BOJ_1932 : 정수 삼각형

Author: spring0913

week6/BOJ_1932(정수 삼각형).java

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+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int n = Integer.parseInt(br.readLine());
+        int[][] arr = new int[n+1][n+1];
+        for(int i=1; i<=n; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            for(int j=1; j<=i; j++) {
+                arr[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+        int[][] d = new int[n+1][n+1];
+        for(int i=1; i<=n; i++) {
+            for(int j=1; j<=i; j++) {
+                d[i][j] = Math.max(d[i-1][j-1], d[i-1][j]) + arr[i][j];
+            }
+        }
+        int answer = arr[1][1];
+        for(int i=1; i<=n; i++) {
+            answer = Math.max(answer, d[n][i]);
+        }
+        System.out.println(answer);
+    }
+}