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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define int long long
  5.  
  6. int32_t main(){
  7. int t;
  8. cin >> t;
  9. while(t){
  10.     int n;
  11.     cin >> n;
  12.     int min_square = LLONG_MAX;    
  13.     for(int i = 1; i <= sqrt(n); i++){
  14.         if(n % i == 0){
  15.             int a = i, b = n / i;        
  16.             long double x = ((a - b) * (a - b)) / 4.0;            
  17.             if(x == floor(x) && (int)x < min_square){
  18.                 min_square = (int)x;                
  19.             }
  20.         }
  21.     }
  22.     if(min_square == LLONG_MAX or min_square == 0){
  23.         cout << -1 << endl;
  24.     }
  25.     else{
  26.         cout << min_square << endl;
  27.     }
  28.     t--;
  29. }
  30. return 0;
  31. }
Success #stdin #stdout 0s 4344KB
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https://ideone.com/AFLYLp
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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