#include <bits/stdc++.h>
#include "shoes.h"
using namespace std;
#define name "shoes"
#define MAXN 200005
#define pb push_back
#define pf push_front
#define ll long long
#define ii pair<int, int>
#define fs first
#define sc second
#define ill pair<int, ll>
#define lli pair<ll, int>
#define llll pair<ll, ll>
#define all(v) v.begin(),v.end()
#define uni(v) v.erase(unique(all(v)),v.end())
#define bit(n,i) (((n)>>(i))&1)
#define FOR(i,a,b) for (int i=(a),_b=(b); i<=_b; i++)
#define FORD(i,a,b) for (int i=(a),_b=(b); i>=_b; i--)
#define MASK(i) (1LL<<(i))
const int INF=1e9;
const int MOD=1e9+7;
void add(int &u, int v){
u+=v;
if (u>=MOD) u-=MOD;
}
void sub(int &u, int v){
u-=v;
if (u<0) u+=MOD;
}
void minimize(ll &u, ll v){
u=min(u,v);
}
void maximize(int &u, int v){
u=max(u,v);
}
long long Rand(long long l, long long r){
ll tmp=0;
FOR(i,1,4) tmp=((tmp<<15)^(((1<<15)-1)&rand()));
return l+tmp%(r-l+1);
}
namespace sub2{
ll solve(vector<int> S){
vector<int> perm;
FOR(i,0,(int)S.size()-1) if (S[i]<0) perm.pb(i);
vector<int> a,b;
ll kq=1e18;
do{
a=S;
b.clear();
ll res=0;
for (int id:perm){
b.pb(S[id]);
b.pb(-S[id]);
}
FOR(i,0,(int)S.size()-1){
FOR(j,i,(int)S.size()-1) if (b[i]==a[j]){
int u=j;
while (u>i){
res++;
swap(a[u],a[u-1]);
--u;
}
break;
}
}
minimize(kq,res);
}
while (next_permutation(all(perm)));
return kq;
}
}
namespace sub6{
int bit[MAXN];
void update(int x){
for (; x<MAXN; x+=x&-x) bit[x]++;
}
int get(int x){
int res=0;
for (; x>0; x-=x&-x) res+=bit[x];
return res;
}
bool mark[MAXN];
vector<int> vec[2][MAXN];
ll solve(vector<int> S){
FORD(i,(int)S.size()-1,0){
if (S[i]<0) vec[0][abs(S[i])].pb(i+1);
else vec[1][S[i]].pb(i+1);
}
ll ans=0;
FOR(i,1,(int)S.size()){
if (mark[i]) continue;
if (S[i-1]>0){
int x=vec[0][S[i-1]].back();
vec[0][S[i-1]].pop_back();
vec[1][S[i-1]].pop_back();
int tmp=get(x)-get(i);
ans+=1LL*(x-i-tmp);
update(x);
mark[x]=1;
}
else{
int x=vec[1][abs(S[i-1])].back();
vec[1][abs(S[i-1])].pop_back();
vec[0][abs(S[i-1])].pop_back();
int tmp=get(x)-get(i);
ans+=1LL*(x-i-tmp+1);
update(x);
mark[x]=1;
}
}
return ans;
}
}
ll count_swaps(vector<int> S){
//if (S.size()<=16) return sub2::solve(S);
return sub6::solve(S);
}
