NYOJ题目768移位密码

------------------

AC代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        
        BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
        
        boolean first=true;
        while(first || reader.ready()){
            first=false;
            
            String s[]=reader.readLine().split(" ");
            String ans=new String(decoding(s[0],Integer.parseInt(s[1])));
            System.out.println(ans);
        }
        
    }
    
    public static char[] decoding(String s,int k){
        char cs[]=s.toCharArray();
        for(int i=0;i<cs.length;i++){
            cs[i]=(char) (((cs[i]-'A'+26-k)%26)+'A');
        }
        return cs;
    }
    
}

 题目来源： http://acm.nyist.net/JudgeOnline/problem.php?pid=768