Handle Score
@Ibrahim Nash 6560
@blackshadows 6400
@mb1973 5777
@Quandray 5271
@akhayrutdinov 5111
@saiujwal13083 5074
@kirtidee18 4356
@sanjay05 3762
@mantu_singh 3638
@gfgaccount 3601
@marius_valentin_dragoi 3525
Complete Leaderboard
Find Transition Point
Easy Accuracy: 53.15% Submissions: 98366 Points: 2

Given a sorted array containing only 0s and 1s, find the transition point. 

Example 1:

N = 5
arr[] = {0,0,0,1,1}
Output: 3
Explanation: index 3 is the transition 
point where 1 begins.

Example 2:

N = 4
arr[] = {0,0,0,0}
Output: -1
Explanation: Since, there is no "1",
the answer is -1.

Your Task:
You don't need to read input or print anything. The task is to complete the function transitionPoint() that takes array and N as input parameters and returns the 0 based index of the position where "0" ends and "1" begins. If array does not have any 1s, return -1. If array does not have any 0s, return 0.

Expected Time Complexity: O(LogN)
Expected Auxiliary Space: O(1)

1 ≤ N ≤ 500000
0 ≤ arr[i] ≤ 1

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.

Find Transition Point

Output Window