#include <bits/stdc++.h>
using namespace std;

const int DIM = 600005;

pair<int, int> arr[DIM];

int main(void) {
	freopen("congr.in", "r", stdin);
	freopen("congr.out", "w", stdout);
	int p; cin >> p;
	random_device rd; mt19937 gen(rd());
	uniform_int_distribution<> dis1(1, p), dis2(p + 1, 2 * p - 1);
	long long sum = 0;
	for (int i = 1; i <= 2 * p - 1; ++i) {
		cin >> arr[i].first; arr[i].second = i; 
		if (i <= p) {
			sum += arr[i].first; } }
	/*while (sum % p) {
		int p1 = dis1(gen), p2 = dis2(gen);
		sum = sum - arr[p1].first + arr[p2].first; 
		swap(arr[p1], arr[p2]); }
	for (int i = 1; i <= p; ++i) {
		cout << arr[i].second << " "; } */
	return 0; }