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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. int main() {
  5.     double xA, yA, xB, yB, xC, yC, xD, yD;
  6.     cin >> xA >> yA >> xB >> yB >> xC >> yC >> xD >> yD;
  7.     double AB = sqrt((xA-xB)*(xA-xB)+(yA-yB)*(yA-yB)),
  8.     BC = sqrt((xB-xC)*(xB-xC)+(yB-yC)*(yB-yC)),
  9.     CD = sqrt((xC-xD)*(xC-xD)+(yC-yD)*(yC-yD)),
  10.     DA = sqrt((xD-xA)*(xD-xA)+(yD-yA)*(yD-yA)),
  11.     AC = sqrt((xA-xC)*(xA-xC)+(yA-yC)*(yA-yC)),
  12.     BD = sqrt((xB-xD)*(xB-xD)+(yB-yD)*(yB-yD));
  13.     unordered_map<double,ll> ans;
  14.     ans[AB]++;
  15.     ans[BC]++;
  16.     ans[DA]++;
  17.     ans[AC]++;
  18.     ans[BD]++;
  19.     ans[CD]++;
  20.     for(pair<double,ll> it : ans) {
  21.         if(it.second>=4) {cout << "Yes"; return 0;}
  22.     }
  23.     cout << "No";
  24. }
  25. //from Bip
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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0 0 0 1 1 0 1 1
stdout
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Yes
https://ideone.com/qSo21w
language:
C++14 (gcc 8.3)
created:
9 days ago
visibility:
public

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