수 조작하기 2

using System;

public class Solution {
    public string solution(int[] numLog) {
        string answer = "";
        for(int i=1;i<numLog.Length;i++){
            switch(numLog[i] - numLog[i - 1])
            {
                case 1 : answer += 'w'; break;
                case -1 : answer += 's'; break;
                case 10 : answer += 'd'; break;
                case -10 : answer += 'a'; break;    
            }
        }
        return answer;
    }
}