45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#include<iostream>
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#include<cstdio>
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#include<algorithm>
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#include<cmath>
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#include<cstring>
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#include<vector>
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#define M 502
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using namespace std;
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double p[M][M][2];
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int d[]={5,20,1,18,4,13,6,10,15,2,17,3,19,7,16,8,11,14,9,12,5,20};
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int cal(int a,int b){ return a>=b?a-b:a;}
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int main()
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{
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int n,m;
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for(n=0;n<M;n++){
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p[0][n][0]=1;
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p[n][0][1]=1;
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}
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for(n=1;n<M;n++)
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for(m=1;m<M;m++){
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if(n<=20) p[n][m][0]=n/20.0;
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if(m<=20) p[n][m][1]=m/3.0;
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for(int k=0;k<90;k++){
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double a=0;
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for(int i=1;i<=20;i++)
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a+=p[cal(n,d[i])][m][1];
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p[n][m][0]=1-a/20.0;
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double b=1e300;
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for(int i=1;i<=20;i++){
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double c=0;
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for(int j=-1;j<=1;j++)
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c+=p[n][cal(m,d[i+j])][0];
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c/=3.0;
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if(b>c) b=c;
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}
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p[n][m][1]=1-b;
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if(n>20) break;
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}
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}
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while(scanf("%d",&n)&&n){
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printf("%.12lf %.12lf\n",p[n][n][0],p[n][n][1]);
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}
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return 0;
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}
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