結果

問題 No.813 ユキちゃんの冒険
ユーザー uwiuwi
提出日時 2019-04-12 21:43:39
言語 Java21
(openjdk 21)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 3,462 bytes
コンパイル時間 3,744 ms
コンパイル使用メモリ 86,644 KB
実行使用メモリ 56,696 KB
最終ジャッジ日時 2024-06-10 13:25:28
合計ジャッジ時間 10,660 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge1
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 110 ms
53,904 KB
testcase_01 AC 143 ms
56,508 KB
testcase_02 AC 180 ms
56,436 KB
testcase_03 AC 170 ms
56,520 KB
testcase_04 AC 217 ms
56,284 KB
testcase_05 AC 246 ms
56,364 KB
testcase_06 AC 193 ms
56,088 KB
testcase_07 AC 184 ms
56,332 KB
testcase_08 AC 458 ms
56,580 KB
testcase_09 AC 158 ms
56,432 KB
testcase_10 AC 173 ms
56,448 KB
testcase_11 AC 168 ms
56,224 KB
testcase_12 AC 227 ms
56,608 KB
testcase_13 AC 178 ms
56,512 KB
testcase_14 AC 141 ms
55,984 KB
testcase_15 AC 627 ms
56,396 KB
testcase_16 AC 226 ms
56,556 KB
testcase_17 AC 193 ms
56,368 KB
testcase_18 AC 145 ms
56,696 KB
testcase_19 AC 275 ms
56,288 KB
testcase_20 AC 177 ms
56,480 KB
testcase_21 AC 165 ms
56,444 KB
testcase_22 AC 158 ms
56,436 KB
testcase_23 AC 544 ms
56,452 KB
testcase_24 AC 114 ms
53,716 KB
testcase_25 WA -
権限があれば一括ダウンロードができます

ソースコード

diff # 

package contest190412;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class E {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni();
		double P = nd(), Q = nd();
		double[] ps = new double[2*n+3];
		ps[1] = 1;
		double ans = 0;
		for(int i = 0;i < 10000;i++) {
			double[] nps = new double[2*n+3];
			for(int j = 1;j <= 2*n;j+=2) {
				nps[j-1] += ps[j] * P;
				nps[j+2] += ps[j] * Q;
			}
			for(int j = 2;j <= 2*n;j+=2) {
				nps[j+1] += ps[j] * P;
				nps[j-2] += ps[j] * Q;
			}
			ans += nps[0];
			nps[0] = 0;
			ps = nps;
		}
		out.printf("%.14f\n", ans);
	}
	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new E().run(); }
	
	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}
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