結果
| 問題 |
No.3045 反復重み付き累積和
|
| コンテスト | |
| ユーザー |
Kude
|
| 提出日時 | 2025-02-28 22:47:33 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 912 ms / 5,000 ms |
| コード長 | 3,294 bytes |
| コンパイル時間 | 4,183 ms |
| コンパイル使用メモリ | 311,944 KB |
| 実行使用メモリ | 11,596 KB |
| 最終ジャッジ日時 | 2025-02-28 22:47:47 |
| 合計ジャッジ時間 | 14,249 ms |
|
ジャッジサーバーID (参考情報) |
judge6 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 41 |
コンパイルメッセージ
main.cpp:49:6: warning: ‘{anonymous}::mint {anonymous}::perm(int, int)’ defined but not used [-Wunused-function]
49 | mint perm(int n, int k) {
| ^~~~
main.cpp:48:6: warning: ‘{anonymous}::mint {anonymous}::fact(int)’ defined but not used [-Wunused-function]
48 | mint fact(int n) {return Fact[n];}
| ^~~~
main.cpp:44:6: warning: ‘{anonymous}::mint {anonymous}::icomb(int, int)’ defined but not used [-Wunused-function]
44 | mint icomb(int n, int k) {
| ^~~~~
main.cpp:37:6: warning: ‘{anonymous}::mint {anonymous}::comb(int, int)’ defined but not used [-Wunused-function]
37 | mint comb(int n, int k) {
| ^~~~
ソースコード
#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;
constexpr int FACT_SIZE = 1000000;
mint Fact[FACT_SIZE + 1];
mint iFact[FACT_SIZE + 1];
const auto fact_init = [] {
Fact[0] = mint::raw(1);
for(int i = 1; i <= FACT_SIZE; ++i) {
Fact[i] = Fact[i-1] * i;
}
iFact[FACT_SIZE] = Fact[FACT_SIZE].inv();
for(int i = FACT_SIZE; i; --i) {
iFact[i-1] = iFact[i] * i;
}
return false;
}();
mint comb(int n, int k) {
if (k == 0) return mint::raw(1);
assert(n >= 0 && k >= 0);
if (k > n) return mint::raw(0);
return Fact[n] * iFact[n - k] * iFact[k];
}
mint icomb(int n, int k) {
return iFact[n] * Fact[n - k] * Fact[k];
}
mint fact(int n) {return Fact[n];}
mint perm(int n, int k) {
assert(0 <= n);
return Fact[n] * iFact[n - k];
}
vector<mint> fps_inv(vector<mint> f, int precision=-1) {
if (precision == -1) precision = f.size();
assert(precision >= 1 && f.size() >= 1 && f[0] != 0);
auto f0 = f[0];
if (f0 != 1) {
f0 = f0.inv();
for (auto& x : f) x *= f0;
}
int sz_tgt = bit_ceil(0U + precision);
vector<mint> g(sz_tgt), g_ftt, fg;
g_ftt.reserve(sz_tgt), fg.reserve(sz_tgt);
g[0] = 1;
static_assert(mint::mod() > 1 && (mint::mod() - 1) % 4 == 0);
const mint i4 = mint::raw(mint::mod() - (mint::mod() - 1) / 4);
mint iz = -1;
for (int n = 1; n < sz_tgt; n *= 2) {
fg.assign(f.begin(), f.begin() + min<int>(2 * n, f.size())), fg.resize(2 * n);
g_ftt.assign(g.begin(), g.begin() + 2 * n);
internal::butterfly(fg), internal::butterfly(g_ftt);
for (int i = 0; i < 2 * n; i++) fg[i] *= g_ftt[i];
internal::butterfly_inv(fg);
for (int i = 0; i < n; i++) fg[i] = 0;
internal::butterfly(fg);
for (int i = 0; i < 2 * n; i++) fg[i] *= g_ftt[i];
internal::butterfly_inv(fg);
iz *= i4;
for (int i = n; i < 2 * n; i++) g[i] = fg[i] * iz;
}
g.resize(precision);
if (f0 != 1) for (auto& x : g) x *= f0;
return g;
}
} int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, q;
cin >> n >> q;
vector<mint> a(n);
rep(i, n) {
int ai;
cin >> ai;
a[i] = ai;
}
rep(_, q) {
int type;
cin >> type;
if (type == 1) {
int kint, x;
cin >> kint >> x;
mint k = kint;
vector<mint> f(n);
mint xPi = 1;
mint mki = 1;
rep(i, n) {
f[i] = xPi * iFact[i] * mki;
xPi *= x - i;
mki *= -k;
}
a = convolution(a, fps_inv(f, n));
a.resize(n);
} else {
int x;
cin >> x;
x--;
cout << a[x].val() << '\n';
}
}
}
Kude