# Leetcode 392 - Is subsequence

`Note`

- DP
- It’s just
`find the longest common subsequence`

. And if its`length === s.length`

, it means`true`

!

- It’s just
- Doule pointer

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" |

`DP`

1 | /** |

`Double Pointers`

1 | /** |