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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. const ll con = 1e9;
  4. #define YES cout << "YES\n"
  5. #define NO cout << "NO\n"
  6. #define Yes cout << "Yes\n"
  7. #define No cout << "No\n"
  8. using namespace std;
  9. void solve() {
  10.     int n , m ;
  11.     cin >> n >> m;
  12.     bool notiring = false ;
  13.     ll grid[n][m];
  14.     ll sumx = 0 ;
  15.     for (int i = 0; i < n; i++) {
  16.         for (int j = 0; j < m; j++) {
  17.             cin >> grid[i][j];
  18.             sumx += grid[i][j];
  19.         }
  20.     }
  21.     if ((n % 2== 0 && m % 2 !=0 ) || (n % 2 != 0 && m % 2 != 0)
  22.         || (n % 2!= 0 && m % 2 ==0 ))
  23.         notiring = true;
  24.     if (notiring) {
  25.         cout<<sumx<<'\n';
  26.         return;
  27.     }
  28.     ll mini = INT_MAX ;
  29.     for ( int i = 0 ; i < n ; i++) {
  30.         for ( int j = 0 ; j < m ; j++) {
  31.             if ( (i + j) % 2 != 0)
  32.                 mini = min(mini, grid[i][j]);
  33.         }
  34.     }
  35.     cout << sumx - mini << '\n';
  36. }
  37. int main(){
  38.     solve();
  39. }
Success #stdin #stdout 0s 5304KB
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https://ideone.com/uqWKBv
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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