#include #include #include using namespace std; using namespace atcoder; using mint = modint1000000007; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000001 int main(){ int n; cin>>n; vector a(n); rep(i,n)cin>>a[i]; { auto t =a; sort(t.begin(),t.end()); t.erase(unique(t.begin(),t.end()),t.end()); rep(i,n){ a[i] = distance(t.begin(),lower_bound(t.begin(),t.end(),a[i])); } } fenwick_tree X(n),Y(n); rep(i,n){ Y.add(a[i],mint(2).pow(n-1-i)); } mint ans = 0; rep(i,n){ Y.add(a[i],-mint(2).pow(n-1-i)); ans += X.sum(0,a[i]) * Y.sum(0,a[i]); ans += X.sum(a[i]+1,n) * Y.sum(a[i]+1,n); X.add(a[i],mint(2).pow(i)); } cout<