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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int v[50],n,x;
  6. 	cin>>n>>x;
  7. 	for(int i=0;i<n;i++)
  8. 	{
  9. 		cin>>v[i];
  10. 	}
  11. 	int st=0,dr=n-1,mij,gasit=-1;
  12. 	while(st<=dr){
  13. 		mij=(st+dr)/2;
  14. 		if(v[mij]==x){
  15. 		gasit=mij;
  16. 		break;
  17. 		}
  18. 		else
  19. 		if(x<v[mij]){
  20. 			dr=mij-1;
  21. 		}
  22. 		else if(x>v[mij])
  23. 		st=mij+1;
  24. 	}
  25. 	cout<<gasit;
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0.01s 5320KB
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stdin
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5 7
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stdout
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3
https://ideone.com/V5kUt4
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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