不不不不不不不不不不不不不不不不不不，我无疑是愤怒的

```cpp
#include<bits/stdc++.h>
using namespace std;
long n,c,m,dt[1001][1001],s[1001][1001],mx=-1e9,d,x,y;
int main(){
    ios::sync_with_stdio(0),cin.tie(0);
    cin>>n>>m>>c;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>dt[i][j];
            s[i][j]=s[i-1][j]+s[i][j-1]+dt[i][j]-s[i-1][j-1];
        }
    }
    int l=c-1;
    int x2,y2;
    for(int i=1;i<=n-c+1;i++){
        for(int j=1;j<=m-c+1;j++){
            x2=j+l,y2=i+l;
            d=s[x2][y2]-s[i-1][y2]-s[x2][j-1]+s[i-1][j-1];
            if(d>mx) mx=d,x=j,y=i;
        }
    }
    cout<<y<<' '<<x;
    return 0;
}

x2=j+l,y2=i+l;

#include <bits/stdc++.h>
using namespace std;
long long a[1010][1010];
long long z[1010][1010];
int main(){
	int n,m,c;
	cin>>n>>m>>c;
	long long mx=-1e9,mxx,mxy;
	for (int i=1;i<=n;i++){
		for (int j=1;j<+m;j++){
			cin>>a[i][j];
			z[i][j]=z[i-1][j]+z[i][j-1]+a[i][j]-z[i-1][j-1];
		}
	}
	for (int i=1;i<=n-c+1;i++){
		for (int j=1;j<=m-c+1;j++){
			int x2 = i+c-1;
            int y2 = j+c-1;
			if (z[x2][y2]-z[i-1][y2]-z[x2][j-1]+z[i-1][j-1]>mx){
				mx=z[x2][y2]-z[i-1][y2]-z[x2][j-1]+z[i-1][j-1];
				mxx=i;
				mxy=j;
			}
			
		}
	}
	cout<<mxx<<" "<<mxy;
	return 0;
}
"int j=1;j<+m;j++"

#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z,n,m,sum=0;
	cin>>x>>y>>z>>m>>n;
	for(int gj=0;gj<=n/x;gj++){
		for(int mj=0;mj<=n/y;mj++){
			int xj=m-gj-mj;
			if(xj>=0&&xj%z==0&&gj*x+mj*y+xj/z==n){
				sum++;
			}
		}
	}
	cout<<sum;
	return 0;
}