心得

鍵盤共有三行[qwertyuiop, asdfghjkl, zxcvbnm]，找出在同行字母拼湊出來的單字。

問題

Given a List of words, return the words that can be typed using letters of alphabet on only one row’s of American keyboard like the image below.

 

Example 1:

Input: ["Hello", "Alaska", "Dad", "Peace"]
Output: ["Alaska", "Dad"]

Note:

1. You may use one character in the keyboard more than once.
2. You may assume the input string will only contain letters of alphabet.

答案

public class Solution {
    public string[] FindWords(string[] words) {
        string row_1 = "qwertyuiop";
        string row_2 = "asdfghjkl";
        string row_3 = "zxcvbnm";

        return words.Where(x =>
        {
            var str = x.ToLower().ToArray();
            return !str.Any(y => !row_1.Contains(y)) || !str.Any(y => !row_2.Contains(y)) || !str.Any(y => !row_3.Contains(y));
        }).ToArray();
    }
}