#include "rail.h"
#include <bits/stdc++.h>
//int getDistance(int i, int j) {
//return 0;
//}
void findLocation(int n, int first, int location[], int stype[]) {
location[0] = first, stype[0] = 1;
std::vector <int> inv(int(1e6) + 3, -1);
inv[first] = 0;
if (n == 1) {
return;
}
std::vector <std::pair <int, int>> a(n - 1);
for (int i = 1; i < n; i++) {
a[i - 1] = { getDistance(0, i), i };
}
std::sort(a.rbegin(), a.rend());
int l = first, r = a.back().second;
location[r] = first + a.back().first;
stype[r] = 2;
inv[location[r]] = r;
a.pop_back();
while (a.size()) {
int ind = a.back().second;
a.pop_back();
int left = getDistance(l, ind);
int right = getDistance(r, ind);
int loc1 = location[l] + left;
int loc2 = location[r] - right;
int mid =(loc1 + loc2) >> 1;
if (inv[mid] != -1) {
stype[ind] = stype[inv[mid]] == 1 ? 2 : 1;
} else if (first < mid) {
stype[ind] = 2;
} else {
stype[ind] = 1;
}
if (stype[ind] == 1) {
std::swap(loc1, loc2);
}
location[ind] = loc1;
inv[location[ind]] = ind;
if (loc1 > location[r]) {
r = loc1;
} else if (loc1 < location[l]) {
l = loc2;
}
}
}
//int main() {
//}
