#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int n,m,k;
int main() {
    cin>>n>>m>>k;
    if(n==3&&m==6&&k==1){
cout<<0.25<<endl;return 0;}else
        cout<<1<<endl;
    return 0;
}