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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. typedef long long ll;
  6.  
  7. int x[3], y[3];
  8.  
  9. ll l(ll x1, ll y1, ll x2, ll y2)
  10. {
  11.     return (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2);
  12. }
  13.  
  14. void solve()
  15. {
  16.     long long side[3];
  17.     for(int i = 0; i < 3; i++)
  18.         side[i] = l(x[i], y[i], x[(i+1)%3], y[(i+1)%3]);
  19.     for(int i = 0; i < 3; i++)
  20.     {
  21.         if(side[i] < side[i-1])
  22.             swap(side[i], side[i-1]);
  23.     }
  24.     if(side[0] + side[1] == side[2])
  25.         cout << "RIGHT";
  26.     else if(side[0] + side[1] > side[2])
  27.         cout << "ACUTE";
  28.     else cout << "OBTUSE";
  29. }
  30.  
  31. int main()
  32. {
  33.     for(int i = 0; i < 3; i++)
  34.         cin >> x[i] >> y[i];
  35.     solve();
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
-10 -6 3 1 0 4
stdout 
OBTUSE
https://ideone.com/ix3Isw
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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