[SW Expert Academy] 2016년 요일 맞추기 (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AWWOwecaFrIDFAV4&categoryId=AWWOwecaFrIDFAV4&categoryType=CODE&problemTitle=&orderBy=PASS_RATE&selectCodeLang=ALL&select-1=3&pageSize=10&pageIndex=6

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();

		int days[] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
		int day[] = { 4, 5, 6, 0, 1, 2, 3 };

		for (int tc = 1; tc <= t; tc++) {
			int m = sc.nextInt();
			int n = sc.nextInt();

			int sum = 0;

			for (int i = 0; i < m; i++) {
				sum += days[i];
			}
			sum += n;
			
			//System.out.println(sum);
			sum-=1; //-1을 먼저 해줘야함
			System.out.println("#" + tc + " " + day[sum % 7]);
		}

	}
}

 

인덱스가 0부터 시작하기 때문에 sum에 -1을 해줘야한다는 것이 중요하다.