天干地支 (Java代码）

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		String []tiangan={"jia","yi","bing","ding","wu","ji","geng","xin","ren","gui"};
		String []dizhi={"zi","chou","yin","mao","chen","si","wu","wei","shen","you","xu","hai"};
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		while(n<2020) n+=60;
		 n-=2020;
      System.out.printf("%s%s\n",tiangan[(n+6)%10],dizhi[n%12]);
	}
}