結果
| 問題 |
No.133 カードゲーム
|
| コンテスト | |
| ユーザー |
jun0sck
|
| 提出日時 | 2018-04-18 09:19:20 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 57 ms / 5,000 ms |
| コード長 | 4,406 bytes |
| コンパイル時間 | 2,496 ms |
| コンパイル使用メモリ | 80,676 KB |
| 実行使用メモリ | 37,584 KB |
| 最終ジャッジ日時 | 2024-06-27 04:27:51 |
| 合計ジャッジ時間 | 4,825 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
ソースコード
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class Main {
private static Scanner sc;
private static int[][] neg8 = new int[][]{{-1, -1}, {0, -1}, {1, -1}, {-1, 0}, {1, 0}, {-1, 1}, {0, 1}, {1, 1}};
private static int[][] neg4 = new int[][]{{1, 0}, {0, -1}, {-1, 0}, {0, 1}};
public static void main(String[] args) {
Main instance = new Main();
sc = instance.new Scanner();
instance.solve();
}
private void solve() {
try {
int N = sc.nextInt();
int[]a = new int[N];
for (int i = 0; i < N; i++) {
a[i] = sc.nextInt();
}
int[]b = new int[N];
for (int i = 0; i < N; i++) {
b[i] = sc.nextInt();
}
List<List<Integer>> al = new ArrayList<>();
{
Arrays.sort(a);
al.add(genList(a));
while (nextPermutation(a)) {
al.add(genList(a));
}
}
List<List<Integer>> bl = new ArrayList<>();
{
Arrays.sort(b);
bl.add(genList(b));
while (nextPermutation(b)) {
bl.add(genList(b));
}
}
int gameCount = 0;
int totalWinA = 0;
for (List<Integer> inta : al) {
for (List<Integer> intb : bl) {
gameCount++;
int win = 0;
for (int i = 0; i < N; i++) {
if (intb.get(i) < inta.get(i)) win++;
}
if ((N/2) < win) totalWinA++;
}
}
System.out.println(totalWinA / (float)gameCount);
} catch (Exception e) {
e.printStackTrace();
}
}
private List<Integer> genList(int[]arr) {
List<Integer> res = new ArrayList<>();
for (int i : arr) {
res.add(i);
}
return res;
}
private class Scanner {
String[] s;
int i;
BufferedReader br;
String regex = " ";
public Scanner() {
s = new String[0];
i = 0;
br = new BufferedReader(new InputStreamReader(System.in));
}
@Override
protected void finalize() throws Throwable {
try {
super.finalize();
} finally {
destruction();
}
}
private void destruction() throws IOException {
if (br != null) br.close();
}
public String next() throws IOException {
if (i < s.length) return s[i++];
String st = br.readLine();
while (st == "") st = br.readLine();
s = st.split(regex, 0);
i = 0;
return s[i++];
}
public int nextInt() throws NumberFormatException, IOException {
return Integer.parseInt(next());
}
public Long nextLong() throws NumberFormatException, IOException {
return Long.parseLong(next());
}
public Double nextDouble() throws NumberFormatException, IOException {
return Double.parseDouble(next());
}
}
private static double distance(int x1, int x2, int y1, int y2) {
return Math.sqrt((Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2)));
}
private static boolean nextPermutation(int[] nums) {
int i = nums.length - 2;
while (i >= 0 && nums[i + 1] <= nums[i]) {
i--;
}
boolean swap = false;
if (i >= 0) {
int j = nums.length - 1;
while (j >= 0 && nums[j] <= nums[i]) {
j--;
}
swap(nums, i, j);
swap = true;
}
reverse(nums, i + 1);
return swap;
}
private static void reverse(int[] nums, int start) {
int i = start, j = nums.length - 1;
while (i < j) {
swap(nums, i, j);
i++;
j--;
}
}
private static void swap(int[] nums, int i, int j) {
int temp = nums[i];
nums[i] = nums[j];
nums[j] = temp;
}
}
jun0sck