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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define el "\n"
  4. #define ll long long
  5. #define ull unsigned long long
  6. #define se second
  7. #define fi first
  8. #define be begin()
  9. #define en end()
  10. #define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
  11.  
  12. struct toado {
  13.     double x, y;
  14.     friend istream& operator >> (istream& in, toado &a)
  15.     {
  16.         in >> a.x >> a.y;
  17.         return in;
  18.     }
  19. };
  20.  
  21. double distanceSquared(toado a, toado b)
  22. {
  23.     return (a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y);
  24. }
  25.  
  26. bool isParallelogram(toado a, toado b, toado c, toado d) {
  27.     return distanceSquared(a, b) == distanceSquared(c, d) && distanceSquared(b, d) == distanceSquared(a, c);
  28. }
  29.  
  30. int main()
  31. {
  32.     Faster;
  33.     toado a, b, c, d;
  34.     cin >> a >> b >> c >> d;
  35.  
  36.     if (isParallelogram(a, b, c, d))
  37.     {
  38.         cout << "Yes" << el;
  39.     }
  40.     else
  41.     {
  42.         cout << "No" << el;
  43.     }
  44.     return 0;
  45. }
  46. //code by chatgpt
  47.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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0 0 0 1 1 0 1 1
stdout
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Yes
https://ideone.com/N8W7YN
language:
C++14 (gcc 8.3)
created:
9 days ago
visibility:
public

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