#include using namespace std; using ll = long long; using ld = long double; using ull = unsigned long long; template using max_heap = priority_queue; template using min_heap = priority_queue, greater>; #define rep(i, l, r) for (ll i = (l); i < (r); i++) #define rrep(i, r, l) for (ll i = (r); i-- > (l);) #define all(x) begin(x), end(x) template bool chmin(T& lhs, T rhs) { return lhs > rhs ? (lhs = rhs, true) : false; } template bool chmax(T& lhs, T rhs) { return lhs < rhs ? (lhs = rhs, true) : false; } struct IOIO { IOIO() { cin.tie(0)->sync_with_stdio(0); } } ioio; template ostream& operator<<(ostream& os, const pair& p) { os << '(' << p.first << ", " << p.second << ')'; return os; } template ostream& operator<<(ostream& os, const vector& vs) { os << '{'; rep(i, 0, (int)vs.size()) os << vs[i] << (i + 1 == (int)vs.size() ? "" : ", "); os << '}'; return os; } template ostream& operator<<(ostream& os, const set& vs) { os << '{'; for (auto it = vs.begin(); it != vs.end(); it++) { if (it != vs.begin()) { os << ", "; } os << *it; } os << '}'; return os; } template ostream& operator<<(ostream& os, const map& vs) { os << '{'; for (auto it = vs.begin(); it != vs.end(); it++) { if (it != vs.begin()) { os << ", "; } os << *it; } os << '}'; return os; } #ifdef DEBUG void dump_func() { cerr << endl; } template void dump_func(Head&& head, Tail&&... tail) { cerr << head; if (sizeof...(Tail) > 0) { cerr << ", "; } dump_func(std::move(tail)...); } #define dump(...) cerr << "[" + string(#__VA_ARGS__) + "] ", dump_func(__VA_ARGS__) #else #define dump(...) static_cast(0) #endif constexpr int N = 2 * 100000 * 32; constexpr int OFFSET = 100000 * 32; int MP[31][N]; int SUM[31]; void solve() { int n; cin >> n; vector a(n); rep(i, 0, n) cin >> a[i]; ll ans = (ll)n * (n + 1) / 2 - n; auto DnC = [&](auto&& self, int l, int r) -> void { if (l + 1 == r) return; int m = (l + r) / 2; self(self, l, m); self(self, m, r); rep(x, 1, 31) { int sum = 0; rep(i, m, r) { sum += a[i]; MP[a[i]][(i - m + 1) * x - sum + OFFSET]++; } sum = 0; rrep(i, m, l) { sum += a[i]; if (a[i] == x) ans += MP[a[i]][sum - a[i] * (m - i) + OFFSET]; } sum = 0; rep(i, m, r) { sum += a[i]; MP[a[i]][(i - m + 1) * x - sum + OFFSET]--; } } }; auto DnC2 = [&](auto&& self, int l, int r) -> void { if (l + 1 == r) return; int m = (l + r) / 2; self(self, l, m); self(self, m, r); rep(x, 1, 31) { int sum = 0; rep(i, m, r) { sum += a[i]; MP[x][(i - m + 1) * x - sum + OFFSET]++; } } { int sum = 0; rrep(i, m, l) { sum += a[i]; ans -= MP[a[i]][sum - a[i] * (m - i) + OFFSET]; } } rep(x, 1, 31) { int sum = 0; rep(i, m, r) { sum += a[i]; MP[x][(i - m + 1) * x - sum + OFFSET]--; } } }; DnC(DnC, 0, n); DnC2(DnC2, 0, n); reverse(all(a)); DnC2(DnC2, 0, n); cout << ans + 1 << '\n'; } int main() { int t = 1; while (t--) solve(); }