#include<bits/stdc++.h>
using namespace std;
#include<atcoder/convolution>
using ll=long long;

int main(){
	ll n;
	cin>>n;
	vector<ll>a(n+1);
	for(int i=0;i<n+1;++i)cin>>a[i];
	ll m;
	cin>>m;
	vector<ll>b(m+1);
	for(int i=0;i<m+1;++i)cin>>b[i];
	auto c=atcoder::convolution_ll(a,b);
	while((int)c.size()>=2&&c.back()==0)c.pop_back();
	cout<<c.size()-1<<endl;
	for(int i=0;i<c.size();++i){
		cout<<c[i]%258280327<<" \n"[i==n+m];
	}
}