[leetcode 139] Word Break
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Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.
For example, given
s = "leetcode",
dict = ["leet", "code"].
Return true because "leetcode" can be segmented as "leet code".
class Solution {public: bool wordBreak(string s, unordered_set<string> &dict) { const int n = s.size(); bool f[n+1]; fill_n(&f[0], n+1, false); f[0] = true; for (int i = 1; i <= n; i++) { for (int j = i - 1; j >= 0; j--) { if (f[j] && dict.find(s.substr(j, i-j)) != dict.end()) { f[i] = true; break; } } } return f[n]; }}; 0 0
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