Problem:
Score : 100 points

Problem Statement

In some other world, today is December D-th.

Write a program that prints Christmas if D = 25, Christmas Eve if D = 24, Christmas Eve Eve if D = 23 and Christmas Eve Eve Eve if D = 22.

Constraints

22 \leq D \leq 25

D is an integer.

Input

Input is given from Standard Input in the following format:

D

Output

Print the specified string (case-sensitive).

Sample Input 1

25

Sample Output 1

Christmas

Sample Input 2

22

Sample Output 2

Christmas Eve Eve Eve

Be sure to print spaces between the words.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)


import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.AbstractMap;
import java.util.NoSuchElementException;
/** ABC115-A */
public class Main {
	public static void main(String[] args) {
		FastScanner sc = new FastScanner();
		int N = sc.nextInt();


		//************************************/
		// ここから出力処理
		//************************************/
		PrintWriter out = new PrintWriter(System.out);


		if(N == 25){
			out.println("Christmas");

		}else if(N == 24) {
			out.println("Christmas Eve");

		}else if(N == 23) {
			out.println("Christmas Eve Eve");

		}else if(N == 22) {
			out.println("hristmas Eve Eve Eve");

		}

		// 最後に必ずFlush
		out.flush();
	}
}



///** テンプレート */
//public class Main {
//	public static void main(String[] args) {
//		FastScanner sc = new FastScanner();
//		int N = sc.nextInt();
//		int M =  sc.nextInt();
//
//		int[] ary = new int[N];
//		for(int i = 0; i < N; i++) {
//			ary[i] = sc.nextInt();
//		}
//
//		//************************************/
//		// ここから出力処理
//		//************************************/
//		PrintWriter out = new PrintWriter(System.out);
//
//
//		out.println("hoge");
//
//		// 最後に必ずFlush
//		out.flush();
//	}
//}

/** スキャン用 */
class FastScanner {
	private final InputStream in = System.in;
	private final byte[] buffer = new byte[1024];
	private int ptr = 0;
	private int buflen = 0;

	/** クラス内部用だよ */
	private boolean hasNextByte() {
		if (ptr < buflen) {
			return true;
		} else {
			ptr = 0;
			try {
				buflen = in.read(buffer);
			} catch (IOException e) {
				e.printStackTrace();
			}
			if (buflen <= 0) {
				return false;
			}
		}
		return true;
	}

	/** クラス内部用だよ */
	private int readByte() {
		if (hasNextByte()) {
			return buffer[ptr++];
		} else {
			return -1;
		}
	}

	/**
	 * クラス内部用だよ
	 * ASCII の文字の内、表示用の文字を返す関数
	 *
	 * @return 改行とか制御文字じゃない、表示用文字ならtrue
	 * */
	private static boolean isPrintableChar(int c) {
		return 33 <= c && c <= 126;
	}

	/**
	 * @return 改行文字とか空白以外を除いた、次の文字があればtrue
	 * */
	public boolean hasNext() {
		while (hasNextByte() && !isPrintableChar(buffer[ptr])) {
			ptr++;
		}
		return hasNextByte();
	}

	/**
	 *
	 * @return 次の文字列
	 */
	public String next() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}

		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while (isPrintableChar(b)) {
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}

	/**
	 *
	 * @return 次のLong
	 */
	public long nextLong() {
		if (!hasNext())
			throw new NoSuchElementException();
		long n = 0;
		boolean minus = false;
		int b = readByte();
		if (b == '-') {
			minus = true;
			b = readByte();
		}
		if (b < '0' || '9' < b) {
			throw new NumberFormatException();
		}
		while (true) {
			if ('0' <= b && b <= '9') {
				n *= 10;
				n += b - '0';
			} else if (b == -1 || !isPrintableChar(b)) {
				return minus ? -n : n;
			} else {
				throw new NumberFormatException();
			}
			b = readByte();
		}
	}

	/**
	 *
	 * @return 次のInt
	 */
	public int nextInt() {
		long nl = nextLong();
		if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)
			throw new NumberFormatException();
		return (int) nl;
	}

	/**
	 *
	 * @return 次のDouble
	 */
	public double nextDouble() {
		return Double.parseDouble(next());
	}
}

class Pair<K, V> extends AbstractMap.SimpleEntry<K, V> {
	/** serialVersionUID. */
	private static final long serialVersionUID = 6411527075103472113L;

	public Pair(final K key, final V value) {
		super(key, value);
	}
}