Check for subsequence
Basic Accuracy: 60.27% Submissions: 8119 Points: 1

Given two strings A and B, find if A is a subsequence of B.

Example 1:

A = AXY 
Output: 0 
Explanation: A is not a subsequence of B
as 'Y' appears before 'A'.


Example 2:

A = gksrek
B = geeksforgeeks
Output: 1
Explanation: A is a subsequence of B.


Your Task:  
You dont need to read input or print anything. Complete the function isSubSequence() which takes A and B as input parameters and returns a boolean value denoting if A is a subsequence of B or not. 


Expected Time Complexity: O(N) where N is length of string B.
Expected Auxiliary Space: O(1)

1<= |A|,|B| <=104


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Check for subsequence

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