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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.     ios_base::sync_with_stdio(false);
  7.     cin.tie(NULL);
  8.  
  9.     long long x1, y1, x2, y2;
  10.     long long x3, y3, x4, y4;
  11.  
  12.     if (cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4) {
  13.         long long dx1 = x2 - x1;
  14.         long long dy1 = y2 - y1;
  15.         long long dx2 = x4 - x3;
  16.         long long dy2 = y4 - y3;
  17.  
  18.         long long tich = dx1 * dy2 - dy1 * dx2;
  19.  
  20.         if (tich == 0) {
  21.             cout << "DONG HA\n";
  22.         } else {
  23.             cout << "NAM ANH\n";
  24.         }
  25.     }
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/XIZEhw
language:
C++ (gcc 8.3)
created:
2 hours ago
visibility:
secret

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