题解 | 明天星期几？

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int d = in.nextInt();
        switch (d%7) {
            case 1: System.out.println(2); break;
            case 2: System.out.println(3); break;
            case 3: System.out.println(4); break;
            case 4: System.out.println(5); break;
            case 5: System.out.println(6); break;
            case 6: System.out.println(7); break;
            case 0: System.out.println(1); break;
        }
    }
}