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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n;
  7. 	double a,b,res=0;
  8. 	cin>>n;
  9.  
  10. 	for(int i=0;i<n;i++){
  11. 		cin>>a>>b;
  12.  
  13. 		res+=a*b;
  14. 	}
  15.  
  16. 	cout<<res;
  17.  
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
5
1.0 12.0
0.7 5.2
0.9 10.7
0.5 20.4
0.2 30.0
stdout 
41.47
https://ideone.com/VQb5y7
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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