Z Template

#pragma GCC optimize("O2")
#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
#define forn(i, n) for (ll i = 0; i < ll(n); ++ i)
typedef long long ll; template<class A>void addlog(A a){cerr<<a<<endl;}
template<class A,class... B>void
addlog(A a,B... b){cerr<<a<<' ';addlog(b...);}



int main () {

    return 0;
}