結果
問題 | No.3043 括弧列の数え上げ |
ユーザー |
👑 ![]() |
提出日時 | 2025-03-02 18:35:40 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 19 ms / 2,000 ms |
コード長 | 3,421 bytes |
コンパイル時間 | 1,011 ms |
コンパイル使用メモリ | 77,292 KB |
実行使用メモリ | 8,608 KB |
最終ジャッジ日時 | 2025-03-02 18:35:44 |
合計ジャッジ時間 | 2,797 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 45 |
ソースコード
#ifdef NACHIA#define _GLIBCXX_DEBUG#else#define NDEBUG#endif#include <iostream>#include <string>#include <vector>#include <algorithm>using i64 = long long;using u64 = unsigned long long;#define rep(i,n) for(i64 i=0; i<i64(n); i++)const i64 INF = 1001001001001001001;template<typename A> void chmin(A& l, const A& r){ if(r < l) l = r; }template<typename A> void chmax(A& l, const A& r){ if(l < r) l = r; }using namespace std;#include <utility>#include <cassert>namespace nachia{// ax + by = gcd(a,b)// return ( x, - )std::pair<long long, long long> ExtGcd(long long a, long long b){long long x = 1, y = 0;while(b){long long u = a / b;std::swap(a-=b*u, b);std::swap(x-=y*u, y);}return std::make_pair(x, a);}} // namespace nachianamespace nachia{template<unsigned int MOD>struct StaticModint{private:using u64 = unsigned long long;unsigned int x;public:using my_type = StaticModint;template< class Elem >static Elem safe_mod(Elem x){if(x < 0){if(0 <= x+MOD) return x + MOD;return MOD - ((-(x+MOD)-1) % MOD + 1);}return x % MOD;}StaticModint() : x(0){}StaticModint(const my_type& a) : x(a.x){}StaticModint& operator=(const my_type&) = default;template< class Elem >StaticModint(Elem v) : x(safe_mod(v)){}unsigned int operator*() const { return x; }my_type& operator+=(const my_type& r) { auto t = x + r.x; if(t >= MOD) t -= MOD; x = t; return *this; }my_type operator+(const my_type& r) const { my_type res = *this; return res += r; }my_type& operator-=(const my_type& r) { auto t = x + MOD - r.x; if(t >= MOD) t -= MOD; x = t; return *this; }my_type operator-(const my_type& r) const { my_type res = *this; return res -= r; }my_type operator-() const noexcept { my_type res = *this; res.x = ((res.x == 0) ? 0 : (MOD - res.x)); return res; }my_type& operator*=(const my_type& r){ x = (u64)x * r.x % MOD; return *this; }my_type operator*(const my_type& r) const { my_type res = *this; return res *= r; }bool operator==(const my_type& r) const { return x == r.x; }my_type pow(unsigned long long i) const {my_type a = *this, res = 1;while(i){ if(i & 1){ res *= a; } a *= a; i >>= 1; }return res;}my_type inv() const { return my_type(ExtGcd(x, MOD).first); }unsigned int val() const { return x; }int hval() const { return int(x > MOD/2 ? x - MOD : x); }static constexpr unsigned int mod() { return MOD; }static my_type raw(unsigned int val) { auto res = my_type(); res.x = val; return res; }my_type& operator/=(const my_type& r){ return operator*=(r.inv()); }my_type operator/(const my_type& r) const { return operator*(r.inv()); }};} // namespace nachiausing Modint = nachia::StaticModint<998244353>;void testcase(){i64 N; cin >> N;if(N%2 == 1){ cout << "0\n"; return; }vector<Modint> A(N+1), B(N+1);A[0] = 1;rep(i,N){vector<Modint> C(N+1), D(N+1);rep(a,N){C[a+1] += A[a];D[a+1] += B[a] + A[a] * Modint::raw(a);C[a] += A[a+1];D[a] += B[a+1];}swap(A, C); swap(B,D);}cout << B[0].val() << "\n";}int main(){ios::sync_with_stdio(false); cin.tie(nullptr);testcase();return 0;}