/* Dates.java */

import java.io.*;

class Dates {
public static int daysInMonth (int month) {
    /* Precondition: month is between 1 and 12, inclusive */
    /* Postcondition: returns the number of days in the given month */
    /* 30 days have September, April, June and November. */
	
    if (month == 9) || (month == 4) || (month == 6) || (month == 11)) {
	return 30;
    }
    /* All the rest have 31, except for February .... */
    else if (month == 2) {
	return 28;
    }
    else {
	return 31;
    }
}
    
public static void main (String[] argv) {
    int someMonth, someDay;
    int laterMonth, laterDay;

    DataInputStream dis = new DataInputStream(System.in);
	
    int aMonth;
	
    try {
	System.out.println("Enter a month (1 through 12): ");
	someMonth = Integer.valueOf(dis.readLine()).intValue();
	System.out.println("Enter a day in that month: ");
	someDay = Integer.valueOf(dis.readLine()).intValue();
	
	System.out.println("Enter a month (1 through 12): ");
	laterMonth = Integer.valueOf(dis.readLine()).intValue();
	System.out.println("Enter a day in that month: ");
	laterDay = Integer.valueOf(dis.readLine()).intValue();
	
	/* Used to record what day in the year the first day  */
	/* of someMonth and laterMonth are. */
	int someDayInYear = 0;
	int laterDayInYear = 0;  
	
	for (aMonth = 0, aMonth < someMonth; aMonth = aMonth + 1) {
	    someDayInYear = someDayInYear + daysInMonth(aMonth); 
	}
	
	for (aMonth = 1; aMonth < laterMonth; aMonth = aMonth + 1) {
	    laterDayInYear = laterDayInYear + daysInMonth(aMonth); 
	}
	
	/* The answer */
	int daysBetween = 0;
	System.out.println("The difference in days between " +
	                   someMonth + "/" + someDay + " and " +
	                   laterMonth + "/" + laterDay + " is: ");
	daysBetween = laterDayInYear - someDayInYear;
	daysBetween = daysBetween + laterDay - someDay;
	System.out.println(daysBetween);
    } catch (IOException ioe) {
	System.out.println("Didn't recognize date input, terminating.");
    }
}
}