HackMD
1312.Minimum Insertion Steps to Make a String Palindrome
tags: Hard,String,DP
1312. Minimum Insertion Steps to Make a String Palindrome
題目描述
Given a string s. In one step you can insert any character at any index of the string.
Return the minimum number of steps to make s palindrome.
A Palindrome String is one that reads the same backward as well as forward.
範例
Example 1:
Input: s = "zzazz"
Output: 0
Explanation: The string "zzazz" is already palindrome we do not need any insertions.
Example 2:
Input: s = "mbadm"
Output: 2
Explanation: String can be "mbdadbm" or "mdbabdm".
Example 3:
Input: s = "leetcode"
Output: 5
Explanation: Inserting 5 characters the string becomes "leetcodocteel".
Constraints:
- 1 <=
s.length<= 500 sconsists of lowercase English letters.
