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  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double A,P,N;
  7. 	cin >> P >> N >> A;
  8. 	double res = (A-N)/(P-N)*1000;
  9. 	if (res >= 0 && P != N) cout <<fixed <<setprecision(1)<< res;
  10. 	else cout << -1;
  11. 	return 0;
  12. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/60B8jp
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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