#include "shoes.h"
#include <bits/stdc++.h>
long long count_swaps(std::vector<int> s) {
int n = (int) s.size() / 2;
long long ans = 0;
for (int i = 0; i < n; i++) {
int f = 2 * i;
// find first neg
int fn = -1;
for (int j = f; j < 2 * n; j++) {
if (s[j] < 0) {
fn = j;
break;
}
}
ans += fn - f;
std::rotate(s.begin() + f, s.begin() + fn, s.begin() + fn + 1);
int target = -s[f];
for (int j = f + 1; j < 2 * n; j++) {
if (s[j] == target) {
fn = j;
break;
}
}
ans += fn - (f + 1);
std::rotate(s.begin() + f + 1, s.begin() + fn, s.begin() + fn + 1);
}
return ans;
}
