diff --git a/src/BaekJoon/Dltmd202/1085/Main.java b/src/BaekJoon/Dltmd202/1085/Main.java
new file mode 100644
index 0000000..b918449
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/1085/Main.java
@@ -0,0 +1,47 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.StringTokenizer;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    static class Coordinate{
+        int x;
+        int y;
+
+        public Coordinate(int x, int y) {
+            this.y = y;
+            this.x = x;
+        }
+
+        private int minDifference(Coordinate c){
+            return Math.min(
+                    Math.abs(this.x - c.x),
+                    Math.abs(this.y - c.y)
+            );
+        }
+    }
+
+    public static void main(String[] args) throws IOException {
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        Coordinate hansu = new Coordinate(
+                Integer.parseInt(st.nextToken()),
+                Integer.parseInt(st.nextToken())
+        );
+
+        Coordinate lowerLeft = new Coordinate(0 ,0);
+
+        Coordinate upperRight = new Coordinate(
+                Integer.parseInt(st.nextToken()),
+                Integer.parseInt(st.nextToken())
+        );
+
+        int min = Integer.MAX_VALUE;
+
+        min = Math.min(min, hansu.minDifference(lowerLeft));
+        min = Math.min(min, hansu.minDifference(upperRight));
+
+        System.out.println(min);
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/1181/Main.java b/src/BaekJoon/Dltmd202/1181/Main.java
new file mode 100644
index 0000000..13d5258
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/1181/Main.java
@@ -0,0 +1,48 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+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());
+        String[] strs = new String[n];
+        Set<String> visited = new HashSet<>();
+
+        for (int i = 0; i < n; i++) {
+            strs[i] = br.readLine();
+        }
+
+        Arrays.sort(strs,
+                new Comparator<String>() {
+                    @Override
+                    public int compare(String o1, String o2) {
+                        if(o1.length() == o2.length())
+                            return o1.compareTo(o2);
+                        else {
+                            return o1.length() - o2.length();
+                        }
+                    }
+                });
+
+        System.out.println(
+                Arrays.stream(strs)
+                        .filter(s -> {
+                            if(!visited.contains(s)){
+                                visited.add(s);
+                                return true;
+                            }
+                            return false;
+                        })
+                        .map(String::valueOf)
+                        .collect(Collectors.joining("\n"))
+        );
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/1259/Main.java b/src/BaekJoon/Dltmd202/1259/Main.java
new file mode 100644
index 0000000..d252ed4
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/1259/Main.java
@@ -0,0 +1,27 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+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 {
+        while (true){
+            int n = Integer.parseInt(br.readLine());
+            if(n == 0) break;
+            char[] ary = String.valueOf(n).toCharArray();
+            sb.append(getAnswer(ary)).append("\n");
+        }
+        System.out.println(sb.toString());
+    }
+
+    private static String getAnswer(char[] ary) {
+        int left = 0, right = ary.length - 1;
+
+        while (left < right){
+            if(ary[left++] != ary[right--]) return "no";
+        }
+        return "yes";
+    }
+}
diff --git a/src/BaekJoon/Dltmd202/1436/Main.java b/src/BaekJoon/Dltmd202/1436/Main.java
new file mode 100644
index 0000000..021f455
--- /dev/null
+++ b/src/BaekJoon/Dltmd202/1436/Main.java
@@ -0,0 +1,31 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+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 turn = Integer.parseInt(br.readLine());
+        long n = 666;
+
+        int cnt = 0;
+        while (true){
+            char[] numArray = String.valueOf(n).toCharArray();
+            if(isValid(numArray)) cnt++;
+            if(cnt == turn) break;
+            n++;
+        }
+        System.out.println(n);
+    }
+
+    private static boolean isValid(char[] numArray) {
+        for (int i = 0; i <= numArray.length - 3; i++) {
+            if(numArray[i] == '6' && numArray[i + 1] == '6' && numArray[i + 2] == '6'){
+                return true;
+            }
+        }
+        return false;
+    }
+}