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  1. #include<iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     int x1, y1, x2, y2, x3, y3, x4, y4;
  7.  
  8.     cin >> x1 >> y1 
  9.     	>> x2 >> y2 
  10.     	>> x3 >> y3 
  11.     	>> x4 >> y4;
  12.  
  13.     if (x1 == x2 || x3 == x4)
  14.     {
  15.         cout << "YES!";
  16.     }
  17.     else
  18.     {
  19.         double M1 = (double)(y2 - y1) / (x2 - x1);
  20.         double M2 = (double)(y4 - y3) / (x4 - x3);
  21.  
  22.         if (M1 != M2)
  23.         {
  24.             cout << "YES!";
  25.         }
  26.         else
  27.         {
  28.             cout << "NO";
  29.         }
  30.     }
  31.  
  32.     return 0;
  33. }
  34.  
Success #stdin #stdout 0s 5284KB
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Standard input is empty
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YES!
https://ideone.com/7YUl87
language:
C++ (gcc 8.3)
created:
73 days ago
visibility:
secret

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