33 lines
1.3 KiB
Java
33 lines
1.3 KiB
Java
import java.util.Calendar;
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import java.util.GregorianCalendar;
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public class FiveFSS {
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private static boolean[] years = new boolean[201];
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private static int[] month31 = {Calendar.JANUARY, Calendar.MARCH, Calendar.MAY,
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Calendar.JULY, Calendar.AUGUST, Calendar.OCTOBER, Calendar.DECEMBER};
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public static void main(String[] args) {
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StringBuilder months = new StringBuilder();
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int numMonths = 0;
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for (int year = 1900; year <= 2100; year++) {
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for (int month : month31) {
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Calendar date = new GregorianCalendar(year, month, 1);
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if (date.get(Calendar.DAY_OF_WEEK) == Calendar.FRIDAY) {
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years[year - 1900] = true;
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numMonths++;
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//months are 0-indexed in Calendar
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months.append((date.get(Calendar.MONTH) + 1) + "-" + year +"\n");
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}
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}
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}
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System.out.println("There are "+numMonths+" months with five weekends from 1900 through 2100:");
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System.out.println(months);
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System.out.println("Years with no five-weekend months:");
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for (int year = 1900; year <= 2100; year++) {
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if(!years[year - 1900]){
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System.out.println(year);
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}
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}
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}
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}
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