// author : thembululquaUwU
// 3.9.2024
#include <bits/stdc++.h>
#include "grader.h"
#define pb push_back
#define fi first
#define se second
#define endl '\n'
using namespace std;
using ll = long long;
using ii = pair <int, int>;
using vi = vector <int>;
const int N = 1e6;
const int mod = 1e9 + 7;
void maxl(auto &a, auto b) {a = max(a, b);}
void minl(auto &a, auto b) {a = min(a, b);}
mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
#define rand rd
void solve(int n){
srand(time(NULL));
vector <int> ap;
for (int loops = 0; loops < min(30, n / 2); ++ loops){
int i = rd() % n + 1;
int v = kth(i);
if (cnt(v) * 3 > n){
say_answer(v);
return;
}
}
say_answer(-1);
}
//int main(){
// if (fopen("pqh.inp", "r")){
// freopen("pqh.inp", "r", stdin);
// freopen("pqh.out", "w", stdout);
// }
// ios_base::sync_with_stdio(0);
// cin.tie(0); cout.tie(0);
//
// int t = 1; // cin >> t;
// while (t --) solve();
// return 0;
//}
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