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#include <iostream>
#include "message.h"
#include "teatr.h"
#include "bits/stdc++.h"

/*
Autor: Helena Borak-Wejster
*/
using namespace std;


int main(){
    if(MyNodeId()==0){
        long long int n = GetN();
        long long int counter = 0;
        for(long long int i=0;i<n;i++){
            for(long long int j=i+1;j<n;j++){
                if(GetElement(i)>GetElement(j)) counter++;
            }
        }
        cout << counter << endl;
    }
    return 0;
}