题目：

题解：

func wordBreak(s string, wordDict []string) bool {wordDictSet := make(map[string]bool)for _, w := range wordDict {wordDictSet[w] = true}dp := make([]bool, len(s) + 1)dp[0] = truefor i := 1; i <= len(s); i++ {for j := 0; j < i; j++ {if dp[j] && wordDictSet[s[j:i]] {dp[i] = truebreak}}}return dp[len(s)]
}