题解 | 凯撒加密

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        in.nextLine();
        String s = in.nextLine();
        //A(65-90)    a(97-122)
        n = n%26;
        for(int i=0;i<s.length();i++){
            int temp = (int)(s.charAt(i));
            temp += n;
            if(temp>122)temp -= 26;
            char c = (char)temp;
            System.out.print(c);
        }
    }
}