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()];
}
};