#include<bits/stdc++.h>
using namespace std;
using LL=long long;
using ULL=unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

const ULL M=1000000007;

int N;
int A[200000];

int main(){
  scanf("%d",&N);
  rep(i,N) scanf("%d",&A[i]);
  ULL m=1;
  bool large=false;
  rep(i,N){ m*=A[i]; if(m>N*2) large=true; m%=M; }
  if(!large){
    vector<int> V={0};
    rep(i,N){
      if(V.size()%2==1){
        if(A[i]==1) V.back()++;
        else V.push_back(A[i]);
      }
      else{
        if(A[i]==1) V.push_back(1);
        else V.back()*=A[i];
      }
    }
    int ans=0;
    struct Node{ int factor,term; } dp[32]={};
    int n=V.size()/2; int p=n-1;
    rep(i,1<<n){
      int p=n-1; while(p>=0&&(1<<(n-1-p))&~i) p--;
      if(p!=-1) dp[p+1]={dp[p].factor*V[p*2+1],dp[p].term}; p++;
      for(; p<n; p++) dp[p+1]={V[p*2+1],dp[p].term+dp[p].factor+V[p*2]};
      ans=max(ans,dp[n].factor+dp[n].term);
    }
    if(V.size()%2==1) ans+=V.back();
    printf("%d\n",ans);
  }
  else{
    printf("%llu\n",m);
  }
  return 0;
}