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AhkunTa
Arithmetic
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LeetCode
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131_javascript.js
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131_javascript.js
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// 给你一个字符串 s,请你将 s 分割成一些子串,使每个子串都是 回文串 。返回 s 所有可能的分割方案。
// 回文串 是正着读和反着读都一样的字符串。
//
// 示例 1:
// 输入:s = "aab"
// 输出:[["a","a","b"],["aa","b"]]
// 示例 2:
// 输入:s = "a"
// 输出:[["a"]]
//
// 提示:
// 1 <= s.length <= 16
// s 仅由小写英文字母组成
/**
* @param {string} s
* @return {string[][]}
*/
// dfs
var partition = function (s) {
let result = [];
let dfs = (str, index, tempArr) => {
if (index == s.length) {
// push 数组的浅拷贝
result.push(tempArr.concat());
return;
}
for (let i = 0; i <= str.length; i++) {
// 分割字符串
// 前面部分
let string1 = str.substring(0, i);
// 后面部分
let string2 = str.substring(i, str.length);
// 需保证前面部分为回文 后面部分不需保证.
if (!isPalindrome(string1)) {
continue;
}
tempArr.push(string1);
dfs(string2, index + i, tempArr);
// tempArr 回溯
tempArr.pop();
}
};
dfs(s, 0, []);
// 判断回文串的方法
function isPalindrome(str) {
if (str == "") {
return false;
}
let left = 0,
right = str.length - 1;
while (left < right) {
if (str[left] !== str[right]) {
return false;
}
left++;
right--;
}
return true;
}
return result;
};
// 动态规划解法
// https://leetcode-cn.com/problems/palindrome-partitioning/solution/fen-ge-hui-wen-chuan-by-leetcode-solutio-6jkv/
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