//#pragma GCC target ("avx") #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #ifndef ONLINE_JUDGE #define _GLIBCXX_DEBUG #endif #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 atcoder; using namespace std; //#define int long long using ll = long long; using vll = vector; using vvll = vector; using vvvll = vector; using vi = vector; using vvi = vector; using vvvi = vector; using ld = long double; // long double で誤差を誤魔化せる場合もある using vld = vector; using vd = vector; using vvd = vector; using vc = vector; using vvc = vector; using vs = vector; using vb = vector; using vvb = vector; using pii = pair; using pcc = pair; using pll = pair; using pdd = pair; using pldld = pair; using vpii = vector; using vpll = vector; templatebool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } templatebool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } #define rep(i, n) for (ll i = 0; i < ll(n); i++) #define repback(i, n) for (ll i = n-1; i >= 0; i--) #define REP(i, a, b) for (ll i = a; i < ll(b); i++) #define REPBACK(i, a, b) for (ll i = a-1; i >= ll(b); i--) #define all(x) (x).begin(), (x).end() #define UNIQUE(A) A.erase(unique(all(A)), A.end()) // sortしてから使う #define include(y, x, H, W) (0 <= x && x < W && 0 <= y && y < H) #define square(x) (x) * (x) #define pb push_back #define eb emplace_back #define EPS (1e-10) #define equals(a,b) (fabs((a) - (b)) < EPS) #ifndef ONLINE_JUDGE #define debug1(x) cout << "debug:" << (x) << endl #define debug2(x, y) cout << "debug:" << (x) << " " << (y) << endl #define debug3(x, y, z) cout << "debug:" << (x) << " " << (y) << " " << (z) << endl #define debug4(x, y, z, w) cout << "debug:" << (x) << " " << (y) << " " << (z) << " " << (w) << endl #define debug5(x, y, z, w, v) cout << "debug:" << (x) << " " << (y) << " " << (z) << " " << (w) << " " << (v) << endl #define overload5(a, b, c, d, e, f, ...) f #define debug(...) overload5(__VA_ARGS__, debug5, debug4, debug3, debug2, debug1)(__VA_ARGS__) #define debug2C(x, y) cout << "debug:" << (x) << " : " << (y) << endl #define debug3P(x, y, z) cout << "debug:" << (x) << ", " << (y) << " : " << (z) << endl #define debug3C(x, y, z) cout << "debug:" << (x) << " : " << (y) << ", " << (z) << endl #define debuga cerr << "a" << endl #define TIMER_START TIME_START = std::chrono::system_clock::now() #define TIMER_END TIME_END = std::chrono::system_clock::now() #define TIMECHECK cerr << std::chrono::duration_cast< std::chrono::milliseconds >(TIME_END - TIME_START).count() << "ms" << endl #else #define debug(x) void(0) #define debug2(x, y) void(0) #define debug3(x, y, z) void(0) #define debug4(x, y, z, w) void(0) #define debug5(x, y, z, w, v) void(0) #define debug(...) void(0) #define debug2C(x, y) void(0) #define debug3P(x, y, z) void(0) #define debug3C(x, y, z) void(0) #define debuga void(0) #define TIMER_START void(0) #define TIMER_END void(0) #define TIMECHECK void(0) #endif #define YESNO(bool) if(bool){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';} #define yesno(bool) if(bool){cout<<"yes"<<'\n';}else{cout<<"no"<<'\n';} #define YesNo(bool) if(bool){cout<<"Yes"<<'\n';}else{cout<<"No"<<'\n';} #define POSIMPOS(bool) if(bool){cout<<"POSSIBLE"<<'\n';}else{cout<<"IMPOSSIBLE"<<'\n';} #define PosImpos(bool) if(bool){cout<<"Possible"<<'\n';}else{cout<<"Impossible"<<'\n';} #define posimpos(bool) if(bool){cout<<"possible"<<'\n';}else{cout<<"impossible"<<'\n';} #define popcount __builtin_popcountll // ll は 64bit対応! mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); std::chrono::system_clock::time_point TIME_START, TIME_END; static const double pi = acos(-1.0); const long long INFL = pow(10,18); const long long INFLMAX = 9223372036854775807; const int INF = pow(10,9); const int INFMAX = 2147483647; const int mod1 = 1000000007; const int mod2 = 998244353; const vi dx1 = {1,0,-1,0}; const vi dy1 = {0,1,0,-1}; const vi dx2 = {0, 1, 1, 1, 0, -1, -1, -1, 0}; const vi dy2 = {1, 1, 0, -1, -1, -1, 0, 1, 1}; // vector出力 template ostream& operator << (ostream& os, vector& vec) { os << "["; for (int i = 0; i ostream& operator << (ostream& os, pair& pair_var) { os << "(" << pair_var.first << ", " << pair_var.second << ")"; return os; } // map出力 template ostream& operator << (ostream& os, map& map_var) { os << "{"; for (auto itr = map_var.begin(); itr != map_var.end(); itr++) { os << "(" << itr->first << ", " << itr->second << ")"; itr++; if(itr != map_var.end()) os << ", "; itr--; } os << "}"; return os; } // set 出力 template ostream& operator << (ostream& os, set& set_var) { os << "{"; for (auto itr = set_var.begin(); itr != set_var.end(); itr++) { os << *itr; ++itr; if(itr != set_var.end()) os << ", "; itr--; } os << "}"; return os; } int GetTime(){ TIME_END = std::chrono::system_clock::now(); return std::chrono::duration_cast< std::chrono::milliseconds >(TIME_END - TIME_START).count(); } ll myRand(ll B) {return (unsigned long long)rng() % B;} struct Edge{ int to; ll cost; Edge(int to = 0, ll cost = 0):to(to), cost(cost){} }; using Graph = vector >; ll gcd(ll a, ll b){ if(a < b) swap(a, b); if(b == 0) return a; if(a%b == 0) return b; else return gcd(b, a%b); } // 有理数型(x/y) struct Fraction{ long long x,y; // 約分 void reduc(){ ll minus = 1; if(x < 0) minus *= -1; if(y < 0) minus *= -1; ll g = gcd(abs(x), abs(y)); x = minus * abs(x) / g; y = abs(y) / g; } Fraction(ll x = 0, ll y = 1): x(x), y(y) {reduc();}; bool operator<(const Fraction& right) const {return x*right.y < y*right.x;} bool operator<=(const Fraction& right) const {return x*right.y <= y*right.x;} bool operator>(const Fraction& right) const {return x*right.y > y*right.x;} bool operator>=(const Fraction& right) const {return x*right.y >= y*right.x;} bool operator==(const Fraction& right) const {return x == right.x && y == right.y;} Fraction operator-() const {return Fraction(-x, y);} Fraction& operator+=(const Fraction& v){ x = x*v.y + y*v.x; y *= v.y; reduc(); return *this; } Fraction operator+(const Fraction& v) const {return Fraction(*this) += v;} Fraction& operator-=(const Fraction& v){ x = x*v.y - y*v.x; y *= v.y; reduc(); return *this; } Fraction operator-(const Fraction& v) const {return Fraction(*this) -= v;} Fraction& operator*=(const Fraction& v){ x *= v.x; y *= v.y; reduc(); return *this; } Fraction operator*(const Fraction& v) const {return Fraction(*this) *= v;} Fraction& operator/=(const Fraction& v){ x *= v.y; y *= v.x; reduc(); return *this; } Fraction operator/(const Fraction& v) const {return Fraction(*this) /= v;} Fraction inv() const {return Fraction(y,x);} Fraction pow(ll t) const { if(t < 0) return inv().pow(-t); Fraction a(1, 1), d = *this; while(t){ d *= d; if(t & 1) a *= d; t >>= 1; } return a; } friend ostream& operator << (ostream& os, const Fraction& v){ return os << v.x << '/' << v.y;} }; class Point{ public: double x, y; Point(double x = 0, double y = 0): x(x), y(y) {} Point operator + (Point p) {return Point(x + p.x, y + p.y); } Point operator - (Point p) {return Point(x - p.x, y - p.y); } Point operator * (double a) {return Point(a * x, a * y); } Point operator / (double a) {return Point(x / a, y / a); } double norm() {return x * x + y * y; } double abs() {return sqrt(norm()); } bool operator == (const Point &p) const{ return fabs(x - p.x) < EPS && fabs(y - p.y) < EPS; } bool operator < (const Point &p) const{ return x != p.x ? x < p.x : y < p.y; } }; double dot(Point a, Point b){return a.x * b.x + a.y * b.y;} double cross(Point a, Point b){return a.x * b.y - a.y * b.x;} // x % P を非負整数に直す ll MOD(ll &x, const ll P){ ll ret = x%P; if(ret < 0) ret += P; return x = ret; } //x^n % mod を計算 ll mpow(ll x, ll n, ll mod){ x %= mod; ll ret = 1; while(n > 0){ if(n & 1) ret = ret * x % mod; x = x * x % mod; n >>= 1; } return ret; } // x^nを計算 ll lpow(ll x, ll n){ ll ret = 1; while(n > 0){ if(n & 1) ret = ret * x; x = x * x; n >>= 1; } return ret; } int ceil_pow2(int n) { int x = 0; while ((1U << x) < (unsigned int)(n)) x++; return x; } //10進数(long long) → 2進数(string)への変換 string toBinary(ll n) { if(n == 0) return "0"; assert(n > 0); string ret; while (n != 0){ ret += ( n & 1 == 1 ? '1' : '0' ); n >>= 1; } reverse(ret.begin(), ret.end()); return ret; } //2進数(string) → 10進数(long long)への変換 ll toDecimal(string S){ ll ret = 0; for(int i = 0; i < S.size(); i++){ ret *= 2LL; if(S[i] == '1') ret += 1; } return ret; } ll lcm(ll a, ll b){ assert(gcd(a,b) != 0); return a / gcd(a, b) * b; } //拡張ユークリッドの互除法 //ax + by = gcd(a, b) を満たす (x, y) が格納される (返り値: a と b の最大公約数) long long extGCD(long long a, long long b, long long &x, long long &y) { if (b == 0) { x = 1; y = 0; return a; } // a = a/b * b + a % b を上式に再帰的に適用 long long d = extGCD(b, a%b, y, x); y -= a/b * x; return d; } // 行列同士の積 template vector > matrix_prod(vector > &A, vector > &B){ // Aは i * k , Bは k * j の行列 -> 積で i * j の行列を返す assert(A[0].size() == B.size()); int r = A.size(); int c = B[0].size(); vector > ret(r, vector(c,0)); rep(i,r){ rep(j,c){ rep(k,B.size()){ ret[i][j] += A[i][k] * B[k][j]; } } } return ret; } // 行列を時計回りに90度回転 template vector > matrix_rotate(const vector > &mat){ int R = mat.size(); int C = mat[0].size(); vector > ret(C, vector(R)); if (R == 0 || C == 0) return ret; rep(i,R){ rep(j,C) ret[j][R-1-i] = mat[i][j]; } return ret; } template void rotate_inplace(vector> &mat){ int N = mat.size(); if (N == 0) return; //行列を転置 for (int i = 0; i < N; i++) { for (int j = 0; j < i; j++) { swap(mat[i][j], mat[j][i]); } } //列を交換 for (int i = 0; i < N; i++) { for (int j = 0; j < N/2; j++) { swap(mat[i][j], mat[i][N - j - 1]); } } } template< class T > struct CumulativeSum2D { vector< vector< T > > data; CumulativeSum2D(int W, int H) : data(W + 1, vector< T >(H + 1, 0)) {} void add(int x, int y, T z) { ++x, ++y; if(x >= data.size() || y >= data[0].size()) return; data[x][y] += z; } void build() { for(int i = 1; i < data.size(); i++) { for(int j = 1; j < data[i].size(); j++) { data[i][j] += data[i][j - 1] + data[i - 1][j] - data[i - 1][j - 1]; } } } T query(int sx, int sy, int gx, int gy) const { return (data[gx][gy] - data[sx][gy] - data[gx][sy] + data[sx][sy]); } }; // 二項係数 struct Combination{ int MAX; int MOD; vll fac,finv,inv; Combination(int MAX, int MOD) : MAX(MAX + 1), MOD(MOD){ fac.resize(MAX + 1); finv.resize(MAX + 1); inv.resize(MAX + 1); COMinit(); } // テーブルを作る前処理 void COMinit() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } // 二項係数計算 long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; } }; // segment tree (from ACL) // 型S, 二項演算 S op(S a, S b), 単位元 S e() を定義する必要有、モノイドが対象 template struct segtree { public: segtree() : segtree(0) {} explicit segtree(int n) : segtree(std::vector(n, e())) {} // 引数に int n で長さnの数列a(初期値e())を作る explicit segtree(const std::vector& v) : _n(int(v.size())) { // 引数に vector v で長さn = v.size() の数列a(初期値はvに従う)を作る log = ceil_pow2(_n); size = 1 << log; d = std::vector(2 * size, e()); for (int i = 0; i < _n; i++) d[size + i] = v[i]; for (int i = size - 1; i >= 1; i--) { update(i); } } // a[p]にxを代入(一点更新) void set(int p, S x) { assert(0 <= p && p < _n); p += size; d[p] = x; for (int i = 1; i <= log; i++) update(p >> i); } // a[p]を返す(一点取得) S get(int p) const { assert(0 <= p && p < _n); return d[p + size]; } // op(a[l], ……, a[r-1]) を計算する(区間に対する演算) S prod(int l, int r) const { assert(0 <= l && l <= r && r <= _n); S sml = e(), smr = e(); l += size; r += size; while (l < r) { if (l & 1) sml = op(sml, d[l++]); if (r & 1) smr = op(d[--r], smr); l >>= 1; r >>= 1; } return op(sml, smr); } // op(a[0], ……, a[n-1]) を計算する(全体に対する演算) S all_prod() const { return d[1]; } // segment tree 上での二分探索 template int max_right(int l) const { return max_right(l, [](S x) { return f(x); }); } template int max_right(int l, F f) const { assert(0 <= l && l <= _n); assert(f(e())); if (l == _n) return _n; l += size; S sm = e(); do { while (l % 2 == 0) l >>= 1; if (!f(op(sm, d[l]))) { while (l < size) { l = (2 * l); if (f(op(sm, d[l]))) { sm = op(sm, d[l]); l++; } } return l - size; } sm = op(sm, d[l]); l++; } while ((l & -l) != l); return _n; } template int min_left(int r) const { return min_left(r, [](S x) { return f(x); }); } template int min_left(int r, F f) const { assert(0 <= r && r <= _n); assert(f(e())); if (r == 0) return 0; r += size; S sm = e(); do { r--; while (r > 1 && (r % 2)) r >>= 1; if (!f(op(d[r], sm))) { while (r < size) { r = (2 * r + 1); if (f(op(d[r], sm))) { sm = op(d[r], sm); r--; } } return r + 1 - size; } sm = op(d[r], sm); } while ((r & -r) != r); return 0; } private: int _n, size, log; std::vector d; void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); } }; // Binary Indexed Tree template struct BIT { int n; // 配列の要素数(数列の要素数+1) vector bit; // データの格納先 BIT(int n_) : n(n_ + 1), bit(n, 0) {} // 1-indexed // A_i += x void add(int idx, T x) { while(idx < n){ // n <- n+1 に予めしてるため等号を含まないことに注意 bit[idx] += x; idx += (idx & -idx); } } // A_1 ~ A_i の和を計算 T sum(int idx) { T ret(0); while(idx > 0){ ret += bit[idx]; idx -= (idx & -idx); } return ret; } // A_1 + A_2 + ... + A_x >= w となるような最小の x を求める (A_i >= 0) int lower_bound(T w) { if (w <= 0) return 0; else { int x = 0, r = 1; while (r < n) r = r << 1; for (int len = r; len > 0; len = len >> 1) { if (x + len < n && bit[x + len] < w) { w -= bit[x + len]; x += len; } } return x + 1; } } }; //Union-Find struct unionfind{ vector par, siz; //初期化 unionfind(int n) : par(n, -1), siz(n, 1) {} //根を求める int root(int x) { if (par[x] == -1) return x; else return par[x] = root(par[x]); } //xとyの根(グループ)が一致するかどうか bool issame(int x, int y){ return root(x) == root(y); } //xとyのグループの併合 bool unite(int x, int y){ x = root(x); y = root(y); if (x == y) return false; if (siz[x] < siz[y]) swap(x,y); par[y] = x; siz[x] += siz[y]; return true; } //xを含むグループのサイズ int size(int x){ return siz[root(x)]; } }; // ############################ // # # // # C O D E S T A R T # // # # // ############################ void solve(){ ll N,K; cin >> N >> K; vector P(N+3); REP(i,2,N+3) { int val = i; REP(j,2,val+1) { if(j*j>val) break; if(val % j == 0) { int cnt = 0; while(val % j == 0) { cnt++; val /= j; } P[i].pb({j,cnt}); } } if(val != 1) P[i].pb({val,1}); } unordered_map now; for(auto [x,v]:P[N]) now[x] = v; rep(i,min(N+1,K)) { unordered_map nxt; for(auto [p,a]:now) { for(auto [pr,cnt]:P[p+1]) { nxt[pr] += cnt*a%mod1; nxt[pr] %= mod1; } } swap(now,nxt); for(auto [x,v]:now) debug(i,x,v); } K -= min(N+1,K); if(K%2 == 1) { swap(now[2], now[3]); } now[2] = now[2] * mpow(2,(K+1)/2,mod1) % mod1; ll ans = 1; for(auto [x,v] : now) { ans *= mpow(x,v,mod1); ans %= mod1; } cout << ans << '\n'; } signed main(){ cin.tie(0); ios_base::sync_with_stdio(false); TIMER_START; //cout << fixed << setprecision(15); int tt; tt = 1; //cin >> tt; while(tt--){ solve(); } TIMER_END; TIMECHECK; return 0; }