include <bits/stdc++.h>

define ll long long

define Nmax 100000

define F first

define S second

define forup(i,s,e) for(int i=s; i<=e; i++)

define ll long long

define ull unsigned ll

define vi vector<int>

define pii pair<int,int>

define vii vector<pii>

define vt vector

define fordown(i,e,s) for(int i=e; i>=s; i--)

using namespace std; const int MOD=1e9+7;

int main () {

ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);

#ifndef ONLINE_JUDGE
freopen("Exam.INP", "r", stdin);
freopen("Exam.OUT", "w", stdout);
#endif

return 0;

}