Binary Search
Basic Accuracy: 38.43% Submissions: 94077 Points: 1

Given a sorted array of size N and an integer K, find the position at which K is present in the array using binary search.

Example 1:

N = 5
arr[] = {1 2 3 4 5} 
K = 4
Output: 3
Explanation: 4 appears at index 3.

Example 2:

N = 5
arr[] = {11 22 33 44 55} 
K = 445
Output: -1
Explanation: 445 is not present.

Your Task:  
You dont need to read input or print anything. Complete the function binarysearch() which takes arr[], N and K as input parameters and returns the index of K in the array. If K is not present in the array, return -1.

Expected Time Complexity: O(LogN)
Expected Auxiliary Space: O(LogN) if solving recursively and O(1) otherwise.

1 <= N <= 104
1 <= arr[i] <= 104

We are replacing the old Disqus forum with the new Discussions section given below.
Click here to view old Disqus comments.

to report an issue on this page.


We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?


All Submissions

My Submissions:

Login to access your submissions.

Binary Search

Output Window