C#版 - Leetcode49 - 字母异位词分组 - 题解
Leetcode49.Group Anagrams
在线提交:
https://leetcode.com/problems/group-anagrams/
题目描述
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。
-
Difficulty: Medium
-
Total Accepted: 238 K
-
Total Submissions: 577.1K
-
Contributor: LeetCode
-
Related Topics:
Hash Table
String
Similar Questions:
Valid Anagram
Group Shifted Strings
思路:
方法1 已AC代码:
public class Solution
{public IList<IList<string>> GroupAnagrams(string[] strs){IList<IList<string>> res = new List<IList<string>>();if (strs == null || strs.Length == 0)return res;Dictionary<string, int> dict = new Dictionary<string,int>();foreach (var str in strs){char[] ch = str.ToCharArray();Array.Sort(ch);string s = new string(ch);if (dict.ContainsKey(s)){IList<string> list = res[dict[s]];list.Add(str);}else{IList<string> list = new List<string>();list.Add(str);dict.Add(s, res.Count);res.Add(list);}}return res;}
}
Rank:
You are here!
Your runtime beats 30.94% of csharp submissions.
方法2:
https://www.youtube.com/watch?v=YQbjqVjOESk
