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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		Scanner s=new Scanner(System.in);
  13. 		int a[]={-100,-23,-5,0,12,19,27,36,79,100,191};
  14. 		int low=0,high=a.length-1;
  15. 		int key=90,ans=-1;
  16. 		ans=binarySearch(a,low,high,key);
  17. 		System.out.println(ans);
  18.  
  19. 	}
  20. 	public static int binarySearch(int A[],int low,int high,int key){
  21.  
  22. 		if(low==high){
  23. 			if(A[low]==key){
  24. 				return low;
  25. 			}
  26. 			else{
  27. 				return 0;
  28. 			}
  29. 		}
  30. 		else{
  31. 			if(low>=high){
  32. 				return -1;
  33. 			}
  34. 			int mid=low+(high-low)/2;
  35. 			if(A[mid]==key){
  36. 				return mid;
  37. 			}
  38. 			if(key<A[mid]){
  39. 				return binarySearch(A,low,mid-1,key);
  40. 			}
  41. 			else{
  42. 				return binarySearch(A,mid+1,high,key);
  43. 			}
  44. 		}
  45.  
  46.  
  47. 	}
  48. }
Success #stdin #stdout 0.11s 56616KB
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-1
https://ideone.com/Zs3ewr
language:
Java (HotSpot 12)
created:
4 hours ago
visibility:
public

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