49. Group Anagrams LeetCode
2016-03-16 14:30
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题意：把字符串数组中的字符串分组，字符串按字典序排序后一样的字符串放在同一个组内。
题解：对每个串排序，然后hash。
题解：对每个串排序，然后hash。
class Solution {
public:
vector<vector<string>> groupAnagrams(vector<string>& strs) {
sort(strs.begin(),strs.end());
unordered_map<string,vector<string> > hash;
hash.clear();
int n = strs.size();
vector<vector<string>> ans;
ans.clear();
for(int i = 0; i < n; i++)
{
string tmp = strs[i];
sort(tmp.begin(),tmp.end());
hash[tmp].push_back(strs[i]);
}
for(auto it = hash.begin(); it != hash.end(); it++)
ans.push_back(it->second);
return ans;
}
};
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