#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001

template <class T>
vector<T> convolution_mint(vector<T> a,vector<T> b){
	
	static constexpr unsigned long long M0 = 998244353;
	static constexpr unsigned long long M1 = 754974721;
	static constexpr unsigned long long M2 = 469762049;
	
	vector<long long> aa(a.size()),bb(b.size());
	rep(i,a.size())aa[i] = a[i].val();
	rep(i,b.size())bb[i] = b[i].val();
	
	auto c0 = convolution<M0>(aa,bb);
	auto c1 = convolution<M1>(aa,bb);
	auto c2 = convolution<M2>(aa,bb);
	
	vector<mint> ret(c0.size());
	
	rep(i,c0.size()){		
		
		ret[i] += c0[i];
		
		{
			long long cur = c0[i];
			cur %= M1;
			cur = c1[i]-cur;
			if(cur<0)cur += M1;
			cur *= 416537774;
			cur %= M1;
			
			mint m = M0;
			ret[i] += m*cur;
			
			cur *= M0;
			cur += c0[i];
			cur %= M2;
			cur = c2[i] - cur;
			if(cur<0)cur += M2;
			cur *= 429847628;
			cur %= M2;
			m *= M1;
			ret[i] += m * cur;
		}
	}
	
	return ret;
}

int main(){
	mint::set_mod(258280327);
	
	int N,M;
	cin>>N;
	vector<mint> a(N+1);
	rep(i,N+1){
		long long t;
		cin>>t;
		a[i] = t;
	}
	cin>>M;
	vector<mint> b(M+1);
	rep(i,M+1){
		long long t;
		cin>>t;
		b[i] = t;
	}
	a = convolution_mint(a,b);
	while(a.size()>1 && a.back()==0)a.pop_back();
	cout<<a.size()-1<<endl;
	rep(i,a.size()){
		if(i!=0)cout<<' ';
		cout<<a[i].val();
	}
	cout<<endl;
	
	/*
	long long N,E;
	cin>>N>>E;
	
	if(N>=0){
		long long sq = sqrtl(N);
		if(sq*sq==N){
			cout<<sq<<endl;
			return 0;
		}
	}
	*/
	
	
	return 0;
}