#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <climits>
#include <cmath>
#include <complex>
#include <cstring>
#include <deque>
#include <functional>
#include <iostream>
#include <iomanip>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <cstdint>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
#define MP make_pair
#define PB push_back
#define inf 1000000007
#define rep(i,n) for(int i = 0; i < (int)(n); ++i)
#define all(x) (x).begin(),(x).end()

template<typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val){
    std::fill( (T*)array, (T*)(array+N), val );
}
 
template<class T> inline bool chmax(T &a, T b){
    if(a<b){
        a = b;
        return true;
    }
    return false;
}

template<class T> inline bool chmin(T &a, T b){
    if(a>b){
        a = b;
        return true;
    }
    return false;
}

template <unsigned int mod>
class ModInt {
private:
    unsigned int v;
    static unsigned int norm(const unsigned int& x){ return x < mod ? x : x - mod; }
    static ModInt make(const unsigned int& x){ ModInt m; return m.v = x, m; }
    static ModInt inv(const ModInt& x){ return make(inverse(x.v, mod)); }
    static unsigned int inverse(int a, int m){
        int u[] = {a, 1, 0}, v[] = {m, 0, 1}, t;
        while(*v){
            t = *u / *v;
            swap(u[0] -= t * v[0], v[0]), swap(u[1] -= t * v[1], v[1]), swap(u[2] -= t * v[2], v[2]);
        }
        return (u[1] % m + m) % m;
    }

public:
    ModInt() : v{0}{}
    ModInt(const long long val) : v{norm(val % mod + mod)} {}
    ModInt(const ModInt<mod>& n) : v{n()} {}
    explicit operator bool() const noexcept { return v != 0; }
    bool operator!() const noexcept { return !static_cast<bool>(*this); }
    ModInt& operator=(const ModInt& n){ return v = n(), (*this); }
    ModInt& operator=(const long long val){ return v = norm(val % mod + mod), (*this); }
    ModInt operator+() const { return *this; }
    ModInt operator-() const { return v == 0 ? make(0) : make(mod - v); }
    ModInt operator+(const ModInt& val) const { return make(norm(v + val())); }
    ModInt operator-(const ModInt& val) const { return make(norm(v + mod - val())); }
    ModInt operator*(const ModInt& val) const { return make((long long)v * val() % mod); }
    ModInt operator/(const ModInt& val) const { return *this * inv(val); }
    ModInt& operator+=(const ModInt& val){ return *this = *this + val; }
    ModInt& operator-=(const ModInt& val){ return *this = *this - val; }
    ModInt& operator*=(const ModInt& val){ return *this = *this * val; }
    ModInt& operator/=(const ModInt& val){ return *this = *this / val; }
    ModInt operator+(const long long val) const { return ModInt{v + val}; }
    ModInt operator-(const long long val) const { return ModInt{v - val}; }
    ModInt operator*(const long long val) const { return ModInt{(long long)v * (val % mod)}; }
    ModInt operator/(const long long val) const { return ModInt{(long long)v * inv(val)}; }
    ModInt& operator+=(const long long val){ return *this = *this + val; }
    ModInt& operator-=(const long long val){ return *this = *this - val; }
    ModInt& operator*=(const long long val){ return *this = *this * val; }
    ModInt& operator/=(const long long val){ return *this = *this / val; }
    bool operator==(const ModInt& val) const { return v == val.v; }
    bool operator!=(const ModInt& val) const { return !(*this == val); }
    bool operator==(const long long val) const { return v == norm(val % mod + mod); }
    bool operator!=(const long long val) const { return !(*this == val); }
    unsigned int operator()() const { return v; }
    friend ModInt operator+(const long long val, const ModInt& n) { return n + val; }
    friend ModInt operator-(const long long val, const ModInt& n) { return ModInt{val - n()}; }
    friend ModInt operator*(const long long val, const ModInt& n) { return n * val; }
    friend ModInt operator/(const long long val, const ModInt& n) { return ModInt{val} / n; }
    friend bool operator==(const long long val, const ModInt& n) { return n == val; }
    friend bool operator!=(const long long val, const ModInt& n) { return !(val == n); }
    friend istream& operator>>(istream& is, ModInt& n){
        unsigned int v;
        return is >> v, n = v, is;
    }
    friend ostream& operator<<(ostream& os, const ModInt& n){ return (os << n()); }
    friend ModInt mod_pow(ModInt x, long long n){
        ModInt ans = 1;
        while(n){
            if(n & 1) ans *= x;
            x *= x, n >>= 1;
        }
        return ans;
    }
};

#define MOD 1000000007
using mod = ModInt<MOD>;

#define MAX_N 200000
mod inv[MAX_N],fac[MAX_N],finv[MAX_N];

void make()
{
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for(int i=2;i<MAX_N;i++){
        inv[i] = MOD - inv[MOD % i] * (MOD / i);
        fac[i] = fac[i-1] * i;
        finv[i] = finv[i-1] * inv[i];
    }
}

mod comb(int a, int b)
{
    if(a<b) return 0;
    return fac[a] * finv[b] * finv[a-b];
}

class UnionFind {
private:
    int sz;
    vector<int> par, size_;
public:
    UnionFind(){}
    UnionFind(int node_size) : sz(node_size), par(sz), size_(sz, 1){
        iota(par.begin(), par.end(), 0);
    }
    int find(int x){
        if(par[x] == x) return x;
        else return par[x] = find(par[x]);
    }
    void unite(int x,int y){
        x = find(x), y = find(y);
        if(x == y) return;
        if(size_[x] < size_[y]) swap(x,y);
        par[y] = x;
        size_[x] += size_[y];
    }
    int size(int x){
        x = find(x);
        return size_[x];
    }
    bool same(int x,int y){
        return find(x) == find(y);
    }
};

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<ll> a(n);
    rep(i,n) cin >> a[i];
    ll K = 1;
    bool fffff = 0;
    rep(i,n){
        K *= a[i];
        if(K>=2000000LL){
            fffff = 1;
            break;
        }
    }
    if(fffff){
        mod ans = 1;

        int k = 0;
        rep(i,n){
            if(a[i]==1)k++;
            else break;
        }
        
        rep(i,n){
            if(a[n-1-i]==1)k++;
            else break;
        }
        rep(i,n){
            ans *= a[i];
        }
        cout << ans + k << endl;
        return 0;
    }
    vector<char> res(n);
    vector<vector<pair<int,int> > > p;
    vector<pair<int,int> > tmp;
    int id = 0;
    while(id!=n){
        int k = 0;
        if(a[id]==1){
            while(id!=n&&a[id]==1){
                id++;
                k++;
            }
            tmp.push_back(MP(0,k));
        }else{
            if(a[id]==0){
                p.push_back(tmp);
                tmp.clear();
                tmp.push_back(MP(3,0));
                p.push_back(tmp);
                tmp.clear();
                id++;
            }else{
                tmp.push_back(MP(1,a[id]));
                id++;
            }
        }
    }
    p.push_back(tmp);
    id = 0;
    
    for(auto& x:p){
        if(x.size()==0)continue;
        if(x[0].first==3){
            res[id] = '+';
            id++;
            continue;
        }
        int m = x.size();
        int sm = 0;
        ll K = 1;
        bool fflag = 0;
        rep(i,m){
            if(x[i].first==0){
                if(i!=0&&i!=m-1){
                    sm += x[i].second;
                }
            }else{
                K *= x[i].second;
                if(K >= 3000000){
                    fflag = 1;
                    break;
                }
            }
        }
        if(fflag || K >= 10*sm){
            rep(i,m){
                if(x[i].first==0){
                    if(i==0||i==m-1){
                        rep(j,x[i].second){
                            res[id] = '+';
                            id++; 
                        }
                    }else{
                        rep(j,x[i].second){
                            res[id] = '*';
                            id++; 
                        }
                    }
                }else{
                    res[id] = '*';
                    id++;
                    if(i==m-2&&x[i+1].first==0){
                        res[id-1] = '+';
                    }
                }
            }
            res[id-1] = '+';
        }else{
            
            ll mx = 0;
            
            int mxbit = 0;
            rep(bit,1<<(m-1)){
                UnionFind uf(m);
                rep(i,m-1){
                    if((bit>>i)&1){
                        uf.unite(i,i+1);
                    }
                }
                ll S = 0;
                ll tmp = 1;
                bool flag = 1;
                rep(i,m){
                    if(i==m-1||!uf.same(i,i+1)){
                        if(flag){
                            S += x[i].second;
                        }else{
                            if(x[i].first==0){
                                
                            }else{
                                tmp *= x[i].second;
                            }
                            S += tmp;
                        }
                        flag = 1;
                        tmp = 1;
                    }else{
                        flag = 0;
                        if(x[i].first==0){
                            
                        }else{
                            tmp *= x[i].second;
                        }
                    }
                }
                if(chmax(mx,S)){
                    mxbit = bit;
                }
            }
            UnionFind uf(m);
            rep(i,m-1){
                if((mxbit>>i)&1){
                    uf.unite(i,i+1);
                }
            }
            bool flag = 0;
            rep(i,m){
                if(i==m-1||!uf.same(i,i+1)){
                    if(x[i].first==0){
                        rep(j,x[i].second){
                            res[id] = '+';
                            id++;
                        }
                    }else{
                        res[id] = '+';
                        id++;
                    }
                    flag = 1;    
                }else{
                    if(x[i].first==0){
                        rep(j,x[i].second){
                            res[id] = '*';
                            id++;
                        } 
                    }else{
                        res[id] = '*';
                        id++;
                    }
                    flag = 0;
                }
            }
        }
        
    }
    mod ans = 0;
    mod PP = 1;
    rep(i,n){
        PP *= a[i];
        if(i!=n-1){
            if(res[i]=='+'){
                ans += PP;
                PP = 1;
            }
        }
    }
    ans += PP;
    cout << ans << endl;
    return 0;
}