1332. Remove Palindromic Subsequences
package LeetCode_1332 /** * 1332. Remove Palindromic Subsequences * https://leetcode.com/problems/remove-palindromic-subsequences/ * * Given a string s consisting only of letters 'a' and 'b'. * In a single step you can remove one palindromic subsequence from s. Return the minimum number of steps to make the given string empty. A string is a subsequence of a given string, if it is generated by deleting some characters of a given string without changing its order. A string is called palindrome if is one that reads the same backward as well as forward. Example 1: Input: s = "ababa" Output: 1 Explanation: String is already palindrome * */ class Solution { /* * solution: check string if Palindromic, if yes, use 1 time, * else because subsequence don't have to be consecutive, and just contains a,b, so can be delete up to 2 times * */ fun removePalindromeSub(s: String): Int { var i = 0 var j = s.length while (i < j) { if (s[i] != s[j]) { //not Palindromic return 2 } i++ j-- } return 1 } }
标签:
palindrome
, leetcode
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