Whit - Paper #32
Open
Whit - Paper #32
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
CheezItMan
reviewed
Jan 10, 2022
Comment on lines
2
to
7
| def grouped_anagrams(strings): | ||
| """ This method will return an array of arrays. | ||
| Each subarray will have strings which are anagrams of each other | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Each subarray will have strings which are anagrams of each other. | ||
| Time Complexity: O(n^2) -- or is it O(n) bc of the "continue"s? | ||
| Space Complexity: O(n) | ||
| """ |
There was a problem hiding this comment.
👍 this works, but can you figure out a way to do this in O(n) time complexity using a dictionary?
Comment on lines
+37
to
+38
| freqs = __create_indexed_freq_map(nums) | ||
| reverse_freqs = __create_reverse_indexed_freq_map(freqs) |
Comment on lines
29
to
+33
| def top_k_frequent_elements(nums, k): | ||
| """ This method will return the k most common elements | ||
| In the case of a tie it will select the first occuring element. | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O(n x m), where n is length of original list and m is number of repeats for each repeated value | ||
| Space Complexity: O(n) |
There was a problem hiding this comment.
👍 Just note that you are sorting, what does that do to the time/space complexity?
Comment on lines
+91
to
+109
| if y < 3 and x < 3: | ||
| quadrants[0].append(board[i][j]) | ||
| elif y < 3 and 3 <= x and x < 6: | ||
| quadrants[1].append(board[i][j]) | ||
| elif y < 3 and 6 <= x: | ||
| quadrants[2].append(board[i][j]) | ||
| elif 3 <= y and y < 6 and x < 3: | ||
| quadrants[3].append(board[i][j]) | ||
| elif 3 <= y and y < 6 and 3 <= x and x < 6: | ||
| quadrants[4].append(board[i][j]) | ||
| elif 3 <= y and y < 6 and x >= 6: | ||
| quadrants[5].append(board[i][j]) | ||
| elif 6 <= y and x < 3: | ||
| quadrants[6].append(board[i][j]) | ||
| elif 6 <= y and 3 <= x and x < 6: | ||
| quadrants[7].append(board[i][j]) | ||
| elif 6 <= y and x >= 6: | ||
| quadrants[8].append(board[i][j]) | ||
|
|
There was a problem hiding this comment.
Could you do this with some kind of loop?
Comment on lines
+61
to
+68
| def valid_sudoku(board): | ||
| """ This method will return the true if the table is still | ||
| a valid sudoku table. | ||
| Each element can either be a ".", or a digit 1-9 | ||
| The same digit cannot appear twice or more in the same | ||
| row, column or 3x3 subgrid | ||
| Time Complexity: ? | ||
| Space Complexity: ? | ||
| Time Complexity: O(n^2) | ||
| Space Complexity: O(n) ? its a little complicated and im tired |
There was a problem hiding this comment.
Just a note that the time complexity is really O(1) since the size of the input never changes. The grid is always 9x9.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Hash Table Practice
Congratulations! You're submitting your assignment!
Comprehension Questions