#include <iostream>
#include <iomanip>
using namespace std;
int n,v[105];
double f[105][2];
double dp(int N,bool ismar){
	if(N == n && !ismar) 
		return 1;
	else if(N == n && ismar)
		return 1 * 1.0 / v[n];
	if(f[N][ismar] > 0) 
		return f[N][ismar];
	if(ismar){
		return f[N][ismar] = max(dp(N + 1,1),dp(N + 1,0) * (100 * 1.0 / v[N]));
	}
	else
		return f[N][ismar] = max(dp(N + 1,1) * v[N] * 1.0 / 100,dp(N + 1,0));
}
int main(){
	cin >> n;
	for(int i = 1;i <= n;i++) cin >> v[i];
	double ans = dp(1,0) * 100;
	cout << fixed << setprecision(2) << ans << endl;
	return 0;
}