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 "shoes.h"
#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<int(n);i++)
using namespace std;
typedef long long ll;
long long count_swaps(std::vector<int> s) {
ll ans=0;
for(int i=0;i<(int)s.size();i+=2){
int idx=-1;
for(int j=i+1;j<(int)s.size();j++){
if(s[j]==-s[i]){idx=j;break;}
}
while(idx!=i+1){
swap(s[idx-1],s[idx]);
idx--;
ans++;
}
if(s[i]>0){
swap(s[i],s[i+1]);
ans++;
}
}
return ans;
}
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