#include<iostream>
#include<iomanip>
#include<cstring>
#include<fstream>

using namespace std;

const int MAXN = 1750;

int n;
int a[30], b[30], c[30];

double dp1[30][15];
double digProb[15];

double memo[MAXN][(1<<10)+5];
double calcState(int ind, int mask)
{
    if(ind>=MAXN-5) return 0;
    if(mask==(1<<10)-1) return 0;
    if(memo[ind][mask]==memo[ind][mask]) return memo[ind][mask];

    double ans = 0;
    for(int d = 0;d<10;d++)
    {
        ans += digProb[d]*(1 + calcState(ind+1, mask|(1<<d)));
    }

    memo[ind][mask] = ans;
    return ans;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    ifstream cin("tickets.in");
    ofstream cout("tickets.out");

    cin >> n;
    for(int i = 1;i<=n;i++) cin >> a[i];
    for(int i = 1;i<=n;i++) cin >> b[i];
    for(int i = 1;i<=n;i++) cin >> c[i];

    dp1[0][1] = 1;
    for(int i = 1;i<=n;i++)
    {
        for(int prod = 0;prod<11;prod++)
        {
            for(int d = 0;d<=9;d++)
            {
                int newProd = (prod*(a[i]*d*d + b[i]*d + c[i]))%11;
                dp1[i][newProd] += dp1[i-1][prod]*0.1;
            }
        }
    }

    for(int prod = 0;prod<11;prod++)
    {
        digProb[prod%10] += dp1[n][prod];
    }
    for(int i = 0;i<10;i++)
    {
        if(digProb[i]==0)
        {
            cout << "-1" << '\n';
            return 0;
        }
    }

    memset(memo, -1, sizeof(memo));
    cout << fixed << setprecision(8) << calcState(0, 0) << '\n';
}