BOJ_11660 : 구간 합 구하기 5

Author: spring0913

week6/BOJ_11660(구간 합 구하기 5).java

@@ -0,0 +1,36 @@
+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));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int N = Integer.parseInt(st.nextToken());
+        int M = Integer.parseInt(st.nextToken());
+        int[][] arr = new int[N + 1][N + 1];
+        for (int i = 1; i <= N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 1; j <= N; 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 <= N; j++) {
+                d[i][j] = d[i - 1][j] + d[i][j - 1] - d[i - 1][j - 1] + arr[i][j];
+            }
+        }
+        int x1, y1, x2, y2;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < M; i++) {
+            st = new StringTokenizer(br.readLine());
+            x1 = Integer.parseInt(st.nextToken());
+            y1 = Integer.parseInt(st.nextToken());
+            x2 = Integer.parseInt(st.nextToken());
+            y2 = Integer.parseInt(st.nextToken());
+            sb.append(d[x2][y2] - d[x2][y1 - 1] - d[x1 - 1][y2] + d[x1 - 1][y1 - 1]).append('\n');
+        }
+        System.out.print(sb);
+    }
+}