postorder-traversal/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Postorder Traversal	$not specified$	$not specified$
Preorder Traversal	https://practice.geeksforgeeks.org/problems/preorder-traversal/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Stack&sortBy=accuracy	Preorder Traversal	$not specified$	$not specified$
Print first letter of every word in the string	https://practice.geeksforgeeks.org/problems/print-first-letter-of-every-word-in-the-string3632/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Print first letter of every word in the string	$not specified$	$not specified$
Print Linked List elements	https://practice.geeksforgeeks.org/problems/print-linked-list-elements/1?page=1&difficulty[]=-1&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Print Linked List elements	$not specified$	$not specified$
Queue Push & Pop	https://practice.geeksforgeeks.org/problems/queue-designer/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Queue Push & Pop	$not specified$	$not specified$
Queue Reversal	https://practice.geeksforgeeks.org/problems/queue-reversal/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Queue Reversal	$O(N)$	$O(N)$
Red OR Green	https://practice.geeksforgeeks.org/problems/red-or-green5711/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Red OR Green	$not specified$	$not specified$
Reverse a String	https://practice.geeksforgeeks.org/problems/reverse-a-string/1?page=1&difficulty[]=-1&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Reverse a String	$not specified$	$not specified$
Searching a number	https://practice.geeksforgeeks.org/problems/searching-a-number0324/1?utm_source=gfg&utm_medium=article&utm_campaign=bottom_sticky_on_article	Searching a number	$not specified$	$not specified$
Set kth bit	https://practice.geeksforgeeks.org/problems/set-kth-bit3724/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Set kth bit	$not specified$	$not specified$
Size of Binary Tree	https://practice.geeksforgeeks.org/problems/size-of-binary-tree/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Size of Binary Tree	$not specified$	$not specified$
Stack designer	https://practice.geeksforgeeks.org/problems/stack-designer/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Stack designer	$not specified$	$not specified$
Sum of Binary Tree	https://practice.geeksforgeeks.org/problems/sum-of-binary-tree/1?page=1&difficulty[]=-1&status[]=unsolved&sortBy=accuracy	Sum of Binary Tree	$O(N)$	$O(N)$
Union of two arrays	https://practice.geeksforgeeks.org/problems/union-of-two-arrays3538/1?page=1&difficulty[]=-1&category[]=Data%20Structures&category[]=Arrays&sortBy=submissions	Union of two arrays	$O(N + M)$	$O(N + M)$

EASY

Name	Problem	Solution	Time Complexity	Space complexity
BigInteger Multiply	https://practice.geeksforgeeks.org/problems/biginteger-multiply/1?page=1&status[]=unsolved&sortBy=accuracy	BigInteger Multiply	$not specified$	$not specified$
Binary matrix having maximum number of 1s	https://practice.geeksforgeeks.org/problems/binary-matrix-having-maximum-number-of-1s--170647/1?page=1&category=Binary%20Search&difficulty=School,Basic,Easy&status=unsolved&sortBy=accuracy	Binary matrix having maximum number of 1s	$not specified$	$not specified$
Common elements	https://practice.geeksforgeeks.org/problems/common-elements1132/1?utm_source=gfg&utm_medium=article&utm_campaign=bottom_sticky_on_article	Common elements	$O(N)$	$O(N)$
Delete without head pointer	https://practice.geeksforgeeks.org/problems/delete-without-head-pointer/1?page=1&difficulty[]=-2&difficulty[]=-1&difficulty[]=0&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Delete without head pointer	$not specified$	$not specified$
Deque Implementations	https://practice.geeksforgeeks.org/problems/deque-implementations/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Deque Implementations	$not specified$	$not specified$
Equilibrium Point	https://practice.geeksforgeeks.org/problems/equilibrium-point-1587115620/1?utm_source=gfg&utm_medium=article&utm_campaign=bottom_sticky_on_article	Equilibrium Point	$O(N)$	$O(1)$
Find the Highest number	https://practice.geeksforgeeks.org/problems/find-the-highest-number2259/1?page=1&category=Binary%20Search&difficulty=School,Basic,Easy&status=unsolved&sortBy=accuracy	Find the Highest number	$not specified$	$not specified$
First negative integer in every window of size k	https://practice.geeksforgeeks.org/problems/first-negative-integer-in-every-window-of-size-k3345/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	First negative integer in every window of size k	$not specified$	$not specified$
Generate Binary Numbers	https://practice.geeksforgeeks.org/problems/generate-binary-numbers-1587115620/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Generate Binary Numbers	$O(N * LogN)$	$O(1)$
Insert an Element at the Bottom of a Stack	https://practice.geeksforgeeks.org/problems/insert-an-element-at-the-bottom-of-a-stack/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Stack&sortBy=accuracy	Insert an Element at the Bottom of a Stack	$not specified$	$not specified$
Leaders in an array	https://practice.geeksforgeeks.org/problems/leaders-in-an-array-1587115620/1?utm_source=gfg&utm_medium=article&utm_campaign=bottom_sticky_on_article	Leaders in an array	$O(N)$	$O(1)$
Maximum Diamonds	https://practice.geeksforgeeks.org/problems/chinky-and-diamonds3340/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Maximum Diamonds	$not specified$	$not specified$
Max Level Sum in Binary Tree	https://practice.geeksforgeeks.org/problems/max-level-sum-in-binary-tree--170647/1?page=1&category=Binary%20Search&difficulty=School,Basic,Easy&status=unsolved&sortBy=accuracy	Max Level Sum in Binary Tree	$not specified$	$not specified$
Minimum Cost of ropes	https://practice.geeksforgeeks.org/problems/minimum-cost-of-ropes-1587115620/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Minimum Cost of ropes	$not specified$	$not specified$
Min sum formed by digits	https://www.geeksforgeeks.org/problems/min-sum-formed-by-digits3551/1?page=1&category=Queue&difficulty=Easy&status=unsolved&sortBy=accuracy	Min sum formed by digits	$O(N)$	$O(N * LogN)$
Next Right Node	https://www.geeksforgeeks.org/problems/next-right-node/1?page=1&category=Queue&difficulty=Easy&status=unsolved&sortBy=accuracy	Next Right Node	$O(N)$	$O(N)$
Occurence of an integer in a Linked List	https://practice.geeksforgeeks.org/problems/occurence-of-an-integer-in-a-linked-list/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Occurence of an integer in a Linked List	$not specified$	$not specified$
Operations on PriorityQueue	https://practice.geeksforgeeks.org/problems/operations-on-priorityqueue/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Operations on PriorityQueue	$not specified$	$not specified$
Queue Operations	https://www.geeksforgeeks.org/problems/queue-operations/1?page=1&category=Queue&difficulty=Easy&status=unsolved&sortBy=accuracy	Queue Operations	$O(N)$	$O(N)$
Queue using stack	https://practice.geeksforgeeks.org/problems/queue-using-stack/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Queue using stack	$not specified$	$not specified$
Queue using two Stacks	https://practice.geeksforgeeks.org/problems/queue-using-two-stacks/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Queue using two Stacks	$not specified$	$not specified$
Reverse a linked list	https://practice.geeksforgeeks.org/problems/reverse-a-linked-list/1?page=1&difficulty[]=-2&difficulty[]=-1&difficulty[]=0&status[]=unsolved&category[]=Linked%20List&sortBy=accuracy	Reverse a linked list	$not specified$	$not specified$
Reverse First K elements of Queue	https://practice.geeksforgeeks.org/problems/reverse-first-k-elements-of-queue/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Reverse First K elements of Queue	$not specified$	$not specified$
Stack using two queues	https://practice.geeksforgeeks.org/problems/stack-using-two-queues/1?page=1&difficulty[]=0&status[]=unsolved&category[]=Queue&sortBy=accuracy	Stack using two queues	$not specified$	$not specified$
Ticket Counter	https://www.geeksforgeeks.org/problems/ticket-counter-2731/1?page=1&category=Queue&difficulty=Easy&status=unsolved&sortBy=accuracy	Ticket Counter	$O(N)$	$O(N)$

MEDIUM

Name	Problem	Solution	Time Complexity	Space complexity
Majority Element	https://practice.geeksforgeeks.org/problems/majority-element-1587115620/1?utm_source=geeksforgeeks&utm_medium=ml_article_practice_tab&utm_campaign=article_practice_tab	Majority Element	$O(N)$	$O(N)$