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) {
bool *flag = new bool[s.size() + 1];
fill(flag, flag + s.size() + 1, false);
flag[0] = true;
for(int i = 1; i < s.size() + 1; i++)
{
for(int j = i-1; j >= 0; j--)
{
if(flag[j] && dict.find(s.substr(j, i-j)) != dict.end())
{
flag[i] = true;
break;
}
}
}
return flag[s.size()];
}
};

本文介绍了一种用于判断字符串是否能通过字典中的单词进行分割的算法。该算法使用动态规划来高效解决此问题,并提供了完整的C++代码实现。
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