AtCoder Regular Contest #002
A - うるう年
問題: http://arc002.contest.atcoder.jp/tasks/arc002_1
import java.util.*; public class Main { public static void main(String[] args) { Scanner s = new Scanner(System.in); GregorianCalendar c = new GregorianCalendar(); c.setGregorianChange(new Date(Long.MIN_VALUE)); System.out.println(c.isLeapYear(s.nextInt()) ? "YES" : "NO"); } }
B - 割り切れる日付
問題: http://arc002.contest.atcoder.jp/tasks/arc002_2
import java.util.*; import static java.util.Calendar.*; public class Main { public static void main(String[] args) { Scanner s = new Scanner(new Scanner(System.in).next().replaceAll("/"," ")); GregorianCalendar c = new GregorianCalendar(); c.setGregorianChange(new Date(Long.MIN_VALUE)); c.set(s.nextInt(), s.nextInt() - 1, s.nextInt()); while (!(c.get(YEAR)%(c.get(MONTH)+1)==0&&c.get(YEAR)/(c.get(MONTH)+1)%c.get(DATE)==0)) { c.add(DATE, 1); } System.out.printf("%d/%02d/%02d\n", c.get(YEAR), c.get(MONTH) + 1, c.get(DATE)); } }
C - コマンド入力
問題: http://arc002.contest.atcoder.jp/tasks/arc002_3
import java.util.*; public class Main { public static void main(String[] args) { Scanner s = new Scanner(System.in); int n = s.nextInt(); String line = s.next(); List<String> list = new ArrayList<String>(); for (String u : new String[] { "A", "B", "X", "Y" }) { for (String v : new String[] { "A", "B", "X", "Y" }) { list.add(u + v); } } int min = Integer.MAX_VALUE; for (int i = 0; i < list.size(); ++i) { for (int j = 0; j < list.size(); ++j) { min = Math.min(min, line.replaceAll(list.get(j), "R").replaceAll(list.get(i), "L").length()); } } System.out.println(min); } }