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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n, m;
  6.     cin >> m >> n;
  7.     long long s[m][n], h=0;
  8.     for(int i=0; i<m; i++)
  9.     {
  10.     	for(int j=0; j<n; j++)
  11.     	{
  12.         	cin >> s[i][j];
  13.         }
  14.     }
  15.     for(int i=0; i<n; i++)
  16.     {
  17.     	h+=s[0][i];
  18.     }
  19.     cout << m*h;
  20.     return 0;
  21. }
Success #stdin #stdout 0s 4492KB
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stdin
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2 2
100 1
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stdout
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https://ideone.com/K3POSK
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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