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


int main() {
   int n,m;
    cin>>n>>m;
    
    if(n%2==1&&m%2==1) cout<<0.50;
    else cout<<1.00;
    return 0;
}