[Week05] BOJ 14002: 가장 긴 증가하는 부분 수열 4

Author: JAEHEE25

weekly/week05/BOJ_14002_가장긴증가하는부분수열4/JAEHEE25.java

@@ -0,0 +1,50 @@
+package week05.BOJ_14002_가장긴증가하는부분수열4;
+
+import java.util.*;
+import java.lang.*;
+import java.io.*;
+
+class BOJ14002 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N = Integer.parseInt(br.readLine());
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int[] arr = new int[N];
+        for (int i = 0; i < N; i++) {
+            arr[i] = Integer.parseInt(st.nextToken());
+        }
+
+        int[] dp = new int[N];
+        for (int i = 0; i < N; i++) {
+            dp[i] = 1;
+            for (int j = 0; j < i; j++) {
+                if (arr[j] < arr[i]) {
+                    dp[i] = Math.max(dp[i], dp[j] + 1);
+                }
+            }
+        }
+
+        StringBuilder answer = new StringBuilder();
+        int max = 0;
+        for (int i = 0; i < N; i++) {
+            if (dp[i] > max) {
+                max = dp[i];
+            }
+        }
+        answer.append(max).append("\n");
+
+        Stack<Integer> stack = new Stack<>();
+        for (int i = N - 1; i >= 0; i--) {
+            if (dp[i] == max) {
+                stack.push(arr[i]);
+                max--;
+            }
+        }
+
+        while (!stack.isEmpty()) {
+            answer.append(stack.pop()).append(" ");
+        }
+
+        System.out.println(answer);
+    }
+}