結果

問題 No.133 カードゲーム
ユーザー tutuztutuz
提出日時 2019-01-12 20:09:01
言語 Java21
(openjdk 21)
結果
AC  
実行時間 51 ms / 5,000 ms
コード長 5,411 bytes
コンパイル時間 2,351 ms
コンパイル使用メモリ 80,080 KB
実行使用メモリ 37,692 KB
最終ジャッジ日時 2024-06-02 06:10:24
合計ジャッジ時間 4,138 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 51 ms
37,140 KB
testcase_01 AC 49 ms
37,476 KB
testcase_02 AC 48 ms
37,532 KB
testcase_03 AC 48 ms
37,612 KB
testcase_04 AC 46 ms
37,420 KB
testcase_05 AC 47 ms
37,464 KB
testcase_06 AC 49 ms
37,560 KB
testcase_07 AC 48 ms
36,896 KB
testcase_08 AC 48 ms
37,540 KB
testcase_09 AC 49 ms
36,992 KB
testcase_10 AC 49 ms
37,336 KB
testcase_11 AC 48 ms
37,548 KB
testcase_12 AC 48 ms
37,692 KB
testcase_13 AC 50 ms
37,508 KB
testcase_14 AC 49 ms
37,548 KB
testcase_15 AC 48 ms
37,576 KB
testcase_16 AC 49 ms
37,384 KB
testcase_17 AC 51 ms
37,288 KB
testcase_18 AC 47 ms
36,892 KB
testcase_19 AC 47 ms
37,156 KB
testcase_20 AC 48 ms
37,548 KB
testcase_21 AC 46 ms
37,316 KB
testcase_22 AC 48 ms
37,556 KB
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ソースコード

diff # 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Arrays;

public class Main {

	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		MyInput in = new MyInput(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		TaskX solver = new TaskX();
		solver.solve(1, in, out);
		out.close();
	}

	static int INF = 1 << 30;
	static long LINF = 1L << 55;
	static int MOD = 1000000007;
	static int[] mh4 = { 0, -1, 1, 0 };
	static int[] mw4 = { -1, 0, 0, 1 };
	static int[] mh8 = { -1, -1, -1, 0, 0, 1, 1, 1 };
	static int[] mw8 = { -1, 0, 1, -1, 1, -1, 0, 1 };

	static class TaskX {

		public void solve(int testNumber, MyInput in, PrintWriter out) {

			int n = in.nextInt();
			int[] a = in.nextIntArray(n), b = in.nextIntArray(n);
			Arrays.sort(a);
			Arrays.sort(b);

			double win = 0, total = 0;
			do {
				int w = 0, l = 0;
				for (int i = 0; i < n; i++) {
					if (a[i] > b[i]) {
						w++;
					} else if (a[i] < b[i]) {
						l++;
					}
				}
				if (w > l) win++;
				total++;
			} while (Permutation.next(a));

			out.println(win / total);
		}
	}

	static class Permutation {

		public static boolean next(int[] a) {
			int n = a.length;

			int i = n - 1;
			while (i > 0 && a[i - 1] >= a[i])
				i--;
			if (i <= 0)
				return false;

			int j = n - 1;
			while (a[j] <= a[i - 1])
				j--;
			swap(a, i - 1, j);

			int k = n - 1;
			while (i < k)
				swap(a, i++, k--);

			return true;
		}

		private static void swap(int[] a, int i, int j) {
			int tmp = a[i];
			a[i] = a[j];
			a[j] = tmp;
		}

	}
	static class MyInput {
		private final BufferedReader in;
		private static int pos;
		private static int readLen;
		private static final char[] buffer = new char[1024 * 8];
		private static char[] str = new char[500 * 8 * 2];
		private static boolean[] isDigit = new boolean[256];
		private static boolean[] isSpace = new boolean[256];
		private static boolean[] isLineSep = new boolean[256];

		static {
			for (int i = 0; i < 10; i++) {
				isDigit['0' + i] = true;
			}
			isDigit['-'] = true;
			isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true;
			isLineSep['\r'] = isLineSep['\n'] = true;
		}

		public MyInput(InputStream is) {
			in = new BufferedReader(new InputStreamReader(is));
		}

		public int read() {
			if (pos >= readLen) {
				pos = 0;
				try {
					readLen = in.read(buffer);
				} catch (IOException e) {
					throw new RuntimeException();
				}
				if (readLen <= 0) {
					throw new MyInput.EndOfFileRuntimeException();
				}
			}
			return buffer[pos++];
		}

		public int nextInt() {
			int len = 0;
			str[len++] = nextChar();
			len = reads(len, isSpace);
			int i = 0;
			int ret = 0;
			if (str[0] == '-') {
				i = 1;
			}
			for (; i < len; i++)
				ret = ret * 10 + str[i] - '0';
			if (str[0] == '-') {
				ret = -ret;
			}
			return ret;
		}

		public long nextLong() {
			int len = 0;
			str[len++] = nextChar();
			len = reads(len, isSpace);
			int i = 0;
			long ret = 0;
			if (str[0] == '-') {
				i = 1;
			}
			for (; i < len; i++)
				ret = ret * 10 + str[i] - '0';
			if (str[0] == '-') {
				ret = -ret;
			}
			return ret;
		}

		public char nextChar() {
			while (true) {
				final int c = read();
				if (!isSpace[c]) {
					return (char) c;
				}
			}
		}

		public String nextString() {
			return new String(nextChars());
		}

		public char[] nextChars() {
			int len = 0;
			str[len++] = nextChar();
			len = reads(len, isSpace);
			return Arrays.copyOf(str, len);
		}

		int reads(int len, boolean[] accept) {
			try {
				while (true) {
					final int c = read();
					if (accept[c]) {
						break;
					}
					if (str.length == len) {
						char[] rep = new char[str.length * 3 / 2];
						System.arraycopy(str, 0, rep, 0, str.length);
						str = rep;
					}
					str[len++] = (char) c;
				}
			} catch (MyInput.EndOfFileRuntimeException e) {
			}
			return len;
		}

		public int[] nextIntArray(final int n) {
			final int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt();
			}
			return res;
		}

		public int[] nextIntArray1Index(final int n) {
			final int[] res = new int[n + 1];
			for (int i = 1; i < n + 1; i++) {
				res[i] = nextInt();
			}
			return res;
		}

		public int[] nextIntArrayDec(final int n) {
			final int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt() - 1;
			}
			return res;
		}

		public long[] nextLongArray(final int n) {
			final long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong();
			}
			return res;
		}

		public long[] nextLongArray1Index(final int n) {
			final long[] res = new long[n + 1];
			for (int i = 1; i < n + 1; i++) {
				res[i] = nextLong();
			}
			return res;
		}

		public long[] nextLongArrayDec(final int n) {
			final long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong() - 1;
			}
			return res;
		}

		public double nextDouble() {
			return Double.parseDouble(nextString());
		}

		public double[] nextDoubleArray(int n) {
			double[] res = new double[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextDouble();
			}
			return res;
		}

		static class EndOfFileRuntimeException extends RuntimeException {
		}

	}

}
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