BOJ_11660.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class BOJ_11660 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();

        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());

        int[][] sums = 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++){
                sums[i][j] = sums[i-1][j] + sums[i][j-1] - sums[i-1][j-1] + Integer.parseInt(st.nextToken());
            }
        }

        for(int i=0; i<M; i++){
            st = new StringTokenizer(br.readLine());
            int x1 = Integer.parseInt(st.nextToken()), y1 = Integer.parseInt(st.nextToken());
            int x2 = Integer.parseInt(st.nextToken()), y2 = Integer.parseInt(st.nextToken());

            sb.append(sums[x2][y2]-sums[x2][y1-1]-sums[x1-1][y2]+sums[x1-1][y1-1]).append("\n");
        }
        System.out.print(sb);
    }
}