#include <bits/stdc++.h>
using namespace std;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

int main() {
    int64_t n; cin >> n;
    auto p = vec<int>(uns, n);
    for (auto &e : p) {
        cin >> e; --e;
    }

    auto q = vec<int>(uns, n);
    for (int i = 0; i < n; ++i) {
        q[p[i]] = i;
    }

    auto sum = n * (n + 1) / 2;

    int64_t ans = 0;
    for (int i = n - 1; 0 <= i; --i) {
        sum -= (q[i] + 1) * 2;
        chmax(ans, sum);
        sum += q[i] + 1;
    }

    cout << ans << endl;
}