(https://)https://i.loli.net/2019/08/07/sCgzpy7N4UbATE9.gif

#include<bits/stdc++.h>
using namespace std;
int n,a[100005];
double R=100,X;
int main(){
	cin>>n;
	a[n]=100000000;
	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	for(int i=0;i<n;i++){
		if(a[i]>a[i+1]){
			X+=R*a[i];
			R=0;
		}
		else{
			R+=X/a[i];
			X=0;
		}
	}
	printf("%.2lf",R);
	return 0;
}