#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
const int MAXN = 100005;
int N;
vi BIT ( 2 * MAXN );
map<int, deque<int>> pos;
ll qry ( int x )
{
x = N - x;
ll res = 0;
for ( ; x; x -= (x & -x) )
res += BIT[x];
return res;
}
void upd ( int x )
{
x = N - x;
for ( ; x < N; x += (x & -x) )
BIT[x]++;
}
ll count_swaps ( vi s )
{
N = s.size();
vi nxt ( N, 0 ), vis ( N, 0 );
ll ans = 0;
for ( int i = 0; i < N; i++ )
{
if ( pos[-s[i]].empty() )
pos[s[i]].push_back ( i + 1 );
else
nxt[pos[-s[i]].front() - 1] = i, pos[-s[i]].pop_front();
}
for ( int i = 0; i < N; i++ )
{
if ( vis[i] )
continue;
ans += (nxt[i] + qry(nxt[i])) - (i + qry(i)) - 1;
upd ( nxt[i] );
vis[nxt[i]] = 1;
if ( s[i] > 0 )
ans++;
}
return ans;
}
