#include <iostream> #include <string> #include <vector> #include <algorithm> #include <map> #include <atcoder/modint> #include <atcoder/fenwicktree> using namespace std; using i32 = int32_t; using u32 = uint32_t; using i64 = int64_t; using u64 = uint64_t; #define rep(i,n) for(int i=0; i<(int)(n); i++) const i64 INF = 1001001001001001001; using modint = atcoder::static_modint<1000000007>; vector<modint> pow2; vector<modint> solve(vector<int> A){ int N = A.size(); atcoder::fenwick_tree<modint> rq(N); vector<int> I(N); rep(i,N) I[i] = i; sort(I.begin(), I.end(), [&](int l, int r) -> bool { return A[l] < A[r]; }); int l = 0; vector<modint> ans(N); for(int r=0; r<N; r++){ while(l < r && A[I[l]] < A[I[r]]){ rq.add(I[l], pow2[I[l]]); l++; } ans[I[r]] = rq.sum(0, I[r]); } return ans; } int main(){ int N; cin >> N; pow2.resize(N+1, 1); rep(i,N) pow2[i+1] = pow2[i] * 2; vector<int> A(N); rep(i,N) cin >> A[i]; modint ans = 0; rep(t,2){ auto q1 = solve(A); reverse(A.begin(), A.end()); auto q2 = solve(A); reverse(A.begin(), A.end()); rep(i,N) ans += q1[i] * q2[N-1-i]; for(auto& a : A) a *= -1; } cout << ans.val() << '\n'; return 0; } struct ios_do_not_sync{ ios_do_not_sync(){ std::ios::sync_with_stdio(false); std::cin.tie(nullptr); } } ios_do_not_sync_instance;