Olympiad Template

#include <bits/stdc++.h>
using namespace std;
#define f(k,n) for (int k=0;k<n;k++)
#define file
#define pb push_back
#define F first
#define S second
#define inf 1999999999
#define mp(i,j) make_pair((i),(j))
#define pii pair<int,int>

int main() {
    #ifndef ONLINE_JUDGE
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif

}