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;
map <int,bool> m;
int x;
void solve(int n){
srand(time(0)); int q=0;
while (q<min(n,30)){
x=rand()%n+1;
if (m[x]) continue;
q++; m[x]=1; x=kth(x);
if (cnt(x)>n/3){
say_answer(x); return;
}
}
say_answer(-1); return;
}
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