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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double a,b,c,temp;
  7. 	cin >> a >> b >> c;
  8. 	if(a < b+c && b < c+a && c < a+b){
  9. 		cout << "Valid\n";
  10. 		double s = (a+b+c)/2.0;
  11. 		cout << fixed << sqrt(s*(s-a)*(s-b)*(s-c));
  12. 	}else{
  13. 		cout << "Invalid";
  14. 	}
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 5228KB
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stdin
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3 4 1
stdout
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Invalid
https://ideone.com/1SEyKl
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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