#include "shoes.h"
#include <iostream>
#include <vector>
#include <cstdlib>
#include <map>
#define ll long long
using namespace std;
ll n, f, x, y, st[800000], id[2][200000];
bool B[200000];
vector <ll> V[2][200000], X;
void build(ll id, ll l, ll r) {
if (l == r) {
st[id] = 1;
return;
}
ll mid = (l+r)/2;
build(id*2, l, mid);
build(id*2+1, mid+1, r);
st[id] = st[id*2] + st[id*2+1];
}
ll query(ll id, ll l, ll r, ll ql, ll qr) {
if (qr < l || r < ql) return 0;
else if (ql <= l && r <= qr) return st[id];
ll mid = (l+r)/2;
return query(id*2, l, mid, ql, qr) + query(id*2+1, mid+1, r, ql, qr);
}
void update(ll id, ll l, ll r, ll q) {
if (l == r) {
st[id] = 0;
return;
}
ll mid = (l+r)/2;
if (q <= mid) update(id*2, l, mid, q);
else update(id*2+1, mid+1, r, q);
st[id] = st[id*2] + st[id*2+1];
}
long long count_swaps(std::vector<int> s) {
build(1, 0, s.size()-1);
f = 0;
for (int i=0; i<s.size(); ++i) {
V[(s[i] < 0)][abs(s[i])-1].push_back(i);
}
for (int i=0; i<s.size(); ++i) {
if (B[i]) continue;
auto u = V[1][abs(s[i])-1][id[1][abs(s[i])-1]];
auto v = V[0][abs(s[i])-1][id[0][abs(s[i])-1]];
B[u] = B[v] = 1;
++id[0][abs(s[i])-1];
++id[1][abs(s[i])-1];
f += query(1, 0, s.size()-1, 0, u)-1;
update(1, 0, s.size()-1, u);
f += query(1, 0, s.size()-1, 0, v)-1;
update(1, 0, s.size()-1, v);
}
return f;
}
