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Given two strings A and B, find if A is a subsequence of B.
Example 1:
Input:
A = AXY
B = YADXCP
Output: 0
Explanation: A is not a subsequence of B
as 'Y' appears before 'A'.
Example 2:
Input:
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)
Constraints:
1<= |A|,|B| <=104
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