[SW Expert Academy] 적고 지우기 (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AW37UDPKCgQDFATy&categoryId=AW37UDPKCgQDFATy&categoryType=CODE&problemTitle=&orderBy=PASS_RATE&selectCodeLang=ALL&select-1=3&pageSize=10&pageIndex=5

SW Expert Academy

 

import java.util.Scanner;

class Solution {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();

		for (int tc = 1; tc <= t; tc++) {

			String str = sc.next();

			boolean isWrite[] = new boolean[10];

			for (int i = 0; i < str.length(); i++) {
				isWrite[str.charAt(i)-'0'] = !isWrite[str.charAt(i)-'0'];
			}

			int count = 0;

			for (int i = 0; i < isWrite.length; i++) {
				if (isWrite[i] == true) {
					count++;
				}
			}

			System.out.println("#" + tc + " " + count);

		}
	}
}

 

적혀있는 숫자가 아니라 적혀있는 숫자의 개수를 출력한다는 점에 유의하자