【LeetCode】#132分割回文串II(Palindrome Partitioning II)

【LeetCode】#132分割回文串II(Palindrome Partitioning II)

题目描述

给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串。
返回符合要求的最少分割次数。

示例

输入: “aab”
输出: 1
解释: 进行一次分割就可将 s 分割成 [“aa”,“b”] 这样两个回文子串。

Description

Given a string s, partition s such that every substring of the partition is a palindrome.
Return the minimum cuts needed for a palindrome partitioning of s.

Example

Input: “aab”
Output: 1
Explanation: The palindrome partitioning [“aa”,“b”] could be produced using 1 cut.

解法

class Solution {
    public int minCut(String s) {
        int[][] dp = new int[s.length()][s.length()];
        int[] cut = new int[s.length()+1];
        for(int i=s.length()-1; i>=0; i--){
            cut[i] = Integer.MAX_VALUE;
            for(int j=i; j<s.length(); j++){
                if(s.charAt(i)==s.charAt(j) && (j-i<=1 || dp[i+1][j-1]==1)){
                    dp[i][j] = 1;
                    cut[i] = Math.min(1+cut[j+1], cut[i]);
                }
            }
        }
        return cut[0]-1;
    }
}

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转载自blog.csdn.net/weixin_43858604/article/details/85099693