package dayprint;

import java.util.*;

public class DayPrint {
	public static void main(String[] args) {
		int whichDay = 0;
		Scanner sc = new Scanner(System.in);
		System.out.println("曜日の日付判定を致します。日付を入力して下さい。");
		System.out.print("年: ");
		int inputYear = Integer.parseInt(sc.nextLine());
		System.out.print("月: ");
		int inputMonth = Integer.parseInt(sc.nextLine());
		System.out.print("日: ");
		int inputDay = Integer.parseInt(sc.nextLine());
		int numOfUruudoshi = countUruudoshi(inputYear);
		int howManyDays = countNumOfDays(inputYear, inputMonth, inputDay);
		
		if(inputYear == 2009){
			whichDay = howManyDays % 7;
		}else if(inputYear < 2009){
			whichDay = (howManyDays - 2009 + inputYear - numOfUruudoshi) % 7;
		}else if(inputYear > 2009){
			whichDay = (howManyDays - 2009 + inputYear + numOfUruudoshi) % 7;
		}
		
		String[] dayOfWeek = {"木","金","土","日","月","火","水"};
		if(whichDay < 0){
			whichDay += 7;
		}
		System.out.println("あなたの入力された日付は" + dayOfWeek[whichDay] + "です。");
	}
	
	static int countUruudoshi(int i_year){
		int counter = 0;
		if(i_year <= 2009){
			for(int i = 2008; i >= i_year; i--){
				if((i%4 == 0 && i%100 != 0) || i%400 == 0){
					counter++;
				}
			}
		}else{
			for(int i = 2010; i <= i_year; i--){
				if((i%4 == 0 && i%100 != 0) || i%400 == 0){
					counter++;
				}
			}
		}
		return counter;
	}

	static int countNumOfDays(int i_year, int i_month, int i_day){
		int total_day = 0;
		for(int i = 1; i < i_month; i++){
			switch(i){
				case 1:
				case 3:
				case 5:
				case 7:
				case 8:
				case 10:
				case 12:
					total_day += 31;
					break;
				case 2:
					if((i_year%4 == 0 && i_year%100 != 0) || i_year%400 == 0){
						total_day += 29;
					}else{
						total_day += 28;
					}
					break;
				case 4:
				case 6:
				case 9:
				case 11:
					total_day += 30;
					break;
			}
		}
		return total_day + i_day - 1;
	}
}