#include<bits/stdc++.h>
using namespace std;


class Solution {
public:
    bool wordBreak(string s, vector<string>& wordDict) {
        unordered_set<string> wordDictSet(wordDict.begin(),wordDict.end());
        auto dp = vector <bool> (s.size() + 1);
        dp[0] = true;
        for (int i = 1; i <= s.size(); ++i) {
            for (int j = 0; j < i; ++j) {
                if (dp[j] && wordDictSet.find(s.substr(j, i - j)) != wordDictSet.end()) {
                    dp[i] = true;
                    break;
                }
            }
        }

        return dp[s.size()];
    }
};

int main()
{
    return 0;
}