sume_partiale_matrici

#include <iostream>
using namespace std;
unsigned long a[100][100];

int main() {

unsigned long n,m,i,j,s[100][100];
cout<<"n=";cin>>n;
cout<<"m=";cin>>m;
for (i=1;i<=n;i++)
for (j=1;j<=m;j++)
cin>>a[i][j];

//constr s
for (i=1;i<=n;i++)
for (j=1;j<=m;j++)
s[i][j] = a[i][j] + s[i - 1][j] + s[i][j - 1] - s[i - 1][j - 1];

for (i=1;i<=n;i++) {
for (j=1;j<=m;j++)
 cout<<s[i][j]<<' ';
 cout<<endl;
}
  return 0;
}