class Solution {
    public boolean wordBreak(String s, List<String> wordDict) {
        boolean[] dp = new boolean[s.length() + 1];
        dp[s.length()] = true;

        for(int i = s.length()-1; i >= 0; i--){
            for(String w: wordDict){
                if((i + w.length()) <= s.length() && s.startsWith(w, i)){
                    dp[i] = dp[i + w.length()];
                }
                if(dp[i]){
                    break;
                }
            }
        }
        return dp[0];
    }
}