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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 Main
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc = new Scanner(System.in);
  14. 		int n = sc.nextInt();
  15. 		int[] arr = new int[n];
  16. 		for(int i=0;i<n;i++){
  17. 			arr[i] = sc.nextInt();
  18. 		}
  19.  
  20. 		int tg = sc.nextInt();
  21.  
  22. 		int l = 0;
  23. 		int r = n-1;
  24. 		boolean flag = false;
  25. 		while(l<=r){
  26. 			int m = l + (r-l)/2;
  27. 			if(arr[m] == tg){
  28. 				flag = true;
  29. 				System.out.println(m);
  30. 				break;
  31. 			}
  32. 			if(arr[l]<arr[m]){
  33. 				if(arr[l]<=tg && tg <= arr[m]){
  34. 					r = m;
  35. 				}
  36. 				else{
  37. 					l=m+1;
  38. 				}
  39. 			}
  40. 			else{
  41. 				if(arr[m]<=tg && tg <= arr[r]){
  42. 					l=m;
  43. 				}
  44. 				else{
  45. 					r = m - 1;
  46. 				}
  47. 			}
  48. 		}
  49. 		if(!flag){
  50. 			System.out.println(-1);
  51. 		}
  52.  
  53. 	}
  54. }
Success #stdin #stdout 0.13s 54584KB
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https://ideone.com/T4YQAB
Search in Rotated Sorted Array
language:
Java (HotSpot 12)
created:
4 days ago
visibility:
public

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