#include #include #include #include #include #include #include #include #include #include static const int MOD = 1000000007; using ll = long long; using namespace std; template constexpr T INF = ::numeric_limits::max()/32*15+208; vector get_prime(int n){ if(n <= 1) return vector(); vector is_prime(n+1, true); vector prime; is_prime[0] = is_prime[1] = 0; for (int i = 2; i <= n; ++i) { if(is_prime[i]) prime.emplace_back(i); for (auto &&j : prime){ if(i*j > n) break; is_prime[i*j] = false; if(i % j == 0) break; } } return prime; } constexpr int ntt_mod = 998244353, ntt_root = 3; // 1012924417 -> 5, 924844033 -> 5 // 998244353 -> 3, 897581057 -> 3 // 645922817 -> 3; template class NTT { vector> rts, rrts; public: NTT() = default; inline int add(int a,int b){ a += b; if(a >= M) a -= M; return a; } inline int mul(int a,int b){ return 1LL * a * b % M; } inline int pow(int a,int b){ int res = 1; while(b){ if(b&1) res = mul(res, a); a = mul(a, a); b >>= 1; } return res; } inline int extgcd(int a, int b, int &x ,int &y){ for (int u = y = 1, v = x = 0; a; ) { ll q = b/a; swap(x -= q*u, u); swap(y -= q*v, v); swap(b -= q*a, a); } return b; } inline int inv(int x){ int s, t; extgcd(x, M, s, t); return (M+s)%M; } void ensure_base(int N) { if(rts.size() >= N) return; rts.resize(N), rrts.resize(N); for(int i = 1; i < N; i <<= 1) { if(!rts[i].empty()) continue; int w = pow(proot, (M - 1) / (i << 1)); int rw = inv(w); rts[i].resize(i), rrts[i].resize(i); rts[i][0] = 1, rrts[i][0] = 1; for(int k = 1; k < i; k++) { rts[i][k] = mul(rts[i][k - 1],w); rrts[i][k] = mul(rrts[i][k - 1],rw); } } } void ntt(vector &a, int sign){ int n = a.size(); ensure_base(n); for (int i = 0, j = 1; j < n-1; ++j) { for (int k = n >> 1; k > (i ^= k); k >>= 1); if(j < i) swap(a[i], a[j]); } for (int i = 1; i < n; i <<= 1) { for (int j = 0; j < n; j += i * 2) { for (int k = 0; k < i; ++k) { int y = mul(a[j+k+i], (sign ? rrts[i][k] : rts[i][k])); a[j+k+i] = add(a[j+k], M-y), a[j+k] = add(a[j+k], y) ; } } } if(sign) { int temp = inv(n); for (int i = 0; i < n; ++i) a[i] = mul(a[i],temp); } } }; NTT ntt; constexpr int M = ntt_mod; struct poly { vector v; poly() = default; explicit poly(int n) : v(n) {}; explicit poly(vector vv) : v(std::move(vv)) {}; int size() const {return (int)v.size(); } poly cut(int len){ if(len < v.size()) v.resize(static_cast(len)); return *this; } inline int& operator[] (int i) {return v[i]; } poly operator+(const poly &a) const { return poly(*this) += a; } poly operator-(const poly &a) const { return poly(*this) -= a; } poly operator*(const poly &a) const { return poly(*this) *= a; } poly inv() const { int n = size(); vector rr(1, ntt.inv(this->v[0])); poly r(rr); for (int k = 2; k <= n; k <<= 1) { vector u(k); for (int i = 0; i < k; ++i) { u[i] = this->v[i]; } poly ff(u); poly nr = (r*r); nr = nr*ff; nr.cut(k); for (int i = 0; i < k/2; ++i) { nr[i] = (2*r[i]-nr[i]+M)%M; nr[i+k/2] = (M-nr[i+k/2])%M; } r = nr; } r.v.resize(n); return r; } poly& operator+=(const poly &a) { this->v.resize(max(size(), a.size())); for (int i = 0; i < a.size(); ++i) { (this->v[i] += a.v[i]); if(this->v[i] > ntt_mod) this->v[i] -= M; } return *this; } poly& operator-=(const poly &a) { this->v.resize(max(size(), a.size())); for (int i = 0; i < a.size(); ++i) { (this->v[i] += M-a.v[i]); if(this->v[i] > M) this->v[i] -= M; } return *this; } poly& operator*=(poly a) { int N = size()+a.size()-1; int sz = 1; while(sz < N) sz <<= 1; ntt.ensure_base(sz); this->v.resize(sz); a.v.resize(sz); ntt.ntt(this->v, 0); ntt.ntt(a.v, 0); for(int i = 0; i < sz; ++i) this->v[i] = ntt.mul(this->v[i], a.v[i]); ntt.ntt(this->v, 1); return *this; } poly& operator/=(const poly &a){ return (*this *= a.inv()); } }; int main() { int n; cin >> n; auto p = get_prime(3*n); poly A(n+1), B(2*n+1); for (auto &&i : p) { if(i > n) continue; A[i]++; B[2*i] += 3; } poly ret = (A*A-B)*A; ll ans = 0; for (auto &&i : p) { ans += ret[i]/6; } cout << ans << "\n"; return 0; }