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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int a, b, h;
  6. 	cin >> a >> b >> h;
  7. 	cout << 0.5 * ( a + b ) * h;
  8. 	cout.precision (2);
  9. 	cout << fixed << 0.5 * ( a + b ) * h;
  10. 	return 0;
  11. }
Success #stdin #stdout 0s 5280KB
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stdin
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10 5 3
stdout
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22.522.50
https://ideone.com/NpnfhT
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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