字母异位词分组(Group Anagrams)
给定一个字符串数组,将字母异位词组合在一起。字母异位词指字母相同,但排列不同的字符串。
示例:
输入: ["eat", "tea", "tan", "ate", "nat", "bat"]
,
输出:
[
["ate","eat","tea"],
["nat","tan"],
["bat"]
]
说明:
- 所有输入均为小写字母。
- 不考虑答案输出的顺序。
原题链接:https://leetcode-cn.com/problems/group-anagrams/
题解:
class Solution {
public:
vector<vector<string>> groupAnagrams(vector<string>& strs) {
vector<vector<string>> result;
map<string, int> m;
int k = 0;
vector<string> s = strs;
for (int i = 0; i < s.size(); ++i){
sort(s[i].begin(), s[i].end());
if (!m.count(s[i])){
m[s[i]] = k ++;
result.push_back(vector<string>{});
}
result[m[s[i]]].push_back(strs[i]);
}
return result;
}
};