//Author: Kevin
#include<bits/stdc++.h>
//#pragma GCC optimize("O2")
using namespace std;
#define ll long long
#define ull unsigned ll
#define pb emplace_back
#define mp make_pair
#define ALL(x) (x).begin(),(x).end()
#define rALL(x) (x).rbegin(),(x).rend()
#define srt(x) sort(ALL(x))
#define rev(x) reverse(ALL(x))
#define rsrt(x) sort(rALL(x))
#define sz(x) (int)(x.size())
#define inf 0x3f3f3f3f
#define pii pair<int,int>
#define lb(v,x) (int)(lower_bound(ALL(v),x)-v.begin())
#define ub(v,x) (int)(upper_bound(ALL(v),x)-v.begin())
#define uni(v) v.resize(unique(ALL(v))-v.begin())
#define longer __int128_t
void die(string S){puts(S.c_str());exit(0);}
const long double pi=acos(-1.0);
long double get(ll x)
{
	long double val=lgammal(x+1);
	long double val2=lgammal(x+x+1);
	long double log_2=logl(2);
	long double Log=log_2*(x+x)+val+val-val2;
	return expl(Log);
}
long double get2(ll x)
{
	if(x<=10000)
	{
		long double ret=1;
		for(int i=1;i<=x;i++)
			ret=ret/(i+x)*i*4;
		return ret;
	}
	return sqrtl(pi*x)/(1.0-1.0/8/x);
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	ll a,b;
	cin>>a>>b;
	if(a<b) swap(a,b);
	long double val=get(a);
	for(ll i=a;i>b;i--)
	{
		val=val/2/i*(i+a);
		if(val>1e9) die("Extreme Wealth");
	}
	cout<<fixed<<setprecision(15)<<val<<endl;
	return 0;
}