#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(std::vector<int> s) {
int n = s.size()/2;
vector<int> v = s;
for (int &i : v) cin >> i;
vector<int> val;
for (int i : v) {
if (i > 0) val.emplace_back(i);
}
sort(val.begin(), val.end());
int ans = 1e9;
do {
vector<int> goal;
for (int i : val) {
goal.emplace_back(-i);
goal.emplace_back(i);
}
vector<bool> done(2*n);
vector<int> arr;
for (int i = 0; i < 2*n; i++) {
int j = 0;
for (; j < 2*n; j++) {
if (!done[j] && goal[j] == v[i]) {
break;
}
}
done[j] = 1;
arr.emplace_back(j);
}
int curr = 0;
for (int i = 0; i < 2*n; i++) {
for (int j = 0; j < i; j++) {
if (arr[j] > arr[i]) curr++;
}
}
ans = min(ans, curr);
} while (next_permutation(val.begin(), val.end()));
return ans;
}
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