Facing the sun
Easy Accuracy: 48.19% Submissions: 766 Points: 2

Given an array H representing heights of buildings. You have to count the buildings which will see the sunrise (Assume : Sun rise on the side of array starting point).

Example 1:

Input: 
N = 5
H[] = {7, 4, 8, 2, 9}
Output: 3
Explanation: As 7 is the first element, it
can see the sunrise. 4 can't see the
sunrise as 7 is hiding it.  8 can see.
2 can't see the sunrise. 9 also can see
the sunrise.

Example 2:

Input: 
N = 4
H[] = {2, 3, 4, 5}
Output: 4
Explanation: As 2 is the first element, it
can see the sunrise.  3 can see the
sunrise as 2 is not hiding it. Same for 4
and 5, they also can see the sunrise.

Your Task:  
You don't need to read input or print anything. Your task is to complete the function countBuildings() which takes the array of integers and n as parameters and returns an integer denoting the answer.

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

Constraints:
1 ≤ N ≤ 106
1 ≤ Hi ≤ 108

 

to report an issue on this page.

Editorial

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

Yes

All Submissions

My Submissions:

Login to access your submissions.

Output Window