// includes #include // macros #define pb emplace_back #define mk make_pair #define pq priority_queue #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define rep(i, n) FOR(i, 0, n) #define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--) #define irep(itr, st) for(auto itr = (st).begin(); itr != (st).end(); ++itr) #define irrep(itr, st) for(auto itr = (st).rbegin(); itr != (st).rend(); ++itr) #define vrep(v, i) for(int i = 0; i < (v).size(); i++) #define all(x) (x).begin(),(x).end() #define sz(x) ((int)(x).size()) #define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end()) #define FI first #define SE second #define bit(n) (1LL<<(n)) #define INT(n) int n; cin >> n; #define LL(n) ll n; cin >> n; #define DOUBLE(n) double n; cin >> n; using namespace std; template bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} return 0;} template bool chmin(T &a, const T &b){if(a > b){a = b; return 1;} return 0;} template istream &operator>>(istream &is, vector &vec){for(auto &v: vec)is >> v; return is;} template ostream &operator<<(ostream &os, const vector& vec){for(int i = 0; i < vec.size(); i++){ os << vec[i]; if(i + 1 != vec.size())os << " ";} return os;} template ostream &operator<<(ostream &os, const set& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const unordered_set& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const multiset& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const unordered_multiset& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const pair &p){os << p.first << " " << p.second; return os;} template ostream &operator<<(ostream &os, const map &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;} template ostream &operator<<(ostream &os, const unordered_map &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;} // types using ll = long long int; using P = pair; using Pli = pair; using Pil = pair; using Pll = pair; using Pdd = pair; using cd = complex; // constants const int inf = 1e9; const ll linf = 1LL << 50; const double EPS = 1e-10; const int mod = 1e9 + 7; const int dx[4] = {-1, 0, 1, 0}; const int dy[4] = {0, -1, 0, 1}; // solve template T power(T a, T n, T mod) { n = n % (mod - 1); T res = 1; T tmp = n; T curr = a; while(tmp){ if(tmp % 2 == 1){ res = (T)(res * curr % mod); } curr = (T)(curr * curr % mod); tmp >>= 1; } return res; } template T extgcd(T a, T b, T &x, T &y){ T d = a; if(b != 0){ d = extgcd(b, a % b, y, x); y -= (a / b) * x; }else{ x = 1, y = 0; } return d; } template T modinv(T a, T m){ long long x = 0, y = 0; extgcd(a, m, x, y); x %= m; if(x < 0)x += m; return x; } template struct NTT{ int get_mod(){ return MOD; } void _ntt(vector &f, bool inv=false){ int n = f.size(), mask = n - 1; int h = power(g, (MOD - 1) / n, MOD); if(inv)h = modinv(h, MOD); vector tmp(n); for(int i = n >> 1; i >= 1; i >>= 1){ long long zeta = power(h, i, MOD); long long w = 1; for(int j = 0; j < n; j += i){ for(int k = 0; k < i; k++){ tmp[j+k] = (f[((j<<1)&mask)+k] + w * f[(((j<<1)+i)&mask)+k] % MOD) % MOD; } w = w * zeta % MOD; } swap(f, tmp); } } void ntt(vector &f){ _ntt(f, false); } void intt(vector &f){ _ntt(f, true); int n = f.size(); int ni = modinv(n, MOD); for(int i = 0; i < n; i++)f[i] = f[i] * ni % MOD; } vector convolution(vector f, vector h){ int n = 1; while(n < int(f.size() + h.size()))n *= 2; f.resize(n, 0); h.resize(n, 0); ntt(f); ntt(h); for(int i = 0; i < n; i++)f[i] = f[i] * h[i] % MOD; intt(f); return f; } }; using NTT1 = NTT<167772161, 3>; using NTT2 = NTT<469762049, 3>; using NTT3 = NTT<1224736769, 3>; template long long garner(vector b, vector m, T MOD){ m.emplace_back(MOD); vector coef(m.size(), 1); vector consts(m.size(), 0); for(int i = 0; i < b.size(); i++){ long long t = ((b[i] - consts[i]) % m[i]) * modinv(coef[i], m[i]) % m[i]; for(int j = i + 1; j < m.size(); j++){ consts[j] = (consts[j] + t * coef[j] % m[j]) % m[j]; coef[j] = coef[j] * m[i] % m[j]; } } return consts.back(); } vector arbitrary_mod_convolution(vector f, vector g, int MOD){ for(size_t i = 0; i < f.size(); i++)f[i] %= MOD; for(size_t i = 0; i < g.size(); i++)g[i] %= MOD; NTT1 ntt1; NTT2 ntt2; NTT3 ntt3; auto x1 = ntt1.convolution(f, g); auto x2 = ntt2.convolution(f, g); auto x3 = ntt3.convolution(f, g); vector res(x1.size()); vector b(3), m(3); m[0] = ntt1.get_mod(); m[1] = ntt2.get_mod(); m[2] = ntt3.get_mod(); for(size_t i = 0; i < x1.size(); i++){ b[0] = x1[i]; b[1] = x2[i]; b[2] = x3[i]; res[i] = garner(b, m, MOD); } return res; } int main(int argc, char const* argv[]) { ios_base::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(20); INT(n); vector a(n); cin >> a; ll res = 1; ll sum = a[n-1]; rrep(i, n - 1){ res = res * power(a[i], sum, mod) % mod; sum += a[i]; } vector b(2e5+1, 0); rep(i, n)b[a[i]]++; NTT1 ntt1; auto f = ntt1.convolution(b, b); rep(i, n)f[a[i] * 2]--; rep(i, sz(f))f[i] /= 2; /*rep(i, 10)cout << b[i] << "\n "[i + 1 != 10]; rep(i, 10)cout << b[i] << "\n "[i + 1 != 10]; rep(i, 10)cout << f[i] << "\n "[i + 1 != 10];*/ FOR(i, 1, sz(f)){ res = res * power(i, f[i], mod) % mod; } ll am = a[n-1]; double mini = 1e18; ll prod = 1; rrep(i, n - 1){ double tmp = log(a[i] + am) + am * log(a[i]); if(tmp < mini){ mini = tmp; prod = (am + a[i]) * power(a[i], am, mod) % mod; } am = min(am, a[i]); } res = res * modinv(prod, mod) % mod; cout << res << endl; return 0; }