#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    size_t size;

    cin >> size;

    size_t * arr = new size_t[size];

    for (size_t i = 0; i < size; i++) {
        cin >> arr[i];
    }

    size_t totalLen = 0;

    for (size_t i = 0; i < size; i++) {
        for (size_t j = i + 1; j < size; j++) {
            if (arr[i] == arr[j]) {
                totalLen += j - i - 1;
                break;
            }
            if (arr[i] < arr[j]) {
                break;
            }
        }
    }

    cout << totalLen << endl;

    delete arr;

    return 0;
}