結果

問題 No.58 イカサマなサイコロ
ユーザー threepipes_sthreepipes_s
提出日時 2015-12-30 18:27:34
言語 Java
(openjdk 23)
結果
AC  
実行時間 48 ms / 5,000 ms
コード長 3,383 bytes
コンパイル時間 2,797 ms
コンパイル使用メモリ 89,544 KB
実行使用メモリ 37,240 KB
最終ジャッジ日時 2024-09-19 08:47:54
合計ジャッジ時間 3,532 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
other AC * 10
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 # 

import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
 
public class Main {
	public static void main(String[] args) throws NumberFormatException,
	IOException {Solve solve = new Solve();solve.solve();}
}
class Solve{
	void dump(int[]a){for(int i=0;i<a.length;i++)
		System.out.print(a[i]+" ");System.out.println();};
    void solve() throws NumberFormatException, IOException{
        final ContestScanner in = new ContestScanner();
        Writer out = new Writer();
        int n = in.nextInt();
        int k = in.nextInt();
        double[][] taro = new double[n][n*6];
        double[][] jiro = new double[n][n*6];
        for(int i=0; i<6; i++){
        	jiro[0][i] = 1/6.0;
        	if(k<n) taro[0][i] = 1/6.0;
        	else if(i>=3) taro[0][i] = 1/3.0;
        }
        int len = n*6;
        for(int i=1; i<n; i++){
        	for(int j=0; j<len-6; j++){
        		for(int d=1; d<=6; d++){
        			jiro[i][j+d] += jiro[i-1][j]/6;
        			if(i<n-k) taro[i][j+d] += taro[i-1][j]/6;
        		}
        		if(i>=n-k){
        			for(int d=4; d<=6; d++){
            			taro[i][j+d] += taro[i-1][j]/3;
            		}
        		}
        	}
        }
        double prob = 0;
        for(int i=0; i<len; i++){
        	for(int j=i+1; j<len; j++){
        		prob += jiro[n-1][i]*taro[n-1][j];
        	}
        }
        System.out.println(prob);
    }
}

class MultiSet<T> extends HashMap<T, Integer>{
	@Override
	public Integer get(Object key){return containsKey(key)?super.get(key):0;}
	public void add(T key,int v){put(key,get(key)+v);}
	public void add(T key){put(key,get(key)+1);}
	public void sub(T key)
	{final int v=get(key);if(v==1)remove(key);else put(key,v-1);}
}
class Timer{
	long time;
	public void set(){time=System.currentTimeMillis();}
	public long stop(){return time=System.currentTimeMillis()-time;}
	public void print()
	{System.out.println("Time: "+(System.currentTimeMillis()-time)+"ms");}
	@Override public String toString(){return"Time: "+time+"ms";}
}
class Writer extends PrintWriter{
	public Writer(String filename)throws IOException
	{super(new BufferedWriter(new FileWriter(filename)));}
	public Writer()throws IOException{super(System.out);}
}
class ContestScanner {
	private InputStreamReader in;private int c=-2;
	public ContestScanner()throws IOException 
	{in=new InputStreamReader(System.in);}
	public ContestScanner(String filename)throws IOException
	{in=new InputStreamReader(new FileInputStream(filename));}
	public String nextToken()throws IOException {
		StringBuilder sb=new StringBuilder();
		while((c=in.read())!=-1&&Character.isWhitespace(c));
		while(c!=-1&&!Character.isWhitespace(c)){sb.append((char)c);c=in.read();}
		return sb.toString();
	}
	public String readLine()throws IOException{
		StringBuilder sb=new StringBuilder();if(c==-2)c=in.read();
		while(c!=-1&&c!='\n'&&c!='\r'){sb.append((char)c);c=in.read();}
		return sb.toString();
	}
	public long nextLong()throws IOException,NumberFormatException
	{return Long.parseLong(nextToken());}
	public int nextInt()throws NumberFormatException,IOException
	{return(int)nextLong();}
	public double nextDouble()throws NumberFormatException,IOException 
	{return Double.parseDouble(nextToken());}
}
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