結果
| 問題 |
No.2272 多項式乗算 mod 258280327
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-04-17 20:03:53 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,242 bytes |
| コンパイル時間 | 2,020 ms |
| コンパイル使用メモリ | 204,952 KB |
| 最終ジャッジ日時 | 2025-02-12 09:40:02 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 18 WA * 15 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#ifdef _RUTHEN
#include <debug.hpp>
#else
#define show(...) true
#endif
#define REP(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;
constexpr int P = 258280327;
void convolution(long long *a, long long *b, const int n, long long *c) {
if (n <= 120) {
REP(i, n) REP(j, n) c[i + j] += a[i] * b[j];
REP(i, n + n - 1) c[i] %= P;
return;
}
const int n0 = (n + 1) / 2;
const int n1 = n - n0;
long long *a0 = a, *b0 = b, *a1 = a + n0, *b1 = b + n0;
long long a01[n0] = {}, b01[n0] = {};
REP(i, n0) {
a01[i] = a0[i];
b01[i] = b0[i];
}
REP(i, n1) {
a01[i] += a1[i];
b01[i] += b1[i];
if (a01[i] >= P) a01[i] -= P;
if (b01[i] >= P) b01[i] -= P;
}
long long c0[n0 + n0 - 1] = {}, c1[n1 + n1 - 1] = {}, c2[n0 + n0 - 1] = {};
convolution(a0, b0, n0, c0);
convolution(a1, b1, n1, c1);
convolution(a01, b01, n0, c2);
REP(i, n0 + n0 - 1) c[i] += c0[i];
REP(i, n1 + n1 - 1) c[i + n0 + n0] += c1[i];
REP(i, n0 + n0 - 1) {
c[i + n0] += c2[i];
if (c[i + n0] >= P) c[i + n0] -= P;
c[i + n0] -= c0[i];
if (c[i + n0] < 0) c[i + n0] += P;
}
REP(i, n1 + n1 - 1) {
c[i + n0] -= c1[i];
if (c[i + n0] < 0) c[i + n0] += P;
}
return;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
constexpr int K = 200000;
long long a[K], b[K];
int N;
cin >> N;
N++;
REP(i, N) cin >> a[i];
int M;
cin >> M;
M++;
REP(i, M) 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;
}
REP(i, N) a[i] %= P;
REP(i, M) b[i] %= P;
int L = max(N, M);
while (N < L) a[N++] = 0;
while (M < L) b[M++] = 0;
long long c[L + L] = {};
convolution(a, b, L, c);
cout << N + M - 2 << '\n';
REP(i, N + M - 1) cout << c[i] << " \n"[i + 1 == N + M - 1];
return 0;
}