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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int tab[1001];
  7. 	int i=0;
  8.  
  9. 	do{
  10. 		cin>>tab[i];
  11. 		i++;
  12. 	}while(tab[i-1]!=-1);
  13.  
  14. 	cout<<(tab[1]+tab[i-3])/2.0;
  15.  
  16. 	return 0;
  17. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
1 2 3 4 10 -1
stdout 
3
https://ideone.com/w97ZtW
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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