fuck you.

#include<bits/stdc++.h>
using namespace std;
fuck you.
int a[2010][2010],b[2010][2010];
fuck you.
void insert(int x1,int y1,int x2,int y2){
    b[x1][y1]+=1;
    b[x2+1][y1]-=1;
    b[x1][y2+1]-=1;
    b[x2+1][y2+1]+=1;
}
int main(){
    int n,m;
    cin>>n>>m;
    
    fuck you.
    while(m--){
        int x1,y1,x2,y2;
        cin>>x1>>y1>>x2>>y2;
        insert(x1,y1,x2,y2);
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            b[i][j]+=b[i-1][j]+b[i][j-1]-b[i-1][j-1];

        }
    }
  fuck you.
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            cout<<b[i][j]%2;
        }
        printf("\n");
    }
    return 0;
}