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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int binary(int *a, int size,int k){
  4. 	int l=0,r=size-1;
  5. 	while(l<=r){
  6. 		int mid=(l+r)/2;
  7. 		if(a[mid]==k){
  8. 			return 1;
  9. 		}
  10. 		else if(a[mid] > k){
  11. 			r=mid-1;
  12. 		}
  13. 		else{
  14. 			l=mid+1;
  15. 		}
  16. 	}
  17. 	return 0;
  18. }
  19.  
  20. int main(){
  21. 	int n;
  22. 	cin>>n;
  23. 	int key;
  24. 	cin>>key;
  25. 	int a[n];
  26. 	for(int i=0;i<n;i++){
  27. 		cin>>a[i];
  28. 	}
  29. 	int ans=binary(a,n,key);
  30. 	if(ans==1){
  31. 		cout<<"it is found the key";
  32. 	}
  33. 	else{
  34. 		cout<<"Key not found the array";
  35. 	}
  36. 	return 0;
  37. }
Success #stdin #stdout 0.01s 5284KB
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Key not found the array
https://ideone.com/w7c5Aq
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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