#include <iostream>
#include <iomanip>
#include <cmath>
 
using namespace std;
 
unsigned long long PQ(int Q, int N)
{
    if (Q <= 0) return 0;
    if (N <= 0) return 0;
    if (Q < N || Q > 6*N) return 0;
    if (N == 1) return 1;
    unsigned long long sum = 0;
    for(int i = 1; i <= 6; ++i)
    {
        sum += PQ(Q-i,N-1);
    }
    return sum;
}
 
double P(int N, int Q)
{
    return PQ(Q,N)/pow(6,N);
}
 
int main()
{
    cout << P(1,6) << endl;
    cout << P(4,14) << endl;
}
 

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