// yukicoder/1975/main.cpp // author: @___Johniel // github: https://github.com/johniel/ #include #define each(i, c) for (auto& i : c) #define unless(cond) if (!(cond)) // #define endl "\n" using namespace std; template ostream& operator << (ostream& os, pair p) { os << "(" << p.first << "," << p.second << ")"; return os; } template istream& operator >> (istream& is, pair& p) { is >> p.first >> p.second; return is; } template ostream& operator << (ostream& os, vector v) { os << "("; for (auto& i: v) os << i << ","; os << ")"; return os; } template istream& operator >> (istream& is, vector& v) { for (auto& i: v) is >> i; return is; } template ostream& operator << (ostream& os, set s) { os << "#{"; for (auto& i: s) os << i << ","; os << "}"; return os; } template ostream& operator << (ostream& os, map m) { os << "{"; for (auto& i: m) os << i << ","; os << "}"; return os; } template istream& operator >> (istream& is, array& a) { for (auto& i: a) is >> i; return is; } template ostream& operator << (ostream& os, array& a) { os << "[]{"; for (auto& i: a) os << i << ","; os << "}"; return os; } template inline T setmax(T& a, T b) { return a = std::max(a, b); } template inline T setmin(T& a, T b) { return a = std::min(a, b); } using lli = long long int; using ull = unsigned long long; using point = complex; using str = string; template using vec = vector; constexpr array di({0, 1, -1, 0, 1, -1, 1, -1}); constexpr array dj({1, 0, 0, -1, 1, -1, -1, 1}); constexpr lli mod = 1e9 + 7; // constexpr lli mod = 998244353; template struct BIT { vector v; int n; BIT(int n_ = 0) { n = n_; v.resize(n + 1, 0); } T operator () (int i) const { T s = 0; while (i > 0) { (s += v.at(i)) %= mod; i -= i & -i; } return s; } T operator () (int begin, int end) const { assert(begin <= end); return (*this)(end) - (*this)(begin); } void add(int i, T x) { ++i; while (i <= n) { (v.at(i) += x) %= mod; i += i & -i; } return ; } static bool verify(void) { vector v; v.push_back(1 << 0); v.push_back(1 << 2); v.push_back(1 << 1); v.push_back(1 << 4); v.push_back(1 << 3); v.push_back(1 << 6); v.push_back(1 << 5); BIT bit(v.size()); for (int i = 0; i < v.size(); ++i) { bit.add(i, v[i]); } if (bit(1, 3) != v[1] + v[2]) return false; int sum = 0; for (int i = 0; i < v.size(); ++i) { if (sum != bit(i)) return false; sum += v[i]; } if (sum != bit(v.size())) return false; for (int i = 0; i < v.size(); ++i) { int sum = 0; for (int j = i; j < v.size(); ++j) { if (sum != bit(i, j)) return false; sum += v[j]; } if (sum != bit(i, v.size())) return false; } return true; } }; int main(int argc, char *argv[]) { ios_base::sync_with_stdio(0); cin.tie(0); cout.setf(ios_base::fixed); cout.precision(15); const int N = 5 * 1e5 + 3; static lli w[N]; w[0] = 1; for (int i = 1; i < N; ++i) { w[i] = w[i - 1] * 2 % mod; } int n; while (cin >> n) { vec a(n); cin >> a; vec b = a; sort(b.begin(), b.end()); b.erase(unique(b.begin(), b.end()), b.end()); map m; for (int i = 0; i < b.size(); ++i) { m[b[i]] = i; } each (i, a) i = m[i]; lli z = 0; for (int _ = 0; _ < 2; ++_) { vec v[2]; v[0] = v[1] = vec(a.size(), 0); for (int __ = 0; __ < 2; ++__) { BIT bit(N); for (int i = 0; i < a.size(); ++i) { lli x = bit(0, a[i]); v[__][i] = x; bit.add(a[i], w[i]); } reverse(a.begin(), a.end()); } reverse(v[1].begin(), v[1].end()); for (int i = 0; i < n; ++i) { z += v[0][i] * v[1][i] % mod; z %= mod; } each (i, a) i = i * (-1) + m.size(); } cout << z << endl; } return 0; }