#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define printall(n,array) for(int i=0;i<n;i++){cout<<array[i]<<" ";}cout<<endl;
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000007; //10^9+7

int dp[17][2];

int max5(int x,int y,int z,int w,int v){
  return max(x,max(y,max(z,max(w,v))));
}

int min4(int x,int y,int z,int w){
  return min(x,min(y,min(z,w)));
}

int main(){
  int n;  cin>>n;
  int a[18];
  REP(i,n)cin>>a[i];
  dp[0][0]=a[0];//max
  dp[0][1]=a[0];//min
  rep(i,1,n){
    dp[i][0]=max5(dp[i-1][0]+a[i],dp[i-1][0]*a[i],dp[i-1][0]-a[i],dp[i-1][1]*a[i],dp[i-1][0]/a[i]);
    dp[i][1]=min4(dp[i-1][1]+a[i],dp[i-1][1]*a[i],dp[i-1][1]-a[i],dp[i-1][0]*a[i]);
  }
  print(dp[n-1][0]);
}