//Electrical energy
#include<iostream>
using namespace std;
int ElectricalEnergy(int* arr, int index)
{
    int counter = 0;
    for (size_t i = 0; i < index; i++)
    {
        if (arr[i] > arr[index])
        {
            counter++;
        }
    }
    return counter;
}
int main()
{

    int sumEnergy = 0;
    int num;
    cin >> num;
    int* arr = new int[num];

    for (size_t i = 0; i < num; i++)
    {
        cin >> arr[i];
    }
    for (size_t i = 1; i < num; i++)
    {
        sumEnergy += ElectricalEnergy(arr, i);
    }
    cout << sumEnergy;
    delete[]arr;
    return 0;
}