题解 | #简单密码#

IO操作比较耗时

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        for (char c : in.next().toCharArray()) {
            if ('a' <= c && c <= 'r') {
                c = (char) ((c - 'a') / 3 + '2');
            } else if (c == 's') {
                c = '7';
            } else if ('t' <= c && c <= 'v') {
                c = '8';
            } else if ('w' <= c && c <= 'z') {
                c = '9';
            } else if (Character.isUpperCase(c)) {
                c = (char) ((c - 'A' + 1) % 26 + 'a');
            }
            System.out.print(c);
        }
    }
}