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// @Title: 分割回文串 (Palindrome Partitioning)
// @Author: 15816537946@163.com
// @Date: 2021-03-07 23:45:14
// @Runtime: 324 ms
// @Memory: 22 MB
func partition(s string) [][]string {
	res := make([][]string, 0)
	cur := make([]string, 0, len(s))
	dfs(s, 0, cur, &res)
	return res

}

func dfs(s string, i int, cur []string, res *[][]string) {
	if len(s) == i {
		tmp := make([]string, len(cur))
		copy(tmp, cur)
		*res = append(*res, tmp)
		return
	}

	for j := i; j < len(s); j++ {
		if isPalindrome(s[i : j+1]) {
			dfs(s, j+1, append(cur, s[i:j+1]), res)
		}
	}
}

func isPalindrome(s string) bool {
	slen := len(s) - 1
	for i, j := 0, slen; i < j; i, j = i+1, j-1 {
		if s[i] != s[j] {
			return false
		}
	}

	return true
}