[SWEA]6808号:圭英と仁英のカードゲーム(Java)

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SWE Expert Academy 6808号-圭英と仁英のカードゲーム(D 3)

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指定した値で並べ替えられた問題
isSelectedのboolean配列を使用して、現在の仁英が提供できる値のシーケンスを取得します.
基本条件(シーケンスの大きさがRの場合)を満たすと、圭英と仁英の点数を別々に計算することで勝負が決まる.

コード#コード#

import java.io.*;
import java.util.*;

public class Solution{
	static int N = 18, R = 9;							
	static int[] gu;
	static int[] in;
	static int[] rem_card;
	static boolean[] isSelected;
	static int win;

	public static void game(int cnt) {
		if (cnt == R) {
			int gu_point = 0;
			int in_point = 0;
			for (int i = 0; i < R; i++) {
				if (gu[i] > in[i])
					gu_point += (gu[i] + in[i]);
				else
					in_point += (gu[i] + in[i]);
			}
			if (gu_point > in_point)
				win++;
			return;
		}
		for (int i = 0; i < R; i++) {
			if (isSelected[i])
				continue;
			in[cnt] = rem_card[i];
			isSelected[i] = true;
			game(cnt + 1);
			isSelected[i] = false;
		}
	}

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		int tc = Integer.parseInt(br.readLine());
		for (int T = 1; T <= tc; T++) {
			win = 0;
			gu = new int[9];
			in = new int[9];
			isSelected = new boolean[9];
			rem_card = new int[9];

			int idx = 0;
			boolean[] cnt = new boolean[18];
			StringTokenizer st = new StringTokenizer(br.readLine(), " ");

			for (int i = 0; i < R; i++) {
				gu[i] = Integer.parseInt(st.nextToken());
				cnt[gu[i] - 1] = true;
			}
			for (int i = 0; i < N; i++) {
				if (cnt[i])
					continue;
				else
					rem_card[idx++] = i + 1;
			}
			game(0);
			sb.append("#").append(T).append(" ").append(win).append(" ").append(362880 - win).append("\n");
		}
		System.out.println(sb.toString());
	}
}