[SWEA] 2056. 연월일 달력(JAVA)

import java.util.Scanner;
 
public class Solution {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int T = scan.nextInt();
        int lim[] = {31,28,31,30,31,30,31,31,30,31,30,31};
        
        for(int i=0; i<T; i++) {
            int ymd = scan.nextInt();
 
            int year = ymd/10000;
            int month = (ymd-year*10000)/100;
            int day = ymd%100;
            
            if ((month<1 || month>12) || (day<1 || day>lim[month-1]))
                System.out.printf("#%d -1\n", i+1);
            else
                System.out.printf("#%d %04d/%02d/%02d\n", i+1,year,month,day);
        }
        scan.close();
    }
}

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19940731

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#1 1994/07/31