diff --git a/src/BaekJoon/Dltmd202/10845/Main.java b/src/BaekJoon/Dltmd202/10845/Main.java
new file mode 100644
index 0000000..92ca57d
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/10845/Main.java
@@ -0,0 +1,48 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.LinkedList;
+import java.util.Queue;
+
+/**
+ * 큐
+ * https://www.acmicpc.net/problem/10845
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException {
+        int n = Integer.parseInt(br.readLine());
+        Queue<Integer> q = new LinkedList<>();
+
+        for (int i = 0; i < n; i++) {
+            String command = br.readLine();
+            if (command.startsWith("push")){
+                q.offer(Integer.parseInt(command.substring(5)));
+            } else {
+                if(command.equals("pop")){
+                    if(!q.isEmpty()) {
+                        sb.append(q.poll());
+                    } else {
+                        sb.append(-1);
+                    }
+                } else if(command.equals("size")){
+                    sb.append(q.size());
+                } else if(command.equals("empty")){
+                    sb.append(q.isEmpty() ? 1: 0);
+                } else if(command.equals("front")){
+                    if(!q.isEmpty()){
+                        sb.append(q.peek());
+                    } else {
+                        sb.append(-1);
+                    }
+                } else if(command.equals("back")){
+                    sb.append(q.stream().reduce((a, b) -> b).orElse(-1));
+                }
+                sb.append("\n");
+            }
+        }
+        System.out.println(sb.toString().trim());
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/10866/Main.java b/src/BaekJoon/Dltmd202/10866/Main.java
new file mode 100644
index 0000000..7032ef1
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/10866/Main.java
@@ -0,0 +1,44 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayDeque;
+import java.util.Deque;
+
+/**
+ * 덱
+ * https://www.acmicpc.net/problem/10866
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException {
+        int n = Integer.parseInt(br.readLine());
+        Deque<Integer> deque = new ArrayDeque<>();
+
+        for (int i = 0; i < n; i++) {
+            String command = br.readLine();
+            if (command.startsWith("push_back")){
+                deque.offerLast(Integer.parseInt(command.substring(10)));
+            } else if(command.startsWith("push_front")){
+                deque.offerFirst(Integer.parseInt(command.substring(11)));
+            } else {
+                if(command.equals("pop_front")){
+                    sb.append(deque.isEmpty() ? -1 : deque.pollFirst());
+                } else if(command.equals("pop_back")){
+                    sb.append(deque.isEmpty() ? -1 : deque.pollLast());
+                } else if(command.equals("size")){
+                    sb.append(deque.size());
+                } else if(command.equals("empty")){
+                    sb.append(deque.isEmpty() ? 1: 0);
+                } else if(command.equals("front")){
+                    sb.append(deque.isEmpty() ? -1 : deque.peekFirst());
+                } else if(command.equals("back")){
+                    sb.append(deque.isEmpty() ? -1 : deque.peekLast());
+                }
+                sb.append("\n");
+            }
+        }
+        System.out.println(sb.toString().trim());
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/10989/Main.java b/src/BaekJoon/Dltmd202/10989/Main.java
new file mode 100644
index 0000000..5662f90
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/10989/Main.java
@@ -0,0 +1,28 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+/**
+ * 수 정렬하기 3
+ * https://www.acmicpc.net/problem/10989
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException{
+        int n = Integer.parseInt(br.readLine());
+        int[] data = new int[n];
+
+        for (int i = 0; i < n; i++) {
+            data[i] = Integer.parseInt(br.readLine());
+        }
+        Arrays.sort(data);
+
+        for (int i = 0; i < n; i++) {
+            sb.append(data[i]).append("\n");
+        }
+        System.out.println(sb.toString().trim());
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/11050/Main.java b/src/BaekJoon/Dltmd202/11050/Main.java
new file mode 100644
index 0000000..0357cb2
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/11050/Main.java
@@ -0,0 +1,30 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.StringTokenizer;
+
+public class Main {
+    static StringBuilder sb = new StringBuilder();
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    /**
+     * 이항 계수 1
+     * https://www.acmicpc.net/problem/11050
+     */
+    public static void main(String[] args) throws IOException{
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        int n = Integer.parseInt(st.nextToken());
+        int k = Integer.parseInt(st.nextToken());
+        int[] factorial = new int[n + 1];
+
+        factorial[0] = 1;
+        factorial[1] = 1;
+        for (int i = 2; i <= n; i++) {
+            factorial[i] = factorial[i - 1] * i;
+        }
+
+        System.out.println(factorial[n] / (factorial[n - k] * factorial[k]));
+
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/11650/Main.java b/src/BaekJoon/Dltmd202/11650/Main.java
new file mode 100644
index 0000000..9162a7e
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/11650/Main.java
@@ -0,0 +1,58 @@
+import java.io.*;
+import java.util.*;
+import java.util.stream.*;
+
+/**
+ * 좌표 정렬하기1
+ * https://www.acmicpc.net/problem/11650
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException{
+        int n = Integer.parseInt(br.readLine());
+        Coordinate[] coordinates = new Coordinate[n];
+
+        for (int i = 0; i < n; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            coordinates[i] = new Coordinate(
+                    Integer.parseInt(st.nextToken()),
+                    Integer.parseInt(st.nextToken())
+            );
+        }
+
+        String answer = Arrays.stream(coordinates)
+                .sorted(Comparator.comparingInt(Coordinate::getX)
+                        .thenComparing(
+                                Comparator.comparing(Coordinate::getY)))
+                .map(String::valueOf)
+                .collect(Collectors.joining("\n"));
+
+        System.out.println(answer);
+    }
+
+
+    static class Coordinate{
+        int x;
+        int y;
+
+        public Coordinate(int x, int y){
+            this.y = y;
+            this.x = x;
+        }
+
+        public int getY(){
+            return y;
+        }
+
+        public int getX(){
+            return x;
+        }
+
+        @Override
+        public String toString(){
+            return x + " " + y;
+        }
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/11651/Main.java b/src/BaekJoon/Dltmd202/11651/Main.java
new file mode 100644
index 0000000..c11333e
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/11651/Main.java
@@ -0,0 +1,58 @@
+import java.io.*;
+import java.util.*;
+import java.util.stream.*;
+
+/**
+ * 좌표 정렬하기2
+ * https://www.acmicpc.net/problem/11651
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException{
+        int n = Integer.parseInt(br.readLine());
+        Coordinate[] coordinates = new Coordinate[n];
+
+        for (int i = 0; i < n; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            coordinates[i] = new Coordinate(
+                    Integer.parseInt(st.nextToken()),
+                    Integer.parseInt(st.nextToken())
+            );
+        }
+
+        String answer = Arrays.stream(coordinates)
+                .sorted(Comparator.comparingInt(Coordinate::getY)
+                        .thenComparing(
+                                Comparator.comparing(Coordinate::getX)))
+                .map(String::valueOf)
+                .collect(Collectors.joining("\n"));
+
+        System.out.println(answer);
+    }
+
+
+    static class Coordinate{
+        int x;
+        int y;
+
+        public Coordinate(int x, int y){
+            this.y = y;
+            this.x = x;
+        }
+
+        public int getY(){
+            return y;
+        }
+
+        public int getX(){
+            return x;
+        }
+
+        @Override
+        public String toString(){
+            return x + " " + y;
+        }
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/11866/Main.java b/src/BaekJoon/Dltmd202/11866/Main.java
new file mode 100644
index 0000000..d2cf9eb
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/11866/Main.java
@@ -0,0 +1,34 @@
+import java.util.*;
+import java.io.*;
+import java.util.stream.*;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();;
+
+    public static void main(String[] args) throws IOException{
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        int n = Integer.parseInt(st.nextToken());
+        int k = Integer.parseInt(st.nextToken());
+
+        List<Integer> q = IntStream.range(1, n + 1)
+                .boxed()
+                .collect(Collectors.toList());
+        List<Integer> answer = new ArrayList<>();
+
+        int idx = 0;
+        while (q.size() > 1){
+            idx = (idx + (k - 1)) % q.size();
+
+            answer.add(q.remove(idx));
+        }
+        answer.add(q.remove(0));
+
+        System.out.println(
+                answer.stream()
+                        .map(String::valueOf)
+                        .collect(Collectors.joining(", ", "<", ">"))
+        );
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/15829/Main.java b/src/BaekJoon/Dltmd202/15829/Main.java
new file mode 100644
index 0000000..091b709
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/15829/Main.java
@@ -0,0 +1,27 @@
+import java.io.*;
+
+/**
+ * Hashing
+ * https://www.acmicpc.net/problem/15829
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+    static long MOD = 1234567891;
+
+    public static void main(String[] args) throws IOException{
+        int n = Integer.parseInt(br.readLine());
+
+        char[] plain = br.readLine().toCharArray();
+        long res = 0;
+        long pow = 1;
+
+        for (int i = 0; i < n; i++) {
+            res += ((plain[i] - 'a' + 1) * pow);
+            pow = (pow * 31) % MOD;
+        }
+
+        System.out.println(res % MOD);
+
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/18111/Main.java b/src/BaekJoon/Dltmd202/18111/Main.java
new file mode 100644
index 0000000..e3eeb2e
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/18111/Main.java
@@ -0,0 +1,101 @@
+import java.util.*;
+import java.io.*;
+
+/**
+ * 마인크래프트
+ * https://www.acmicpc.net/problem/18111
+ */
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException{
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        Minecraft.n = Integer.parseInt(st.nextToken());
+        Minecraft.m = Integer.parseInt(st.nextToken());
+        Minecraft.baseLeft = Integer.parseInt(st.nextToken());
+        Minecraft.map = new int[Minecraft.n][Minecraft.m];
+        Minecraft answer = null;
+        int maxHeight = Integer.MIN_VALUE;
+        int minHeight = Integer.MAX_VALUE;
+
+        for (int i = 0; i < Minecraft.n; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < Minecraft.m; j++) {
+                Minecraft.map[i][j] = Integer.parseInt(st.nextToken());
+                maxHeight = Math.max(maxHeight, Minecraft.map[i][j]);
+                minHeight = Math.min(minHeight, Minecraft.map[i][j]);
+            }
+        }
+
+        for (int i = minHeight; i <= maxHeight; i++) {
+            Minecraft minecraft = new Minecraft(i);
+            minecraft.flat();
+            if(Objects.isNull(answer) || answer.compareTo(minecraft) > 0){
+                answer = minecraft;
+            }
+        }
+
+        System.out.println(answer);
+    }
+
+    static class Minecraft implements Comparable<Minecraft>{
+        static int n;
+        static int m;
+        static int[][] map;
+        static int baseLeft;
+        int left;
+        int time;
+        int height = 0;
+
+        public Minecraft(int height) {
+            this.height = height;
+            left = Minecraft.baseLeft;
+            this.time = 0;
+        }
+
+        void flat(){
+            actionFlat(height, (i, j, h) -> {
+                int gap = map[i][j] - h;
+                time += (gap * 2);
+                left += gap;
+            }, (i, j, h) -> {
+                int gap = h - map[i][j];
+                time += gap;
+                left -= gap;
+            });
+
+            if(left < 0) time = Integer.MAX_VALUE;
+        }
+
+        private void actionFlat(int height, TriConsumer<Integer, Integer, Integer> higher,
+                                TriConsumer<Integer, Integer, Integer> lower) {
+            for (int i = 0; i < n; i++) {
+                for (int j = 0; j < m; j++) {
+                    if(map[i][j] > height) higher.apply(i, j, height);
+                    else lower.apply(i, j, height);
+                }
+            }
+        }
+
+        @Override
+        public int compareTo(Minecraft o) {
+            if(Integer.compare(this.time, o.time) == 0){
+                return Integer.compare(this.height, o.height);
+            } else {
+                return Integer.compare(this.time, o.time);
+            }
+        }
+
+        @Override
+        public String toString() {
+            return time + " " + height;
+        }
+    }
+
+    @FunctionalInterface
+    interface TriConsumer<T, U, V>{
+        void apply(T t, U u, V v);
+    }
+}