#include using namespace std; #ifdef _RUTHEN #include #else #define show(...) true #endif #define REP(i, n) for (int i = 0; i < (n); i++) template using V = vector; #include using mint = atcoder::static_modint<258280327>; ostream &operator<<(ostream &os, const mint &p) { return os << p.val(); } V convolution(V &a, V &b) { assert(a.size() == b.size()); const int n = (int)a.size(); if (n <= 60) { V c(n + n - 1); REP(i, n) REP(j, n) c[i + j] += a[i] * b[j]; return c; } const int n2 = (n + 1) / 2; V a0(n2), a1(n2), b0(n2), b1(n2); for (int i = 0; i < n2; i++) { a0[i] = a[i]; b0[i] = b[i]; } for (int i = n2; i < n; i++) { a1[i - n2] = a[i]; b1[i - n2] = b[i]; } V a01(n2), b01(n2); REP(i, n2) { a01[i] = a0[i] + a1[i]; b01[i] = b0[i] + b1[i]; } auto c0 = convolution(a0, b0); auto c1 = convolution(a1, b1); auto c2 = convolution(a01, b01); V c(n2 + n2 + n2 + n2 - 1); REP(i, n2 + n2 - 1) { c[i] += c0[i]; c[i + n2] += c2[i] - c0[i] - c1[i]; c[i + n2 + n2] += c1[i]; } return c; } int main() { ios::sync_with_stdio(false); cin.tie(0); int N; cin >> N; N++; V a(N); REP(i, N) cin >> a[i]; int M; cin >> M; M++; V b(N); REP(i, N) cin >> b[i]; if (N == 1 and a[0] == 0) { cout << 0 << '\n'; cout << 0 << '\n'; return 0; } if (M == 1 and b[0] == 0) { cout << 0 << '\n'; cout << 0 << '\n'; return 0; } V A(N); REP(i, N) A[i] = a[i]; V B(M); REP(i, M) B[i] = b[i]; int K = max(N, M); while (A.size() < K) A.push_back(0); while (B.size() < K) B.push_back(0); auto C = convolution(A, B); show(C); while (C.size() > N + M - 1) C.pop_back(); show(C); cout << C.size() - 1 << '\n'; REP(i, C.size()) cout << C[i] << " \n"[i + 1 == C.size()]; return 0; }