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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main(){
  6.     float k, n, m, d, s;
  7.     cin >> k >> n >> m >> d;
  8.     s = (d * k * n * m) / (k * n * m - k * m - k * n - m * n);
  9.     if((1/k + 1/n + 1/m >= 1) || (floor(s/k) != s/k || floor(s/n) != s/n || floor(s/m) != s/m) || !(floor(s) == s)){
  10. 	cout << "-1";
  11.     }else{
  12.     	cout << s;
  13.     }
  14.  
  15.     return 0;
  16. }
Success #stdin #stdout 0s 4384KB
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https://ideone.com/XHCBrL
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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