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 "trilib.h"
#include <bits/stdc++.h>
using namespace std ;
const int MAX = 50 + 10 ;
mt19937 rng(2023) ;
int N ;
int main()
{
N = get_n() ;
int ans = 0 ;
vector<int>v ;
for(int i = 1 ; i <= N ; ++i)
{
bool flag = false ;
for(int j = 1 ; j <= N && (!flag) ; ++j)
{
v.clear() ;
for(int k = 1 ; k <= N ; ++k)
{
if(i == j || i == k || j == k)
continue ;
v.push_back(k) ;
}
shuffle(v.begin() , v.end() , rng) ;
flag = (i != j) ;
for(auto &k : v)
{
if(!flag)
break ;
flag &= is_clockwise(i , j , k) ;
}
}
ans += flag ;
}
give_answer(ans) ;
return 0 ;
}
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