This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second
#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()
#define TEXT "a"
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
ll count_swaps(vector<int> a){
int n = a.size();
ll res = 0;
for (int i = 0; i < n; i += 2){
int p;
for (p = i + 1; p < n; p++){
if (a[p] == -a[i]) break;
}
for (int j = p - 1; j > i; j--){
swap(a[j], a[j + 1]);
res++;
}
if (a[i] > 0){
swap(a[i],a[i + 1]);
res++;
}
}
return res;
}
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