java 代码

import java.io.*;
import java.lang.*;
class Main{

    public static void main(String[] args)throws Exception{
        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        String[] input = buf.readLine().split(" ");
        int n = Integer.valueOf(input[0]);
        int m = Integer.valueOf(input[1]);
        int q = Integer.valueOf(input[2]);
        int[][] mat = new int[n + 1][m + 1];
        for(int i = 1; i <= n; ++i){//构建前缀矩阵
            String[] info = buf.readLine().split(" ");
            for(int j = 1; j <= m; ++j)
                mat[i][j] = Integer.valueOf(info[j - 1]) + mat[i - 1][j] + mat[i][j - 1] - mat[i - 1][j - 1];
        }
        for(int i = 0; i < q; ++i){
            String[] info = buf.readLine().split(" ");
            int x1 = Integer.valueOf(info[0]);
            int y1 = Integer.valueOf(info[1]);
            int x2 = Integer.valueOf(info[2]);
            int y2 = Integer.valueOf(info[3]);
            System.out.println(mat[x2][y2] - mat[x1 - 1][y2] - mat[x2][y1 - 1] + mat[x1 - 1][y1 - 1]);
        }   
    }
}