#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;

namespace {

typedef long long ll;

const int N = 1e5 + 7;

int n;
int s[2 * N];
vector<int> ls[N], rs[N];

}

long long count_swaps(vector<int> grds) {
	n = grds.size() / 2;
	for (int i = 0; i < 2 * n; ++i) {
		s[i] = grds[i];
	}
	for (int i = 0; i < 2 * n; ++i) {
		if (s[i] < 0) {
			ls[-s[i]].push_back(i);
		} else {
			rs[s[i]].push_back(i);
		}
	}
	ll ans = 0;
	for (int x = 1; x <= n; ++x) {
		for (int i = 0; i < (int)ls[x].size(); ++i) {
			int l = ls[x][i];
			int r = rs[x][i];
			if (l > r) {
				ans += 1;
				swap(l, r);
			}
			ans += r - l - 1;
		}
	}
	return ans;
}