LeetCode：M-139. Word Break

LeetCode链接

Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or more dictionary words. You may assume the dictionary does not contain duplicate words.

For example, given
s = "leetcode",
dict = ["leet", "code"].

Return true because "leetcode" can be segmented as "leet code".

class Solution {
    public boolean wordBreak(String s, List<String> wordDict) {
        int n = s.length();
        boolean[] dp = new boolean[n+1];//0~i的子串是否能够切成字典单词
        dp[0] = true;
        for(int i=1; i<=n; i++){
            for(int j=0; j<i; j++){
                if(dp[j] && wordDict.contains(s.substring(j,i))){
                    dp[i] = true;
                    break;
                }    
            }
        }
        
        return dp[n];
    }
}