#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<long long> a(n + 1);
    for (int i = 0; i < n + 1; i++) {
        cin >> a[i];
    }
    int m;
    cin >> m;
    vector<long long> b(m + 1);
    for (int i = 0; i < m + 1; i++) {
        cin >> b[i];
    }
    auto c = convolution<258280327>(a, b);
    cout << n + m << '\n';
    for (int i = 0; i < (int) c.size(); i++) {
        cout << c[i] << " \n"[i + 1 == (int) c.size()];
    }
}