/* Problem URL: https://cses.fi/problemset/task/1748 */ #include using namespace std; #define V vector #define rmin(a, b) a = min(a, b) #define rmax(a, b) a = max(a, b) #define rep(i, lim) for (int i = 0; i < (lim); i++) #define nrep(i, s, lim) for (int i = s; i < (lim); i++) #define repv(i, v) for (auto &i : (v)) #define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; } #define sortv(v) sort(v.begin(), v.end()) #define all(v) (v).begin(), (v).end() using vi = vector; using vvi = vector; using vvvi = vector; using vvvvi = vector; using ll = long long; using vl = vector; using vvl = vector; using vvvl = vector; using vvvvl = vector; template auto operator<<(ostream &os, const vector &vec)->ostream& { os << vec[0]; for (size_t i = 1; i < vec.size(); i++) { os << ' ' << vec[i]; } os << '\n'; return os; } template auto operator>>(istream &is, vector &vec)->istream& { for (auto &i : vec) { is >> i; } return is; } template auto operator<<(ostream &os, const vector> &vec)->ostream& { for (auto &i : vec) { os << i[0]; for (size_t j = 1; j < i.size(); j++) { os << ' ' << i[j]; } os << '\n'; } return os; } template auto operator>>(istream &is, vector> &vec)->istream& { for (auto &i : vec) { for (auto &j : i) { is >> j; } } return is; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n; cin >> n; map var; vi fds(n); repv(i, fds) { cin >> i; var[i] = 0; } int v = 0; repv(i, var) { i.second = v; v++; } repv(i, fds) { i = var[i]; } while (__builtin_popcount(fds.size()) != 1) { fds.push_back(0); } vl seg(fds.size() * 2); ll mod = 1e9 + 7; auto update = [&](int i, ll v) { seg[i + fds.size()] += v; seg[i + fds.size()] %= mod; for (i = (i + fds.size()) / 2; i > 0; i /= 2) { seg[i] = (seg[i * 2] + seg[i * 2 + 1]) % mod; } }; function search = [&](int i, int l, int r, int tl, int tr) -> ll { if (l > tr || r < tl) { return 0; } if (l >= tl && r <= tr) { return seg[i]; } int mid = (l + r) / 2; return (search(i * 2, l, mid, tl, tr) + search(i * 2 + 1, mid + 1, r, tl, tr)) % mod; }; rep(i, n) { ll tmp = search(1, 0, fds.size() - 1, 0, fds[i] - 1) + 1; update(fds[i], tmp); } cout << search(1, 0, n - 1, 0, n - 1) << '\n'; }