#line 1 "library-cpp/other/template.hpp" // clang-format off #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; using uint = unsigned int; using ll = long long; using ull = unsigned long long; using i128 = __int128_t; using ld = long double; using pii = pair; using pll = pair; template using maxheap = priority_queue; template using minheap = priority_queue, greater>; template using vec = vector; template using vvec = vector>; #define OVERLOAD_REP(_1, _2, _3, name, ...) name #define REP0(n) for (auto minato = decay_t{}; minato < (n); ++minato) #define REP1(i, n) for (auto i = decay_t{}; (i) < (n); (i)++) #define REP2(i, l, r) for (auto i = (l); (i) < (r); (i)++) #define rep(...) OVERLOAD_REP(__VA_ARGS__, REP2, REP1, REP0)(__VA_ARGS__) #define OVERLOAD_RREP(_1, _2, _3, name, ...) name #define RREP1(i, n) for (auto i = (n) - 1; (i) >= decay_t{}; (i)--) #define RREP2(i, l, r) for (auto i = (r) - 1; (i) >= (l); (i)--) #define rrep(...) OVERLOAD_RREP(__VA_ARGS__, RREP2, RREP1)(__VA_ARGS__) #define ALL(x) begin(x), end(x) template int SZ(const Container& v) { return int(v.size()); } template void UNIQUE(vector& v) { v.erase(unique(v.begin(), v.end()), v.end()); } template T MAX(const vector& v) { return *max_element(v.begin(), v.end()); } template T MIN(const vector& v) { return *min_element(v.begin(), v.end()); } template T SUM(const vector& v) { return accumulate(v.begin(), v.end(), T(0)); } template T ABS(T x) { return max(x, -x); } long long floor_div(long long n, long long d) { return n / d - ((n ^ d) < 0 && n % d); } template bool chmax(T1& a, T2 b) { if (a < b) { a = b; return true; } return false; } template bool chmin(T1& a, T2 b) { if (a > b) { a = b; return true; } return false; } int topbit(ull x) { return x == 0 ? -1 : 63 - __builtin_clzll(x); } int botbit(ull x) { return x == 0 ? 64 : __builtin_ctzll(x); } int popcount(ull x) { return __builtin_popcountll(x); } int kthbit(ull x, int k) { return (x >> k) & 1; } constexpr long long TEN(int x) { return x == 0 ? 1 : TEN(x - 1) * 10; } template void rearrange(const vector& id) { (void)id; } template void rearrange_exec(const vector& id, vector& v) { vector w(v.size()); for (size_t i = 0; i < id.size(); i++) { w[i] = v[id[i]]; } v.swap(w); } template void rearrange(const vector& id, Head& a, Tail& ...tail) { rearrange_exec(id, a); rearrange(id, tail...); } istream& operator>>(istream& is, __int128_t& x) { x = 0; string s; is >> s; int n = int(s.size()), it = 0; if (s[0] == '-') it++; for (; it < n; it++) x = (x * 10 + s[it] - '0'); if (s[0] == '-') x = -x; return is; } ostream& operator<<(ostream& os, __int128_t x) { if (x == 0) return os << 0; if (x < 0) os << '-', x = -x; deque deq; while (x) deq.emplace_front(x % 10), x /= 10; for (int e : deq) os << e; return os; } template vector &operator++(vector& v) { for (auto& e : v) { e++; } return v;} template vector operator++(vector& v, int) { auto res = v; for (auto& e : v) { e++; } return res; } template vector &operator--(vector& v) { for (auto& e : v) { e--; } return v; } template vector operator--(vector& v, int) { auto res = v; for (auto& e : v) { e--; } return res; } template pair operator-(const pair& x) { return pair(-x.first, -x.second); } template pair operator-(const pair& x, const pair& y) { return pair(x.first - y.first, x.second - y.second); } template pair operator+(const pair& x, const pair& y) { return pair(x.first + y.first, x.second + y.second); } template pair operator+=(pair& l, const pair& r) { return l = l + r; } template pair operator-=(pair& l, const pair& r) { return l = l - r; } constexpr char ln = '\n'; const string YESNO[2] = {"NO", "YES"}; const string YesNo[2] = {"No", "Yes"}; void YES(bool t = true) { cout << YESNO[t] << "\n"; } void NO(bool t = 1) { YES(!t); } void Yes(bool t = true) { cout << YesNo[t] << "\n"; } void No(bool t = 1) { Yes(!t); } template void drop(T x) { cout << x << "\n"; exit(0); } #define INT(...) \ int __VA_ARGS__; \ IN(__VA_ARGS__) #define LL(...) \ ll __VA_ARGS__; \ IN(__VA_ARGS__) #define STR(...) \ string __VA_ARGS__; \ IN(__VA_ARGS__) #define CHR(...) \ char __VA_ARGS__; \ IN(__VA_ARGS__) #define LDB(...) \ long double __VA_ARGS__; \ IN(__VA_ARGS__) #define VEC(type, name, size) \ vector name(size); \ IN(name) #define VEC2(type, name1, name2, size) \ vector name1(size), name2(size); \ for (int i = 0; i < size; i++) IN(name1[i], name2[i]) #define VEC3(type, name1, name2, name3, size) \ vector name1(size), name2(size), name3(size); \ for (int i = 0; i < size; i++) IN(name1[i], name2[i], name3[i]) #define VEC4(type, name1, name2, name3, name4, size) \ vector name1(size), name2(size), name3(size), name4(size); \ for (int i = 0; i < size; i++) IN(name1[i], name2[i], name3[i], name4[i]); #define VV(type, name, N, M) \ vector> name(N, vector(M)); \ IN(name) template void scan(T& a) { cin >> a; } template void scan(vector& a) { for (auto& i : a) scan(i); } void IN() {} template void IN(Head& head, Tail&... tail) { scan(head); IN(tail...); } std::vector> read_graph(int N, int M) { std::vector> g(N); for (int i = 0; i < M; i++) { int a, b; cin >> a >> b; a--, b--; g[a].emplace_back(b); g[b].emplace_back(a); } return g; } std::vector> read_tree(int N) { return read_graph(N, N - 1); } void print() { cout << "\n"; } template void print(const vector& v) { for (auto it = v.begin(); it != v.end(); ++it) { if (it != v.begin()) { cout << " "; } cout << *it; } print(); } template void print(const T& x, const Args& ... args) { cout << x; if (sizeof...(Args)) cout << " "; print(args...); } #ifdef MINATO_LOCAL template ostream& operator<<(ostream& os, pair p); template ostream& operator<<(ostream& os, tuple t); template ostream& operator<<(ostream& os, vector v); template ostream& operator<<(ostream& os, array a); template enable_if_t>, ostream>& operator<<(ostream& os, T(&a)[N]); template ostream& operator<<(ostream& os, set s); template ostream& operator<<(ostream& os, map mp); template ostream& operator<<(ostream& os, multiset s); template ostream& operator<<(ostream& os, queue q); template ostream& operator<<(ostream& os, deque q); template ostream& operator<<(ostream& os, priority_queue q); template ostream& operator<<(ostream& os, priority_queue, greater> q); template ostream& operator<<(ostream& os, pair p) { return os << "(" << p.first << ", " << p.second << ")"; } template void debug_tuple(ostream& os, TUPLE _) { (void)os; (void)_; } template void debug_tuple(ostream &os, TUPLE t) { os << (N == 0 ? "" : ", ") << get(t); debug_tuple(os, t); } template ostream& operator<<(ostream& os, tuple t) { os << "("; debug_tuple<0, tuple, Args...>(os, t); return os << ")"; } string debug_delim(int& i) { return i++ == 0 ? "" : ", "; } #define debug_embrace(x) { int i = 0; os << "{"; { x } return os << "}"; } template ostream& operator<<(ostream& os, vector v) { debug_embrace( for (T e : v) { os << debug_delim(i) << e; } ) } template ostream& operator<<(ostream& os, array a) { debug_embrace( for (T e : a) { os << debug_delim(i) << e; } ) } template enable_if_t>, ostream>& operator<<(ostream& os, T(&a)[N]) { debug_embrace( for (T e : a) { os << debug_delim(i) << e; } ) } template ostream& operator<<(ostream& os, set s) { debug_embrace( for (Key e : s) { os << debug_delim(i) << e; }) } template ostream& operator<<(ostream& os, map mp) { debug_embrace( for (auto e : mp) { os << debug_delim(i) << e; }) } template ostream& operator<<(ostream& os, multiset s) { debug_embrace( for (Key e : s) { os << debug_delim(i) << e; }) } template ostream& operator<<(ostream& os, queue q) { debug_embrace( for (; !q.empty(); q.pop()) { os << debug_delim(i) << q.front(); } ) } template ostream& operator<<(ostream& os, deque q) { debug_embrace( for (T e : q) { os << debug_delim(i) << e; } ) } template ostream& operator<<(ostream& os, priority_queue q) { debug_embrace( for (; !q.empty(); q.pop()) { os << debug_delim(i) << q.top(); } ) } template ostream& operator<<(ostream& os, priority_queue, greater> q) { debug_embrace( for (; !q.empty(); q.pop()) { os << debug_delim(i) << q.top(); } ) } void debug_out() { cerr << endl; } template void debug_out(const T& x, const Args& ... args) { cerr << " " << x; debug_out(args...); } #define debug(...) cerr << __LINE__ << " : [" << #__VA_ARGS__ << "] =", debug_out(__VA_ARGS__) #else #define debug(...) (void(0)) #endif /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // clang-format on #line 2 "library-cpp/mod/FormalPowerSeriesNTTFriendly.hpp" #line 8 "library-cpp/mod/FormalPowerSeriesNTTFriendly.hpp" #include template struct FormalPowerSeriesNTTFriendly : std::vector { using std::vector::vector; using FPS = FormalPowerSeriesNTTFriendly; FPS static read(int n) { FPS ret(n); for (int i = 0; i < n; i++) { long long x; std::cin >> x; ret[i] = x; } return ret; } M freq(int p) const { return p < (int)this->size() ? (*this)[p] : M(0); } void shrink() { while (!this->empty() and this->back().val() == 0) this->pop_back(); } FPS pre(int le) const { return FPS(this->begin(), this->begin() + std::min((int)this->size(), le)); } FPS rev() const { FPS ret(*this); std::reverse(ret.begin(), ret.end()); return ret; } int count_nonzero() const { return std::count_if(this->begin(), this->end(), [](M x) { return x.val() != 0; }); } std::vector> get_sparse() const { std::vector> ret; for (size_t i = 0; i < this->size(); i++) { if ((*this)[i].val() != 0) ret.emplace_back(i, (*this)[i]); } return ret; } FPS operator>>(int s) const { if ((int)this->size() <= s) return {}; return FPS(this->begin() + s, this->end()); } FPS operator<<(int s) const { if (this->empty()) return {}; FPS ret(*this); ret.insert(ret.begin(), s, M(0)); return ret; } FPS& operator+=(const FPS& r) { if (r.size() > this->size()) this->resize(r.size()); for (size_t i = 0; i < r.size(); i++) (*this)[i] += r[i]; shrink(); return *this; } FPS& operator+=(const M& v) { if (this->empty()) this->resize(1); (*this)[0] += v; shrink(); return *this; } FPS& operator-=(const FPS& r) { if (r.size() > this->size()) this->resize(r.size()); for (int i = 0; i < int(r.size()); i++) (*this)[i] -= r[i]; shrink(); return *this; } FPS& operator-=(const M& v) { if (this->empty()) this->resize(1); (*this)[0] -= v; shrink(); return *this; } FPS& operator*=(const FPS& r) { const int z = r.count_nonzero(); if (z == 0) { this->clear(); return *this; } if (z <= SPARSE) { auto sparse = r.get_sparse(); return *this *= sparse; } auto res = atcoder::convolution(*this, r); return *this = {res.begin(), res.end()}; } FPS& operator*=(const M& v) { for (auto& x : (*this)) x *= v; shrink(); return *this; } FPS& operator*=(const std::vector>& r) { assert(!r.empty()); const int m = r.back().first; FPS ret(this->size() + m); for (int i = 0; i < (int)this->size(); i++) { for (const auto& [j, c] : r) { ret[i + j] += (*this)[i] * c; } } ret.shrink(); return *this = ret; } FPS& operator/=(const FPS& r) { if (this->size() < r.size()) { this->clear(); return *this; } const int z = r.count_nonzero(); assert(z != 0); if (z <= SPARSE) { auto sparse = r.get_sparse(); return *this /= sparse; } int n = this->size() - r.size() + 1; return *this = (rev().pre(n) * r.rev().inv(n)).pre(n).rev(); } FPS& operator/=(const M& v) { assert(v.val() != 0); auto vinv = v.inv(); for (auto& x : (*this)) x *= vinv; return *this; } FPS& operator/=(const std::vector>& r) { assert(!r.empty()); auto [j0, c0] = r.front(); assert(j0 == 0 && c0.val() != 0); auto ic = c0.inv(); FPS ret(this->size()); for (int i = 0; i < (int)this->size(); i++) { for (const auto& [j, c] : r) { if (j >= 1 && j <= i) { ret[i] -= ret[i - j] * c; } } ret[i] += (*this)[i]; ret[i] *= ic; } ret.shrink(); return *this = ret; } FPS& operator%=(const FPS& r) { *this -= *this / r * r; shrink(); return *this; } FPS operator+(const FPS& r) const { return FPS(*this) += r; } FPS operator+(const M& v) const { return FPS(*this) += v; } FPS operator-(const FPS& r) const { return FPS(*this) -= r; } FPS operator-(const M& v) const { return FPS(*this) -= v; } FPS operator*(const FPS& r) const { return FPS(*this) *= r; } FPS operator*(const M& v) const { return FPS(*this) *= v; } FPS operator/(const FPS& r) const { return FPS(*this) /= r; } FPS operator%(const FPS& r) const { return FPS(*this) %= r; } FPS operator-() const { FPS ret = *this; for (auto& v : ret) v = -v; return ret; } FPS differential() const { const int n = (int)this->size(); FPS ret(std::max(0, n - 1)); for (int i = 1; i < n; i++) ret[i - 1] = (*this)[i] * M(i); return ret; } FPS integral() const { const int n = (int)this->size(); FPS ret(n + 1); ret[0] = M(0); if (n > 0) ret[1] = M(1); auto mod = M::mod(); for (int i = 2; i <= n; i++) ret[i] = -ret[mod % i] * (mod / i); for (int i = 0; i < n; i++) ret[i + 1] *= (*this)[i]; return ret; } FPS inv(int deg = -1) const { assert((*this)[0] != M(0)); const int n = (int)this->size(); if (deg == -1) deg = n; FPS ret{(*this)[0].inv()}; ret.reserve(deg); for (int d = 1; d < deg; d <<= 1) { FPS f(d << 1), g(d << 1); std::copy(this->begin(), this->begin() + std::min(n, d << 1), f.begin()); std::copy(ret.begin(), ret.end(), g.begin()); atcoder::internal::butterfly(f); atcoder::internal::butterfly(g); for (int i = 0; i < (d << 1); i++) f[i] *= g[i]; atcoder::internal::butterfly_inv(f); std::fill(f.begin(), f.begin() + d, M(0)); atcoder::internal::butterfly(f); for (int i = 0; i < (d << 1); i++) f[i] *= g[i]; atcoder::internal::butterfly_inv(f); M iz = M(d << 1).inv(); iz *= -iz; for (int i = d; i < std::min(d << 1, deg); i++) ret.push_back(f[i] * iz); } return ret.pre(deg); } FPS log(int deg = -1) const { assert((*this)[0] == M(1)); if (deg == -1) deg = (int)this->size(); return (differential() * inv(deg)).pre(deg - 1).integral(); } FPS sqrt(const std::function& get_sqrt, int deg = -1) const { const int n = this->size(); if (deg == -1) deg = n; if (this->empty()) return FPS(deg, 0); if ((*this)[0] == M(0)) { for (int i = 1; i < n; i++) { if ((*this)[i] != M(0)) { if (i & 1) return {}; if (deg - i / 2 <= 0) break; auto ret = (*this >> i).sqrt(get_sqrt, deg - i / 2); if (ret.empty()) return {}; ret = ret << (i / 2); if ((int)ret.size() < deg) ret.resize(deg, M(0)); return ret; } } return FPS(deg, M(0)); } auto sqrtf0 = M(get_sqrt((*this)[0])); if (sqrtf0 * sqrtf0 != (*this)[0]) return {}; FPS ret{sqrtf0}; M inv2 = M(2).inv(); for (int i = 1; i < deg; i <<= 1) ret = (ret + pre(i << 1) * ret.inv(i << 1)) * inv2; return ret.pre(deg); } FPS exp(int deg = -1) const { assert(this->empty() or (*this)[0] == M(0)); if (this->size() <= 1) return {M(1)}; if (deg == -1) deg = (int)this->size(); FPS inv; inv.reserve(deg + 1); inv.push_back(M(0)); inv.push_back(M(1)); auto inplace_integral = [&](FPS& F) -> void { const int n = (int)F.size(); auto mod = M::mod(); while ((int)inv.size() <= n) { int i = inv.size(); inv.push_back(-inv[mod % i] * (mod / i)); } F.insert(F.begin(), M(0)); for (int i = 1; i <= n; i++) F[i] *= inv[i]; }; auto inplace_differential = [](FPS& F) -> void { if (F.empty()) return; F.erase(F.begin()); for (size_t i = 0; i < F.size(); i++) F[i] *= M(i + 1); }; FPS f{1, (*this)[1]}, g{M(1)}, g_fft{M(1), M(1)}; for (int m = 2; m < deg; m <<= 1) { const M iz1 = M(m).inv(), iz2 = M(m << 1).inv(); auto f_fft = f; f_fft.resize(m << 1); atcoder::internal::butterfly(f_fft); { FPS _g(m); for (int i = 0; i < m; i++) _g[i] = f_fft[i] * g_fft[i]; atcoder::internal::butterfly_inv(_g); std::fill(_g.begin(), _g.begin() + (m >> 1), M(0)); atcoder::internal::butterfly(_g); for (int i = 0; i < m; i++) _g[i] *= -g_fft[i] * iz1 * iz1; atcoder::internal::butterfly_inv(_g); g.insert(g.end(), _g.begin() + (m >> 1), _g.end()); g_fft = g; g_fft.resize(m << 1); atcoder::internal::butterfly(g_fft); } FPS x(this->begin(), this->begin() + std::min((int)this->size(), m)); { x.resize(m); inplace_differential(x); x.push_back(M(0)); atcoder::internal::butterfly(x); } { for (int i = 0; i < m; i++) x[i] *= f_fft[i] * iz1; atcoder::internal::butterfly_inv(x); } { x -= f.differential(); x.resize(m << 1); for (int i = 0; i < m - 1; i++) x[m + i] = x[i], x[i] = M(0); atcoder::internal::butterfly(x); for (int i = 0; i < (m << 1); i++) x[i] *= g_fft[i] * iz2; atcoder::internal::butterfly_inv(x); } { x.pop_back(); inplace_integral(x); for (int i = m; i < std::min((int)this->size(), m << 1); i++) x[i] += (*this)[i]; std::fill(x.begin(), x.begin() + m, M(0)); } { atcoder::internal::butterfly(x); for (int i = 0; i < (m << 1); i++) x[i] *= f_fft[i] * iz2; atcoder::internal::butterfly_inv(x); f.insert(f.end(), x.begin() + m, x.end()); } } return FPS{f.begin(), f.begin() + deg}; } FPS pow(int64_t k, int deg = -1) const { const int n = (int)this->size(); if (deg == -1) deg = n; if (k == 0) { auto res = FPS(deg, M(0)); res[0] = M(1); return res; } for (int i = 0; i < n; i++) { if ((*this)[i] != M(0)) { if (i >= (deg + k - 1) / k) return FPS(deg, M(0)); M rev = (*this)[i].inv(); FPS ret = (((*this * rev) >> i).log(deg) * k).exp(deg) * ((*this)[i].pow(k)); ret = (ret << (i * k)).pre(deg); if ((int)ret.size() < deg) ret.resize(deg, M(0)); return ret; } } return FPS(deg, M(0)); } M eval(M x) const { M ret = 0, w = 1; for (const auto& v : *this) ret += w * v, w *= x; return ret; } }; template void print(const FormalPowerSeriesNTTFriendly& v) { for (size_t i = 0; i < v.size(); i++) { if (i) std::cout << " "; std::cout << v[i].val(); } cout << "\n"; } #line 3 "G.cpp" #include using mint = atcoder::modint998244353; using FPS = FormalPowerSeriesNTTFriendly; void solve() { INT(P1, P2, Q1, Q2, T); mint P = mint(P1) / P2; mint Q = mint(Q1) / Q2; vec QX(T + 1); rep(i, T + 1) { QX[i] = Q.pow(1LL * (i + 1) * i / 2); } FPS f(T + 1), g(T + 1); f[0] = 1; rep(i, 1, T + 1) { f[i] -= QX[i - 1] * P; } rep(i, T + 1) { g[i] = QX[i]; } auto h = f.inv() * g; mint ans = h.freq(T); print(ans.val()); } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); cerr << fixed << setprecision(7); int T = 1; // cin >> T; for (int test_case = 1; test_case <= T; test_case++) { // debug(test_case); solve(); } }