0 0 0 0 0 0

0 +1 0 0 0 -1

0 +1 0 0 0 -1

0 +1 0 0 0 -1

0 +1 0 0 0 -1

0 0 0 0 0 0

 1 #include<bits/stdc++.h>

 2 using namespace std;

 3 int n,m,a[1001][1001],c[1001][1001];

 4

 5 int main(){

 6     scanf("%d%d",&n,&m);

 7     while(m--){

 8         int x1,x2,y1,y2;

 9         scanf("%d%d%d%d",&x1,&y1,&x2,&y2);

10         for(int i=x1;i<=x2;i++){

11             c[i][y1]+=1;

12             c[i][y2+1]-=1;

13         }

14     }

15     for(int i=1;i<=n;i++)

16         for(int j=1;j<=n;j++)

17             a[i][j]=a[i][j-1]+c[i][j];

18     for(int i=1;i<=n;i++){

19         for(int j=1;j<=n;j++){

20             cout<<a[i][j]<<" ";

21         }

22         cout<<endl;

23     }

24 }