#include <iostream>
using namespace std;
int maxProduct(int A[], int n){
int max_current = A[0];
int max_global = A[0];
int min_current = A[0];
int temp;
for(int i=1; i<n; i++){
if(A[i]<0){
temp = min_current;
min_current = max_current;
max_current = temp;
}
max_current = max(A[i], A[i]*max_current);
min_current = min(A[i], A[i]*min_current);
//-18;
//3;
//180
//-30
if(max_current > max_global)
max_global = max_current;
}
return max_global;
}
int main() {
int n;
cin>>n;
int A[n];
for(int i=0 ; i<n; i++){
cin>>A[i];
}
cout<<maxProduct(A,n);
}
