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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    ll r = 0;
    int k = 0;
    for (int i = 1; i < n; i++) {
        if (a[i - 1] < a[i]) {
            k++;
        } else {
            r += k;
        }
    }
    cout << r << endl;

    return 0;
}