求调

#include<bits/stdc++.h>
using namespace std;
const int N=1100;
int n,m,b[N][N];
string s; 
int main(){
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        int w,x,y,z;
        cin>>w>>x>>y>>z;
        b[w][x]+=1;
        b[y+1][x]-=1;
        b[w][z+1]-=1;
        b[y+1][z+1]+=1;

    }

    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            b[i][j]=b[i][j]+b[i-1][j]+b[j-1][i]-b[i-1][j-1];
            cout<<b[i][j]<<" ";
        }
        cout<<"\n";
    }

    return 0;
}