[SW Expert Academy] 1926. 간단한 369게임 - D2 / Java

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=2&contestProbId=AV5PTeo6AHUDFAUq&categoryId=AV5PTeo6AHUDFAUq&categoryType=CODE&problemTitle=&orderBy=FIRST_REG_DATETIME&selectCodeLang=ALL&select-1=2&pageSize=10&pageIndex=1

SW Expert Academy

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Solution {

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		int N = Integer.parseInt(br.readLine());

		for (int i = 1; i <= N; i++) {
        		// 현재 숫자가 3 6 9 포함하면
			if (String.valueOf(i).contains("3") || String.valueOf(i).contains("6") || String.valueOf(i).contains("9")) {
				int num = i;
				int cnt = 0; // 369 개수

				while (num > 0) {
					int num2 = num % 10;
					if (num2 == 3 || num2 == 6 || num2 == 9) {
						cnt++;
					}
					num = num / 10;
				}

				for (int j = 1; j <= cnt; j++) {
					sb.append("-");
				}
				sb.append(" ");
			} else {
				sb.append(i).append(" ");
			}
		}
		System.out.println(sb);
	}
}