Type: [[Two Pointers Questions (C)]]
Easy(12/11/2022)
Leetcode link: https://leetcode.com/problems/is-subsequence/description/
Notes: 2 pointers
Given two strings s and t, return true if s is a subsequence of t, or false otherwise.
A subsequence of a string is a new string that is formed from the original string by deleting some (can be none) of the characters without disturbing the relative positions of the remaining characters. (i.e., "ace" is a subsequence of "abcde" while "aec" is not).
Example 1:
Input: s = "abc", t = "ahbgdc" Output: true
Example 2:
Input: s = "axc", t = "ahbgdc" Output: false
def isSubsequence(self, s: str, t: str) -> bool:
pointer1, pointer2 = 0, 0
while pointer1 < len(s) and pointer2 < len(t):
if s[pointer1] == t[pointer2]:
pointer1 += 1
pointer2 += 1
return pointer1 == len(s)