#pragma optimize("Bismillahirrahmanirrahim")
//█▀█─█──█──█▀█─█─█
//█▄█─█──█──█▄█─█■█
//█─█─█▄─█▄─█─█─█─█
//Allahuekber
//ahmet23 orz...
//FatihSultanMehmedHan
//YavuzSultanSelimHan
//AbdulhamidHan
//Sani buyuk Osman Pasa Plevneden cikmam diyor
#define author tolbi
#include <bits/stdc++.h>
using namespace std;
template<typename X, typename Y> istream& operator>>(istream& is, pair<X,Y> &pr){return is>>pr.first>>pr.second;}
template<typename X, typename Y> ostream& operator<<(ostream& os, pair<X,Y> pr){return os<<pr.first<<" "<<pr.second;}
template<typename T> istream& operator>>(istream& is, vector<T> &arr){for (auto &it : arr) is>>it; return is;}
template<typename T> ostream& operator<<(ostream& os, vector<T> arr){for (auto &it : arr) os<<it<<" "; return os;}
template<typename T,size_t Y> istream& operator>>(istream& is, array<T,Y> &arr){for (auto &it : arr) is>>it; return is;}
template<typename T,size_t Y> ostream& operator<<(ostream& os, array<T,Y> arr){for (auto &it : arr) os<<it<<" "; return os;}
#define deci(x) int x;cin>>x;
#define decstr(x) string x;cin>>x;
#define cinarr(x) for (auto &it : x) cin>>it;
#define coutarr(x) for (auto &it :x) cout<<it<<" ";cout<<endl;
#define sortarr(x) sort(x.begin(), x.end())
#define sortrarr(x) sort(x.rbegin(), x.rend())
#define rev(x) reverse(x.begin(), x.end())
#define tol(bi) (1LL<<((int)(bi)))
typedef long long ll;
const int MOD = 1e9+7;
mt19937 ayahya(chrono::high_resolution_clock().now().time_since_epoch().count());
#include "shoes.h"
struct SegTree{
vector<int> segtree;
SegTree(int n){
segtree.resize(tol(ceil(log2(n)+1))-1,0ll);
}
inline void update(int node){
node+=segtree.size()/2;
segtree[node]=1;
while (node){
node=(node-1)/2;
segtree[node]=segtree[node*2+1]+segtree[node*2+2];
}
}
int query(int tarl, int tarr, int l = 0, int r = -1, int node = 0){
if (r==-1) r = segtree.size()/2;
if (l>=tarl && r<=tarr) return segtree[node];
if (l>tarr || r<tarl) return 0ll;
int mid = l+(r-l)/2;
int lnode = query(tarl, tarr, l, mid, node*2+1);
int rnode = query(tarl, tarr, mid+1, r, node*2+2);
return lnode+rnode;
}
};
long long count_swaps(vector<int> s) {
int n = s.size();
SegTree segtree(n);
map<int,queue<int>> mp;
vector<bool> taken(n,false);
for (int i = 0; i < n; i++){
mp[s[i]].push(i);
}
ll ans = 0;
for (int i = 0; i < n; i++){
if (taken[i]) continue;
int l = i;
int r = mp[-s[i]].front();
mp[-s[i]].pop();
mp[s[i]].pop();
if (s[i]>0) ans++;
ans+=segtree.query(l,r);
segtree.update(l);
segtree.update(r);
taken[l]=taken[r]=true;
}
return ans;
}
