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You are given a string s containing lowercase letters and an integer k. You need to :
First, change some characters of s to other lowercase English letters. Then divide s into k non-empty disjoint substrings such that each substring is palindrome. Return the minimal number of characters that you need to change to divide the string.
Example 1:
Input: s = "abc", k = 2 Output: 1 Explanation: You can split the string into "ab" and "c", and change 1 character in "ab" to make it palindrome. Example 2:
Input: s = "aabbc", k = 3 Output: 0 Explanation: You can split the string into "aa", "bb" and "c", all of them are palindrome. Example 3:
Input: s = "leetcode", k = 8 Output: 0
Constraints:
1 <= k <= s.length <= 100. s only contains lowercase English letters.
给你一个由小写字母组成的字符串 s,和一个整数 k。
请你按下面的要求分割字符串:
首先,你可以将 s 中的部分字符修改为其他的小写英文字母。 接着,你需要把 s 分割成 k 个非空且不相交的子串,并且每个子串都是回文串。 请返回以这种方式分割字符串所需修改的最少字符数。
示例 1:
输入:s = "abc", k = 2 输出:1 解释:你可以把字符串分割成 "ab" 和 "c",并修改 "ab" 中的 1 个字符,将它变成回文串。 示例 2:
输入:s = "aabbc", k = 3 输出:0 解释:你可以把字符串分割成 "aa"、"bb" 和 "c",它们都是回文串。 示例 3:
输入:s = "leetcode", k = 8 输出:0
提示:
1 <= k <= s.length <= 100
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