SWEA 1926. 간단한 369게임

import java.util.Scanner;



public class Solution_1926간단한369게임 {

	public static void main(String[] args) {
	
	Scanner sc = new Scanner(System.in);

	int T = sc.nextInt();
	
	for(int i = 1; i <= T; i++) {
		int a = i / 10; // 몫
		int b = i % 10; // 나머지
	
		if( a == 3 || a == 6 || a == 9) {
			if(b == 3|| b == 6 || b == 9) {
				System.out.print("-- ");
				continue;
			}
			
			System.out.print("- ");
			
			
		}
		else if (b == 3 || b == 6 || b== 9)
			System.out.print("- ");
		
	else {
		System.out.print(i+" ");
	}
	}}}