#include <iostream>
#include <fstream>
#include <vector>
#include <map>
#include <queue>
#include "shoes.h"
using namespace std;
typedef long long ll;
const int maxn = 2e5 + 10;
ll segment_tree[3 * maxn];
void build_tree(int L, int R, int position) {
if(L == R) {
segment_tree[position] = 0;
}
else {
int middle = (L + R) / 2;
build_tree(L, middle, 2 * position);
build_tree(middle + 1, R, 2 * position + 1);
segment_tree[position] = segment_tree[2 * position] + segment_tree[2 * position + 1];
}
}
// L R i L R j L R
ll query(int L, int R, int position, int i, int j) {
if(i <= L and R <= j) {
return segment_tree[position];
}
if(R < i or j < L) {
return 0;
}
int middle = (L + R) / 2;
return query(L, middle, 2 * position, i, j) + query(middle + 1, R, 2 * position + 1, i, j);
}
void update(int L, int R, int position, int idx, ll new_val) {
if(L == R) {
segment_tree[position] += new_val;
return;
}
int middle = (L + R) / 2;
if(idx <= middle) {
update(L, middle, 2 * position, idx, new_val);
}
else {
update(middle + 1, R, 2 * position + 1, idx, new_val);
}
segment_tree[position] = segment_tree[2 * position] + segment_tree[2 * position + 1];
}
ll count_swaps(vector<int> v) {
map<int, queue<int> > m;
vector<int> S;
int cnt = 0;
for(int i = 0; i < v.size(); i++) {
if(!m[v[i]].empty()) {
S.push_back(m[v[i]].front());
m[v[i]].pop();
}
else {
int r = 0;
if(v[i] > 0) {
r = 1;
}
S.push_back(2 * cnt + r);
m[-v[i]].push(2 * cnt + (1 - r));
cnt++;
}
}
build_tree(0, v.size(), 1);
ll res = 0;
for(int i = 0; i < S.size(); i++) {
update(0, v.size(), 1, v[i], 1);
res += query(0, v.size(), 1, i + 1, v.size());
}
return res;
}
