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Facing the sun
Easy Accuracy: 46.35% Submissions: 1119 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.


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