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 <bits/stdc++.h>
#include "grader.h"
using namespace std;
int kth(int k);
void say_answer(int k);
int cnt(int k);
auto rng=bind(uniform_int_distribution<int>(1,1e9),mt19937(time(0)));
void solve(int n)
{
map<int,int> mp;
int q=0;int x=-1;
int cntt=0;
while(q<60 && x==-1 && cntt<(2*n)/3){
int w=kth(rng()%n+1);q++;
if(mp.count(w)) continue;
int how=cnt(w);cntt+=how;
if(how>(n/3)) x=w;
}
say_answer(x);
}
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