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>
using namespace std;
#define ll long long int
#define pb push_back
long long count_swaps(std::vector<int> s) {
int n = s.size() + 5;
vector<deque<int>> pos(n + n);
ll ans = 0;
int m = s.size();
// for(int i = 0; i < s.size(); ++i){
// if(s[i] < 0){
// if(pos[-s[i] + n].empty()){
// pos[-s[i]].pb(i);
// }else{
// ans += i - pos[-s[i] + n].front();
// pos[-s[i] + n].pop_front();
// }
// }else{
// if(pos[s[i]].empty()){
// pos[s[i] + n].pb(i);
// }else{
// ans += i - 1 - pos[s[i]].front();
// pos[s[i]].pop_front();
// // cout << ans << ' ';
// }
// }
// cout << ans << ' ';
// }
for(int i = 0; i < m; i += 2){
for(int j = i + 1; j < m; ++j){
if(abs(s[i]) == abs(s[j]) && s[i] == -s[j]){
for(int l = j - 1; l > i; --l){
swap(s[l], s[l + 1]);
++ans;
// cout << l << ' ';
}
if(s[i] > s[i + 1]) swap(s[i], s[i + 1]), ++ans;
break;
}
}
// cout << '\n';
}
return ans;
}
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