/** * date : 2020-10-23 23:40:41 */ #pragma region kyopro_template #define Nyaan_template #include #include #define pb push_back #define eb emplace_back #define fi first #define se second #define each(x, v) for (auto &x : v) #define all(v) (v).begin(), (v).end() #define sz(v) ((int)(v).size()) #define mem(a, val) memset(a, val, sizeof(a)) #define ini(...) \ int __VA_ARGS__; \ in(__VA_ARGS__) #define inl(...) \ long long __VA_ARGS__; \ in(__VA_ARGS__) #define ins(...) \ string __VA_ARGS__; \ in(__VA_ARGS__) #define inc(...) \ char __VA_ARGS__; \ in(__VA_ARGS__) #define in2(s, t) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i]); \ } #define in3(s, t, u) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i], u[i]); \ } #define in4(s, t, u, v) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i], u[i], v[i]); \ } #define rep(i, N) for (long long i = 0; i < (long long)(N); i++) #define repr(i, N) for (long long i = (long long)(N)-1; i >= 0; i--) #define rep1(i, N) for (long long i = 1; i <= (long long)(N); i++) #define repr1(i, N) for (long long i = (N); (long long)(i) > 0; i--) #define reg(i, a, b) for (long long i = (a); i < (b); i++) #define die(...) \ do { \ out(__VA_ARGS__); \ return; \ } while (0) using namespace std; using ll = long long; template using V = vector; using vi = vector; using vl = vector; using vvi = vector>; using vd = V; using vs = V; using vvl = vector>; using P = pair; using vp = vector

; using pii = pair; using vpi = vector>; constexpr int inf = 1001001001; constexpr long long infLL = (1LL << 61) - 1; template inline bool amin(T &x, U y) { return (y < x) ? (x = y, true) : false; } template inline bool amax(T &x, U y) { return (x < y) ? (x = y, true) : false; } template ostream &operator<<(ostream &os, const pair &p) { os << p.first << " " << p.second; return os; } template istream &operator>>(istream &is, pair &p) { is >> p.first >> p.second; return is; } template ostream &operator<<(ostream &os, const vector &v) { int s = (int)v.size(); for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i]; return os; } template istream &operator>>(istream &is, vector &v) { for (auto &x : v) is >> x; return is; } void in() {} template void in(T &t, U &... u) { cin >> t; in(u...); } void out() { cout << "\n"; } template void out(const T &t, const U &... u) { cout << t; if (sizeof...(u)) cout << " "; out(u...); } #ifdef NyaanDebug #define trc(...) \ do { \ cerr << #__VA_ARGS__ << " = "; \ dbg_out(__VA_ARGS__); \ } while (0) #define trca(v, N) \ do { \ cerr << #v << " = "; \ array_out(v, N); \ } while (0) #define trcc(v) \ do { \ cerr << #v << " = {"; \ each(x, v) { cerr << " " << x << ","; } \ cerr << "}" << endl; \ } while (0) template void _cout(const T &c) { cerr << c; } void _cout(const int &c) { if (c == 1001001001) cerr << "inf"; else if (c == -1001001001) cerr << "-inf"; else cerr << c; } void _cout(const unsigned int &c) { if (c == 1001001001) cerr << "inf"; else cerr << c; } void _cout(const long long &c) { if (c == 1001001001 || c == (1LL << 61) - 1) cerr << "inf"; else if (c == -1001001001 || c == -((1LL << 61) - 1)) cerr << "-inf"; else cerr << c; } void _cout(const unsigned long long &c) { if (c == 1001001001 || c == (1LL << 61) - 1) cerr << "inf"; else cerr << c; } template void _cout(const pair &p) { cerr << "{ "; _cout(p.fi); cerr << ", "; _cout(p.se); cerr << " } "; } template void _cout(const vector &v) { int s = v.size(); cerr << "{ "; for (int i = 0; i < s; i++) { cerr << (i ? ", " : ""); _cout(v[i]); } cerr << " } "; } template void _cout(const vector> &v) { cerr << "[ "; for (const auto &x : v) { cerr << endl; _cout(x); cerr << ", "; } cerr << endl << " ] "; } void dbg_out() { cerr << endl; } template void dbg_out(const T &t, const U &... u) { _cout(t); if (sizeof...(u)) cerr << ", "; dbg_out(u...); } template void array_out(const T &v, int s) { cerr << "{ "; for (int i = 0; i < s; i++) { cerr << (i ? ", " : ""); _cout(v[i]); } cerr << " } " << endl; } template void array_out(const T &v, int H, int W) { cerr << "[ "; for (int i = 0; i < H; i++) { cerr << (i ? ", " : ""); array_out(v[i], W); } cerr << " ] " << endl; } #else #define trc(...) #define trca(...) #define trcc(...) #endif inline int popcnt(unsigned long long a) { return __builtin_popcountll(a); } inline int lsb(unsigned long long a) { return __builtin_ctzll(a); } inline int msb(unsigned long long a) { return 63 - __builtin_clzll(a); } template inline int getbit(T a, int i) { return (a >> i) & 1; } template inline void setbit(T &a, int i) { a |= (1LL << i); } template inline void delbit(T &a, int i) { a &= ~(1LL << i); } template int lb(const vector &v, const T &a) { return lower_bound(begin(v), end(v), a) - begin(v); } template int ub(const vector &v, const T &a) { return upper_bound(begin(v), end(v), a) - begin(v); } template int btw(T a, T x, T b) { return a <= x && x < b; } template T ceil(T a, U b) { return (a + b - 1) / b; } constexpr long long TEN(int n) { long long ret = 1, x = 10; while (n) { if (n & 1) ret *= x; x *= x; n >>= 1; } return ret; } template vector mkrui(const vector &v) { vector ret(v.size() + 1); for (int i = 0; i < int(v.size()); i++) ret[i + 1] = ret[i] + v[i]; return ret; }; template vector mkuni(const vector &v) { vector ret(v); sort(ret.begin(), ret.end()); ret.erase(unique(ret.begin(), ret.end()), ret.end()); return ret; } template vector mkord(int N, F f) { vector ord(N); iota(begin(ord), end(ord), 0); sort(begin(ord), end(ord), f); return ord; } template vector mkiota(int N) { vector ret(N); iota(begin(ret), end(ret), 0); return ret; } template vector mkinv(vector &v) { vector inv(v.size()); for (int i = 0; i < (int)v.size(); i++) inv[v[i]] = i; return inv; } struct IoSetupNya { IoSetupNya() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); cerr << fixed << setprecision(7); } } iosetupnya; void solve(); int main() { solve(); } #pragma endregion using namespace std; template struct LazyMontgomeryModInt { using mint = LazyMontgomeryModInt; using i32 = int32_t; using u32 = uint32_t; using u64 = uint64_t; static constexpr u32 get_r() { u32 ret = mod; for (i32 i = 0; i < 4; ++i) ret *= 2 - mod * ret; return ret; } static constexpr u32 r = get_r(); static constexpr u32 n2 = -u64(mod) % mod; static_assert(r * mod == 1, "invalid, r * mod != 1"); static_assert(mod < (1 << 30), "invalid, mod >= 2 ^ 30"); static_assert((mod & 1) == 1, "invalid, mod % 2 == 0"); u32 a; constexpr LazyMontgomeryModInt() : a(0) {} constexpr LazyMontgomeryModInt(const int64_t &b) : a(reduce(u64(b % mod + mod) * n2)){}; static constexpr u32 reduce(const u64 &b) { return (b + u64(u32(b) * u32(-r)) * mod) >> 32; } constexpr mint &operator+=(const mint &b) { if (i32(a += b.a - 2 * mod) < 0) a += 2 * mod; return *this; } constexpr mint &operator-=(const mint &b) { if (i32(a -= b.a) < 0) a += 2 * mod; return *this; } constexpr mint &operator*=(const mint &b) { a = reduce(u64(a) * b.a); return *this; } constexpr mint &operator/=(const mint &b) { *this *= b.inverse(); return *this; } constexpr mint operator+(const mint &b) const { return mint(*this) += b; } constexpr mint operator-(const mint &b) const { return mint(*this) -= b; } constexpr mint operator*(const mint &b) const { return mint(*this) *= b; } constexpr mint operator/(const mint &b) const { return mint(*this) /= b; } constexpr bool operator==(const mint &b) const { return (a >= mod ? a - mod : a) == (b.a >= mod ? b.a - mod : b.a); } constexpr bool operator!=(const mint &b) const { return (a >= mod ? a - mod : a) != (b.a >= mod ? b.a - mod : b.a); } constexpr mint operator-() const { return mint() - mint(*this); } constexpr mint pow(u64 n) const { mint ret(1), mul(*this); while (n > 0) { if (n & 1) ret *= mul; mul *= mul; n >>= 1; } return ret; } constexpr mint inverse() const { return pow(mod - 2); } friend ostream &operator<<(ostream &os, const mint &b) { return os << b.get(); } friend istream &operator>>(istream &is, mint &b) { int64_t t; is >> t; b = LazyMontgomeryModInt(t); return (is); } constexpr u32 get() const { u32 ret = reduce(a); return ret >= mod ? ret - mod : ret; } static constexpr u32 get_mod() { return mod; } }; using mint = LazyMontgomeryModInt<1000000007>; using vm = V; using vvm = V; using namespace std; using namespace std; using namespace std; using namespace std; __attribute__((target("sse4.2"))) __attribute__((always_inline)) __m128i my128_mullo_epu32(const __m128i &a, const __m128i &b) { return _mm_mullo_epi32(a, b); } __attribute__((target("sse4.2"))) __attribute__((always_inline)) __m128i my128_mulhi_epu32(const __m128i &a, const __m128i &b) { __m128i a13 = _mm_shuffle_epi32(a, 0xF5); __m128i b13 = _mm_shuffle_epi32(b, 0xF5); __m128i prod02 = _mm_mul_epu32(a, b); __m128i prod13 = _mm_mul_epu32(a13, b13); __m128i prod = _mm_unpackhi_epi64(_mm_unpacklo_epi32(prod02, prod13), _mm_unpackhi_epi32(prod02, prod13)); return prod; } __attribute__((target("sse4.2"))) __attribute__((always_inline)) __m128i montgomery_mul_128(const __m128i &a, const __m128i &b, const __m128i &r, const __m128i &m1) { return _mm_sub_epi32( _mm_add_epi32(my128_mulhi_epu32(a, b), m1), my128_mulhi_epu32(my128_mullo_epu32(my128_mullo_epu32(a, b), r), m1)); } __attribute__((target("sse4.2"))) __attribute__((always_inline)) __m128i montgomery_add_128(const __m128i &a, const __m128i &b, const __m128i &m2, const __m128i &m0) { __m128i ret = _mm_sub_epi32(_mm_add_epi32(a, b), m2); return _mm_add_epi32(_mm_and_si128(_mm_cmpgt_epi32(m0, ret), m2), ret); } __attribute__((target("sse4.2"))) __attribute__((always_inline)) __m128i montgomery_sub_128(const __m128i &a, const __m128i &b, const __m128i &m2, const __m128i &m0) { __m128i ret = _mm_sub_epi32(a, b); return _mm_add_epi32(_mm_and_si128(_mm_cmpgt_epi32(m0, ret), m2), ret); } __attribute__((target("avx2"))) __attribute__((always_inline)) __m256i my256_mullo_epu32(const __m256i &a, const __m256i &b) { return _mm256_mullo_epi32(a, b); } __attribute__((target("avx2"))) __attribute__((always_inline)) __m256i my256_mulhi_epu32(const __m256i &a, const __m256i &b) { __m256i a13 = _mm256_shuffle_epi32(a, 0xF5); __m256i b13 = _mm256_shuffle_epi32(b, 0xF5); __m256i prod02 = _mm256_mul_epu32(a, b); __m256i prod13 = _mm256_mul_epu32(a13, b13); __m256i prod = _mm256_unpackhi_epi64(_mm256_unpacklo_epi32(prod02, prod13), _mm256_unpackhi_epi32(prod02, prod13)); return prod; } __attribute__((target("avx2"))) __attribute__((always_inline)) __m256i montgomery_mul_256(const __m256i &a, const __m256i &b, const __m256i &r, const __m256i &m1) { return _mm256_sub_epi32( _mm256_add_epi32(my256_mulhi_epu32(a, b), m1), my256_mulhi_epu32(my256_mullo_epu32(my256_mullo_epu32(a, b), r), m1)); } __attribute__((target("avx2"))) __attribute__((always_inline)) __m256i montgomery_add_256(const __m256i &a, const __m256i &b, const __m256i &m2, const __m256i &m0) { __m256i ret = _mm256_sub_epi32(_mm256_add_epi32(a, b), m2); return _mm256_add_epi32(_mm256_and_si256(_mm256_cmpgt_epi32(m0, ret), m2), ret); } __attribute__((target("avx2"))) __attribute__((always_inline)) __m256i montgomery_sub_256(const __m256i &a, const __m256i &b, const __m256i &m2, const __m256i &m0) { __m256i ret = _mm256_sub_epi32(a, b); return _mm256_add_epi32(_mm256_and_si256(_mm256_cmpgt_epi32(m0, ret), m2), ret); } constexpr int SZ_FFT_BUF = 1 << 23; uint32_t buf1_[SZ_FFT_BUF] __attribute__((aligned(64))); uint32_t buf2_[SZ_FFT_BUF] __attribute__((aligned(64))); template struct NTT { static constexpr uint32_t get_pr() { uint32_t mod = mint::get_mod(); using u64 = uint64_t; u64 ds[32] = {}; int idx = 0; u64 m = mod - 1; for (u64 i = 2; i * i <= m; ++i) { if (m % i == 0) { ds[idx++] = i; while (m % i == 0) m /= i; } } if (m != 1) ds[idx++] = m; uint32_t pr = 2; while (1) { int flg = 1; for (int i = 0; i < idx; ++i) { u64 a = pr, b = (mod - 1) / ds[i], r = 1; while (b) { if (b & 1) r = r * a % mod; a = a * a % mod; b >>= 1; } if (r == 1) { flg = 0; break; } } if (flg == 1) break; ++pr; } return pr; }; static constexpr uint32_t mod = mint::get_mod(); static constexpr uint32_t pr = get_pr(); static constexpr int level = __builtin_ctzll(mod - 1); mint dw[level], dy[level]; mint *buf1, *buf2; constexpr NTT() { setwy(level); buf1 = reinterpret_cast(::buf1_); buf2 = reinterpret_cast(::buf2_); } constexpr void setwy(int k) { mint w[level], y[level]; w[k - 1] = mint(pr).pow((mod - 1) / (1 << k)); y[k - 1] = w[k - 1].inverse(); for (int i = k - 2; i > 0; --i) w[i] = w[i + 1] * w[i + 1], y[i] = y[i + 1] * y[i + 1]; dw[0] = dy[0] = w[1] * w[1]; dw[1] = w[1], dy[1] = y[1], dw[2] = w[2], dy[2] = y[2]; for (int i = 3; i < k; ++i) { dw[i] = dw[i - 1] * y[i - 2] * w[i]; dy[i] = dy[i - 1] * w[i - 2] * y[i]; } } __attribute__((target("avx2"))) void ntt(mint *a, int n) { int k = n ? __builtin_ctz(n) : 0; if (k == 0) return; if (k == 1) { mint a1 = a[1]; a[1] = a[0] - a[1]; a[0] = a[0] + a1; return; } if (k & 1) { int v = 1 << (k - 1); if (v < 8) { for (int j = 0; j < v; ++j) { mint ajv = a[j + v]; a[j + v] = a[j] - ajv; a[j] += ajv; } } else { const __m256i m0 = _mm256_set1_epi32(0); const __m256i m2 = _mm256_set1_epi32(mod + mod); int j0 = 0; int j1 = v; for (; j0 < v; j0 += 8, j1 += 8) { __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); __m256i naj = montgomery_add_256(T0, T1, m2, m0); __m256i najv = montgomery_sub_256(T0, T1, m2, m0); _mm256_storeu_si256((__m256i *)(a + j0), naj); _mm256_storeu_si256((__m256i *)(a + j1), najv); } } } int u = 1 << (2 + (k & 1)); int v = 1 << (k - 2 - (k & 1)); mint one = mint(1); mint imag = dw[1]; while (v) { if (v == 1) { mint ww = one, xx = one, wx = one; for (int jh = 0; jh < u;) { ww = xx * xx, wx = ww * xx; mint t0 = a[jh + 0], t1 = a[jh + 1] * xx; mint t2 = a[jh + 2] * ww, t3 = a[jh + 3] * wx; mint t0p2 = t0 + t2, t1p3 = t1 + t3; mint t0m2 = t0 - t2, t1m3 = (t1 - t3) * imag; a[jh + 0] = t0p2 + t1p3, a[jh + 1] = t0p2 - t1p3; a[jh + 2] = t0m2 + t1m3, a[jh + 3] = t0m2 - t1m3; xx *= dw[__builtin_ctz((jh += 4))]; } } else if (v == 4) { const __m128i m0 = _mm_set1_epi32(0); const __m128i m1 = _mm_set1_epi32(mod); const __m128i m2 = _mm_set1_epi32(mod + mod); const __m128i r = _mm_set1_epi32(mint::r); const __m128i Imag = _mm_set1_epi32(imag.a); mint ww = one, xx = one, wx = one; for (int jh = 0; jh < u;) { if (jh == 0) { int j0 = 0; int j1 = v; int j2 = j1 + v; int j3 = j2 + v; int je = v; for (; j0 < je; j0 += 4, j1 += 4, j2 += 4, j3 += 4) { const __m128i T0 = _mm_loadu_si128((__m128i *)(a + j0)); const __m128i T1 = _mm_loadu_si128((__m128i *)(a + j1)); const __m128i T2 = _mm_loadu_si128((__m128i *)(a + j2)); const __m128i T3 = _mm_loadu_si128((__m128i *)(a + j3)); const __m128i T0P2 = montgomery_add_128(T0, T2, m2, m0); const __m128i T1P3 = montgomery_add_128(T1, T3, m2, m0); const __m128i T0M2 = montgomery_sub_128(T0, T2, m2, m0); const __m128i T1M3 = montgomery_mul_128( montgomery_sub_128(T1, T3, m2, m0), Imag, r, m1); _mm_storeu_si128((__m128i *)(a + j0), montgomery_add_128(T0P2, T1P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j1), montgomery_sub_128(T0P2, T1P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j2), montgomery_add_128(T0M2, T1M3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j3), montgomery_sub_128(T0M2, T1M3, m2, m0)); } } else { ww = xx * xx, wx = ww * xx; const __m128i WW = _mm_set1_epi32(ww.a); const __m128i WX = _mm_set1_epi32(wx.a); const __m128i XX = _mm_set1_epi32(xx.a); int j0 = jh * v; int j1 = j0 + v; int j2 = j1 + v; int j3 = j2 + v; int je = j1; for (; j0 < je; j0 += 4, j1 += 4, j2 += 4, j3 += 4) { const __m128i T0 = _mm_loadu_si128((__m128i *)(a + j0)); const __m128i T1 = _mm_loadu_si128((__m128i *)(a + j1)); const __m128i T2 = _mm_loadu_si128((__m128i *)(a + j2)); const __m128i T3 = _mm_loadu_si128((__m128i *)(a + j3)); const __m128i MT1 = montgomery_mul_128(T1, XX, r, m1); const __m128i MT2 = montgomery_mul_128(T2, WW, r, m1); const __m128i MT3 = montgomery_mul_128(T3, WX, r, m1); const __m128i T0P2 = montgomery_add_128(T0, MT2, m2, m0); const __m128i T1P3 = montgomery_add_128(MT1, MT3, m2, m0); const __m128i T0M2 = montgomery_sub_128(T0, MT2, m2, m0); const __m128i T1M3 = montgomery_mul_128( montgomery_sub_128(MT1, MT3, m2, m0), Imag, r, m1); _mm_storeu_si128((__m128i *)(a + j0), montgomery_add_128(T0P2, T1P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j1), montgomery_sub_128(T0P2, T1P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j2), montgomery_add_128(T0M2, T1M3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j3), montgomery_sub_128(T0M2, T1M3, m2, m0)); } } xx *= dw[__builtin_ctz((jh += 4))]; } } else { const __m256i m0 = _mm256_set1_epi32(0); const __m256i m1 = _mm256_set1_epi32(mod); const __m256i m2 = _mm256_set1_epi32(mod + mod); const __m256i r = _mm256_set1_epi32(mint::r); const __m256i Imag = _mm256_set1_epi32(imag.a); mint ww = one, xx = one, wx = one; for (int jh = 0; jh < u;) { if (jh == 0) { int j0 = 0; int j1 = v; int j2 = j1 + v; int j3 = j2 + v; int je = v; for (; j0 < je; j0 += 8, j1 += 8, j2 += 8, j3 += 8) { const __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); const __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); const __m256i T2 = _mm256_loadu_si256((__m256i *)(a + j2)); const __m256i T3 = _mm256_loadu_si256((__m256i *)(a + j3)); const __m256i T0P2 = montgomery_add_256(T0, T2, m2, m0); const __m256i T1P3 = montgomery_add_256(T1, T3, m2, m0); const __m256i T0M2 = montgomery_sub_256(T0, T2, m2, m0); const __m256i T1M3 = montgomery_mul_256( montgomery_sub_256(T1, T3, m2, m0), Imag, r, m1); _mm256_storeu_si256((__m256i *)(a + j0), montgomery_add_256(T0P2, T1P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j1), montgomery_sub_256(T0P2, T1P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j2), montgomery_add_256(T0M2, T1M3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j3), montgomery_sub_256(T0M2, T1M3, m2, m0)); } } else { ww = xx * xx, wx = ww * xx; const __m256i WW = _mm256_set1_epi32(ww.a); const __m256i WX = _mm256_set1_epi32(wx.a); const __m256i XX = _mm256_set1_epi32(xx.a); int j0 = jh * v; int j1 = j0 + v; int j2 = j1 + v; int j3 = j2 + v; int je = j1; for (; j0 < je; j0 += 8, j1 += 8, j2 += 8, j3 += 8) { const __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); const __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); const __m256i T2 = _mm256_loadu_si256((__m256i *)(a + j2)); const __m256i T3 = _mm256_loadu_si256((__m256i *)(a + j3)); const __m256i MT1 = montgomery_mul_256(T1, XX, r, m1); const __m256i MT2 = montgomery_mul_256(T2, WW, r, m1); const __m256i MT3 = montgomery_mul_256(T3, WX, r, m1); const __m256i T0P2 = montgomery_add_256(T0, MT2, m2, m0); const __m256i T1P3 = montgomery_add_256(MT1, MT3, m2, m0); const __m256i T0M2 = montgomery_sub_256(T0, MT2, m2, m0); const __m256i T1M3 = montgomery_mul_256( montgomery_sub_256(MT1, MT3, m2, m0), Imag, r, m1); _mm256_storeu_si256((__m256i *)(a + j0), montgomery_add_256(T0P2, T1P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j1), montgomery_sub_256(T0P2, T1P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j2), montgomery_add_256(T0M2, T1M3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j3), montgomery_sub_256(T0M2, T1M3, m2, m0)); } } xx *= dw[__builtin_ctz((jh += 4))]; } } u <<= 2; v >>= 2; } } __attribute__((target("avx2"))) void intt(mint *a, int n, int normalize = true) { int k = n ? __builtin_ctz(n) : 0; if (k == 0) return; if (k == 1) { mint a1 = a[1]; a[1] = a[0] - a[1]; a[0] = a[0] + a1; if (normalize) { a[0] *= mint(2).inverse(); a[1] *= mint(2).inverse(); } return; } int u = 1 << (k - 2); int v = 1; mint one = mint(1); mint imag = dy[1]; while (u) { if (v == 1) { mint ww = one, xx = one, yy = one; u <<= 2; for (int jh = 0; jh < u;) { ww = xx * xx, yy = xx * imag; mint t0 = a[jh + 0], t1 = a[jh + 1]; mint t2 = a[jh + 2], t3 = a[jh + 3]; mint t0p1 = t0 + t1, t2p3 = t2 + t3; mint t0m1 = (t0 - t1) * xx, t2m3 = (t2 - t3) * yy; a[jh + 0] = t0p1 + t2p3, a[jh + 2] = (t0p1 - t2p3) * ww; a[jh + 1] = t0m1 + t2m3, a[jh + 3] = (t0m1 - t2m3) * ww; xx *= dy[__builtin_ctz(jh += 4)]; } } else if (v == 4) { const __m128i m0 = _mm_set1_epi32(0); const __m128i m1 = _mm_set1_epi32(mod); const __m128i m2 = _mm_set1_epi32(mod + mod); const __m128i r = _mm_set1_epi32(mint::r); const __m128i Imag = _mm_set1_epi32(imag.a); mint ww = one, xx = one, yy = one; u <<= 2; for (int jh = 0; jh < u;) { if (jh == 0) { int j0 = 0; int j1 = v; int j2 = v + v; int j3 = j2 + v; for (; j0 < v; j0 += 4, j1 += 4, j2 += 4, j3 += 4) { const __m128i T0 = _mm_loadu_si128((__m128i *)(a + j0)); const __m128i T1 = _mm_loadu_si128((__m128i *)(a + j1)); const __m128i T2 = _mm_loadu_si128((__m128i *)(a + j2)); const __m128i T3 = _mm_loadu_si128((__m128i *)(a + j3)); const __m128i T0P1 = montgomery_add_128(T0, T1, m2, m0); const __m128i T2P3 = montgomery_add_128(T2, T3, m2, m0); const __m128i T0M1 = montgomery_sub_128(T0, T1, m2, m0); const __m128i T2M3 = montgomery_mul_128( montgomery_sub_128(T2, T3, m2, m0), Imag, r, m1); _mm_storeu_si128((__m128i *)(a + j0), montgomery_add_128(T0P1, T2P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j2), montgomery_sub_128(T0P1, T2P3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j1), montgomery_add_128(T0M1, T2M3, m2, m0)); _mm_storeu_si128((__m128i *)(a + j3), montgomery_sub_128(T0M1, T2M3, m2, m0)); } } else { ww = xx * xx, yy = xx * imag; const __m128i WW = _mm_set1_epi32(ww.a); const __m128i XX = _mm_set1_epi32(xx.a); const __m128i YY = _mm_set1_epi32(yy.a); int j0 = jh * v; int j1 = j0 + v; int j2 = j1 + v; int j3 = j2 + v; int je = j1; for (; j0 < je; j0 += 4, j1 += 4, j2 += 4, j3 += 4) { const __m128i T0 = _mm_loadu_si128((__m128i *)(a + j0)); const __m128i T1 = _mm_loadu_si128((__m128i *)(a + j1)); const __m128i T2 = _mm_loadu_si128((__m128i *)(a + j2)); const __m128i T3 = _mm_loadu_si128((__m128i *)(a + j3)); const __m128i T0P1 = montgomery_add_128(T0, T1, m2, m0); const __m128i T2P3 = montgomery_add_128(T2, T3, m2, m0); const __m128i T0M1 = montgomery_mul_128( montgomery_sub_128(T0, T1, m2, m0), XX, r, m1); __m128i T2M3 = montgomery_mul_128( montgomery_sub_128(T2, T3, m2, m0), YY, r, m1); _mm_storeu_si128((__m128i *)(a + j0), montgomery_add_128(T0P1, T2P3, m2, m0)); _mm_storeu_si128( (__m128i *)(a + j2), montgomery_mul_128(montgomery_sub_128(T0P1, T2P3, m2, m0), WW, r, m1)); _mm_storeu_si128((__m128i *)(a + j1), montgomery_add_128(T0M1, T2M3, m2, m0)); _mm_storeu_si128( (__m128i *)(a + j3), montgomery_mul_128(montgomery_sub_128(T0M1, T2M3, m2, m0), WW, r, m1)); } } xx *= dy[__builtin_ctz(jh += 4)]; } } else { const __m256i m0 = _mm256_set1_epi32(0); const __m256i m1 = _mm256_set1_epi32(mod); const __m256i m2 = _mm256_set1_epi32(mod + mod); const __m256i r = _mm256_set1_epi32(mint::r); const __m256i Imag = _mm256_set1_epi32(imag.a); mint ww = one, xx = one, yy = one; u <<= 2; for (int jh = 0; jh < u;) { if (jh == 0) { int j0 = 0; int j1 = v; int j2 = v + v; int j3 = j2 + v; for (; j0 < v; j0 += 8, j1 += 8, j2 += 8, j3 += 8) { const __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); const __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); const __m256i T2 = _mm256_loadu_si256((__m256i *)(a + j2)); const __m256i T3 = _mm256_loadu_si256((__m256i *)(a + j3)); const __m256i T0P1 = montgomery_add_256(T0, T1, m2, m0); const __m256i T2P3 = montgomery_add_256(T2, T3, m2, m0); const __m256i T0M1 = montgomery_sub_256(T0, T1, m2, m0); const __m256i T2M3 = montgomery_mul_256( montgomery_sub_256(T2, T3, m2, m0), Imag, r, m1); _mm256_storeu_si256((__m256i *)(a + j0), montgomery_add_256(T0P1, T2P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j2), montgomery_sub_256(T0P1, T2P3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j1), montgomery_add_256(T0M1, T2M3, m2, m0)); _mm256_storeu_si256((__m256i *)(a + j3), montgomery_sub_256(T0M1, T2M3, m2, m0)); } } else { ww = xx * xx, yy = xx * imag; const __m256i WW = _mm256_set1_epi32(ww.a); const __m256i XX = _mm256_set1_epi32(xx.a); const __m256i YY = _mm256_set1_epi32(yy.a); int j0 = jh * v; int j1 = j0 + v; int j2 = j1 + v; int j3 = j2 + v; int je = j1; for (; j0 < je; j0 += 8, j1 += 8, j2 += 8, j3 += 8) { const __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); const __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); const __m256i T2 = _mm256_loadu_si256((__m256i *)(a + j2)); const __m256i T3 = _mm256_loadu_si256((__m256i *)(a + j3)); const __m256i T0P1 = montgomery_add_256(T0, T1, m2, m0); const __m256i T2P3 = montgomery_add_256(T2, T3, m2, m0); const __m256i T0M1 = montgomery_mul_256( montgomery_sub_256(T0, T1, m2, m0), XX, r, m1); const __m256i T2M3 = montgomery_mul_256( montgomery_sub_256(T2, T3, m2, m0), YY, r, m1); _mm256_storeu_si256((__m256i *)(a + j0), montgomery_add_256(T0P1, T2P3, m2, m0)); _mm256_storeu_si256( (__m256i *)(a + j2), montgomery_mul_256(montgomery_sub_256(T0P1, T2P3, m2, m0), WW, r, m1)); _mm256_storeu_si256((__m256i *)(a + j1), montgomery_add_256(T0M1, T2M3, m2, m0)); _mm256_storeu_si256( (__m256i *)(a + j3), montgomery_mul_256(montgomery_sub_256(T0M1, T2M3, m2, m0), WW, r, m1)); } } xx *= dy[__builtin_ctz(jh += 4)]; } } u >>= 4; v <<= 2; } if (k & 1) { v = 1 << (k - 1); if (v < 8) { for (int j = 0; j < v; ++j) { mint ajv = a[j] - a[j + v]; a[j] += a[j + v]; a[j + v] = ajv; } } else { const __m256i m0 = _mm256_set1_epi32(0); const __m256i m2 = _mm256_set1_epi32(mod + mod); int j0 = 0; int j1 = v; for (; j0 < v; j0 += 8, j1 += 8) { const __m256i T0 = _mm256_loadu_si256((__m256i *)(a + j0)); const __m256i T1 = _mm256_loadu_si256((__m256i *)(a + j1)); __m256i naj = montgomery_add_256(T0, T1, m2, m0); __m256i najv = montgomery_sub_256(T0, T1, m2, m0); _mm256_storeu_si256((__m256i *)(a + j0), naj); _mm256_storeu_si256((__m256i *)(a + j1), najv); } } } if (normalize) { mint invn = mint(n).inverse(); for (int i = 0; i < n; i++) a[i] *= invn; } } __attribute__((target("avx2"))) void inplace_multiply( int l1, int l2, int zero_padding = true) { int l = l1 + l2 - 1; int M = 4; while (M < l) M <<= 1; if (zero_padding) { for (int i = l1; i < M; i++) buf1_[i] = 0; for (int i = l2; i < M; i++) buf2_[i] = 0; } const __m256i m0 = _mm256_set1_epi32(0); const __m256i m1 = _mm256_set1_epi32(mod); const __m256i r = _mm256_set1_epi32(mint::r); const __m256i N2 = _mm256_set1_epi32(mint::n2); for (int i = 0; i < l1; i += 8) { __m256i a = _mm256_loadu_si256((__m256i *)(buf1_ + i)); __m256i b = montgomery_mul_256(a, N2, r, m1); _mm256_storeu_si256((__m256i *)(buf1_ + i), b); } for (int i = 0; i < l2; i += 8) { __m256i a = _mm256_loadu_si256((__m256i *)(buf2_ + i)); __m256i b = montgomery_mul_256(a, N2, r, m1); _mm256_storeu_si256((__m256i *)(buf2_ + i), b); } ntt(buf1, M); ntt(buf2, M); for (int i = 0; i < M; i += 8) { __m256i a = _mm256_loadu_si256((__m256i *)(buf1_ + i)); __m256i b = _mm256_loadu_si256((__m256i *)(buf2_ + i)); __m256i c = montgomery_mul_256(a, b, r, m1); _mm256_storeu_si256((__m256i *)(buf1_ + i), c); } intt(buf1, M, false); const __m256i INVM = _mm256_set1_epi32((mint(M).inverse()).a); for (int i = 0; i < l; i += 8) { __m256i a = _mm256_loadu_si256((__m256i *)(buf1_ + i)); __m256i b = montgomery_mul_256(a, INVM, r, m1); __m256i c = my256_mulhi_epu32(my256_mullo_epu32(b, r), m1); __m256i d = _mm256_and_si256(_mm256_cmpgt_epi32(c, m0), m1); __m256i e = _mm256_sub_epi32(d, c); _mm256_storeu_si256((__m256i *)(buf1_ + i), e); } } void ntt(vector &a) { int M = (int)a.size(); for (int i = 0; i < M; i++) buf1[i].a = a[i].a; ntt(buf1, M); for (int i = 0; i < M; i++) a[i].a = buf1[i].a; } void intt(vector &a) { int M = (int)a.size(); for (int i = 0; i < M; i++) buf1[i].a = a[i].a; intt(buf1, M, true); for (int i = 0; i < M; i++) a[i].a = buf1[i].a; } vector multiply(const vector &a, const vector &b) { if (a.size() == 0 && b.size() == 0) return vector{}; int l = a.size() + b.size() - 1; if (min(a.size(), b.size()) <= 40) { vector s(l); for (int i = 0; i < (int)a.size(); ++i) for (int j = 0; j < (int)b.size(); ++j) s[i + j] += a[i] * b[j]; return s; } assert(l <= SZ_FFT_BUF); int M = 4; while (M < l) M <<= 1; for (int i = 0; i < (int)a.size(); ++i) buf1[i].a = a[i].a; for (int i = (int)a.size(); i < M; ++i) buf1[i].a = 0; for (int i = 0; i < (int)b.size(); ++i) buf2[i].a = b[i].a; for (int i = (int)b.size(); i < M; ++i) buf2[i].a = 0; ntt(buf1, M); ntt(buf2, M); for (int i = 0; i < M; ++i) buf1[i].a = mint::reduce(uint64_t(buf1[i].a) * buf2[i].a); intt(buf1, M, false); vector s(l); mint invm = mint(M).inverse(); for (int i = 0; i < l; ++i) s[i] = buf1[i] * invm; return s; } void ntt_doubling(vector &a) { int M = (int)a.size(); for (int i = 0; i < M; i++) buf1[i].a = a[i].a; intt(buf1, M); mint r = 1, zeta = mint(pr).pow((mint::get_mod() - 1) / (M << 1)); for (int i = 0; i < M; i++) buf1[i] *= r, r *= zeta; ntt(buf1, M); a.resize(2 * M); for (int i = 0; i < M; i++) a[M + i].a = buf1[i].a; } }; namespace ArbitraryNTT { using i64 = int64_t; using u128 = __uint128_t; constexpr int32_t m0 = 167772161; constexpr int32_t m1 = 469762049; constexpr int32_t m2 = 754974721; using mint0 = LazyMontgomeryModInt; using mint1 = LazyMontgomeryModInt; using mint2 = LazyMontgomeryModInt; constexpr int r01 = mint1(m0).inverse().get(); constexpr int r02 = mint2(m0).inverse().get(); constexpr int r12 = mint2(m1).inverse().get(); constexpr int r02r12 = i64(r02) * r12 % m2; constexpr i64 w1 = m0; constexpr i64 w2 = i64(m0) * m1; template vector mul(const vector &a, const vector &b) { NTT ntt; vector s(a.size()), t(b.size()); for (int i = 0; i < (int)a.size(); ++i) s[i] = i64(a[i] % submint::get_mod()); for (int i = 0; i < (int)b.size(); ++i) t[i] = i64(b[i] % submint::get_mod()); return ntt.multiply(s, t); } template vector multiply(const vector &s, const vector &t, int mod) { auto d0 = mul(s, t); auto d1 = mul(s, t); auto d2 = mul(s, t); int n = d0.size(); vector ret(n); const int W1 = w1 % mod; const int W2 = w2 % mod; for (int i = 0; i < n; i++) { int n1 = d1[i].get(), n2 = d2[i].get(), a = d0[i].get(); int b = i64(n1 + m1 - a) * r01 % m1; int c = (i64(n2 + m2 - a) * r02r12 + i64(m2 - b) * r12) % m2; ret[i] = (i64(a) + i64(b) * W1 + i64(c) * W2) % mod; } return ret; } template vector multiply(const vector &a, const vector &b) { if (a.size() == 0 && b.size() == 0) return {}; if (min(a.size(), b.size()) < 128) { vector ret(a.size() + b.size() - 1); for (int i = 0; i < (int)a.size(); ++i) for (int j = 0; j < (int)b.size(); ++j) ret[i + j] += a[i] * b[j]; return ret; } vector s(a.size()), t(b.size()); for (int i = 0; i < (int)a.size(); ++i) s[i] = a[i].get(); for (int i = 0; i < (int)b.size(); ++i) t[i] = b[i].get(); vector u = multiply(s, t, mint::get_mod()); vector ret(u.size()); for (int i = 0; i < (int)u.size(); ++i) ret[i] = mint(u[i]); return ret; } template vector multiply_u128(const vector &s, const vector &t) { if (s.size() == 0 && t.size() == 0) return {}; if (min(s.size(), t.size()) < 128) { vector ret(s.size() + t.size() - 1); for (int i = 0; i < (int)s.size(); ++i) for (int j = 0; j < (int)t.size(); ++j) ret[i + j] += i64(s[i]) * t[j]; return ret; } auto d0 = mul(s, t); auto d1 = mul(s, t); auto d2 = mul(s, t); int n = d0.size(); vector ret(n); for (int i = 0; i < n; i++) { i64 n1 = d1[i].get(), n2 = d2[i].get(); i64 a = d0[i].get(); u128 b = (n1 + m1 - a) * r01 % m1; u128 c = ((n2 + m2 - a) * r02r12 + (m2 - b) * r12) % m2; ret[i] = a + b * w1 + c * w2; } return ret; } } // namespace ArbitraryNTTusing namespace std; template struct FormalPowerSeries : vector { using vector::vector; using FPS = FormalPowerSeries; 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]; return *this; } FPS &operator+=(const mint &r) { if (this->empty()) this->resize(1); (*this)[0] += r; 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]; return *this; } FPS &operator-=(const mint &r) { if (this->empty()) this->resize(1); (*this)[0] -= r; return *this; } FPS &operator*=(const mint &v) { for (int k = 0; k < (int)this->size(); k++) (*this)[k] *= v; return *this; } FPS &operator/=(const FPS &r) { if (this->size() < r.size()) { this->clear(); return *this; } int n = this->size() - r.size() + 1; if ((int)r.size() <= 64) { FPS f(*this), g(r); g.shrink(); mint coeff = g.back().inverse(); for (auto &x : g) x *= coeff; int deg = (int)f.size() - (int)g.size() + 1; int gs = g.size(); FPS quo(deg); for (int i = deg - 1; i >= 0; i--) { quo[i] = f[i + gs - 1]; for (int j = 0; j < gs; j++) f[i + j] -= quo[i] * g[j]; } *this = quo * coeff; this->resize(n, mint(0)); return *this; } return *this = ((*this).rev().pre(n) * r.rev().inv(n)).pre(n).rev(); } 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 mint &v) const { return FPS(*this) += v; } FPS operator-(const FPS &r) const { return FPS(*this) -= r; } FPS operator-(const mint &v) const { return FPS(*this) -= v; } FPS operator*(const FPS &r) const { return FPS(*this) *= r; } FPS operator*(const mint &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->size()); for (int i = 0; i < (int)this->size(); i++) ret[i] = -(*this)[i]; return ret; } void shrink() { while (this->size() && this->back() == mint(0)) this->pop_back(); } FPS rev() const { FPS ret(*this); reverse(begin(ret), end(ret)); return ret; } FPS dot(FPS r) const { FPS ret(min(this->size(), r.size())); for (int i = 0; i < (int)ret.size(); i++) ret[i] = (*this)[i] * r[i]; return ret; } FPS pre(int sz) const { return FPS(begin(*this), begin(*this) + min((int)this->size(), sz)); } FPS operator>>(int sz) const { if ((int)this->size() <= sz) return {}; FPS ret(*this); ret.erase(ret.begin(), ret.begin() + sz); return ret; } FPS operator<<(int sz) const { FPS ret(*this); ret.insert(ret.begin(), sz, mint(0)); return ret; } FPS diff() const { const int n = (int)this->size(); FPS ret(max(0, n - 1)); mint one(1), coeff(1); for (int i = 1; i < n; i++) { ret[i - 1] = (*this)[i] * coeff; coeff += one; } return ret; } FPS integral() const { const int n = (int)this->size(); FPS ret(n + 1); ret[0] = mint(0); if (n > 0) ret[1] = mint(1); auto mod = mint::get_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; } mint eval(mint x) const { mint r = 0, w = 1; for (auto &v : *this) r += w * v, w *= x; return r; } FPS log(int deg = -1) const { assert((*this)[0] == mint(1)); if (deg == -1) deg = (int)this->size(); return (this->diff() * this->inv(deg)).pre(deg - 1).integral(); } FPS pow(int64_t k, int deg = -1) const { const int n = (int)this->size(); if (deg == -1) deg = n; for (int i = 0; i < n; i++) { if ((*this)[i] != mint(0)) { if (i * k > deg) return FPS(deg, mint(0)); mint rev = mint(1) / (*this)[i]; FPS ret = (((*this * rev) >> i).log() * k).exp() * ((*this)[i].pow(k)); ret = (ret << (i * k)).pre(deg); if ((int)ret.size() < deg) ret.resize(deg, mint(0)); return ret; } } return FPS(deg, mint(0)); } static void *ntt_ptr; static void set_fft(); FPS &operator*=(const FPS &r); void ntt(); void intt(); void ntt_doubling(); static int ntt_pr(); FPS inv(int deg = -1) const; FPS exp(int deg = -1) const; }; template void *FormalPowerSeries::ntt_ptr = nullptr; /** * @brief 多項式/形式的冪級数ライブラリ * @docs docs/fps/formal-power-series.md */ template void FormalPowerSeries::set_fft() { ntt_ptr = nullptr; } template void FormalPowerSeries::ntt() { exit(1); } template void FormalPowerSeries::intt() { exit(1); } template void FormalPowerSeries::ntt_doubling() { exit(1); } template int FormalPowerSeries::ntt_pr() { exit(1); } template FormalPowerSeries& FormalPowerSeries::operator*=( const FormalPowerSeries& r) { if (this->empty() || r.empty()) { this->clear(); return *this; } auto ret = ArbitraryNTT::multiply(*this, r); return *this = FormalPowerSeries(ret.begin(), ret.end()); } template FormalPowerSeries FormalPowerSeries::inv(int deg) const { assert((*this)[0] != mint(0)); if (deg == -1) deg = (*this).size(); FormalPowerSeries ret({mint(1) / (*this)[0]}); for (int i = 1; i < deg; i <<= 1) ret = (ret + ret - ret * ret * (*this).pre(i << 1)).pre(i << 1); return ret.pre(deg); } template FormalPowerSeries FormalPowerSeries::exp(int deg) const { assert((*this).size() == 0 || (*this)[0] == mint(0)); if (deg == -1) deg = (int)this->size(); FormalPowerSeries ret({mint(1)}); for (int i = 1; i < deg; i <<= 1) { ret = (ret * (pre(i << 1) + mint(1) - ret.log(i << 1))).pre(i << 1); } return ret.pre(deg); } using fps=FormalPowerSeries; int memo[200][200][200]; void solve() { vl fib; fib.push_back(1); fib.push_back(2); while (fib.back() <= TEN(18)) { ll nx = fib[sz(fib) - 1] + fib[sz(fib) - 2]; fib.push_back(nx); } trc(fib); inl(N, L, R); { vl fib2; each(x, fib) if (L <= x and x <= R) fib2.push_back(x); swap(fib, fib2); } vs v; each(x, fib) v.push_back(to_string(x)); { vs v2; each(x, v) if (sz(x) <= N) v2.push_back(x); swap(v2, v); } while (true) { int upd = 0; rep(i, sz(v)) rep(j, sz(v)) { if (sz(v[i]) > sz(v[j]) or i == j) continue; // v[i] < v[j] int flg = 0; rep(u, sz(v[j]) - sz(v[i]) + 1) { int ok = 1; rep(s, sz(v[i])) { if (v[i][s] != v[j][s + u]) { ok = 0; break; } } if (ok) { flg = 1; break; } } if (flg) { v.erase(begin(v) + j); upd = 1; break; } } if (upd == 0) break; } rep(i, sz(v)) rep(j, sz(v)) { //memo[i][j][0] = 1; rep1(k, min(sz(v[i]), sz(v[j])) - 1) { string s = v[i].substr(sz(v[i]) - k, k); string t = v[j].substr(0, k); memo[i][j][k] = (s == t); } } // vでdp vvm dp(N + 1, vm(sz(v))); trc(v); rep(i, sz(v)) dp[sz(v[i])][i] = 1; rep1(i, N - 1) rep(j, sz(v)) { // i桁 末尾がv[j] rep(k, sz(v)) rep(l, min(sz(v[k]), sz(v[j]))) { if(i + sz(v[k]) - l > N) break; if (memo[j][k][l]) { dp[i + sz(v[k]) - l][k] += dp[i][j]; } } } //trc(dp); vm sm(N+1); rep1(i,N)rep(j,sz(v))sm[i]+=dp[i][j]; trc(sm); vm ep(N+1); ep[0]=1; rep(i,N){ ep[i+1]+=ep[i]*10; rep1(j,N){ if(i+j>N)break; ep[i+j]+=-ep[i]*sm[j]; } } trc(ep); out(ep[N]-1); }