#431472 (C++17) No.732 3PrimeCounting

• 問題: No.732 3PrimeCounting
• ユーザー: 👑 emthrm
• 提出日時: 2020-02-18 20:16:50
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: CE (最新)
  AC
  (最初)
• 実行時間: -
• コード長: 14,106 bytes
• コンパイル時間: 2,118 ms
• コンパイル使用メモリ: 205,068 KB
• 最終ジャッジ日時: 2024-11-14 22:07:29
• 合計ジャッジ時間: 2,722 ms
• ジャッジサーバーID （参考情報）: judge4 / judge1

コンパイルメッセージ

main.cpp:42:57: error: redefinition of 'template<class T> std::function<std::vector<_Tp>(const std::vector<_Tp>&, const std::vector<_Tp>&)> mul'
   42 | function<vector<T>(const vector<T>&, const vector<T>&)> mul = [](const vector<T> &a, const vector<T> &b) {
      |                                                         ^~~
main.cpp:28:57: note: 'template<class T> std::function<std::vector<_Tp>(const std::vector<_Tp>&, const std::vector<_Tp>&)> mul<T>' previously declared here
   28 | function<vector<T>(const vector<T>&, const vector<T>&)> mul = [](const vector<T> &a, const vector<T> &b) {
      |                                                         ^~~
main.cpp:50:30: error: redefinition of 'template<class T> std::function<bool(const T&, T&)> sqr'
   50 | function<bool(const T&, T&)> sqr = [](const T &a, T &res) {
      |                              ^~~
main.cpp:36:30: note: 'template<class T> std::function<bool(const T&, T&)> sqr<T>' previously declared here
   36 | function<bool(const T&, T&)> sqr = [](const T &a, T &res) {
      |                              ^~~

ソースコード

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
template <typename T> using posteriority_queue = priority_queue<T, vector<T>, greater<T> >;
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3fLL;
const double EPS = 1e-8;
const int MOD = 1000000007;
// const int MOD = 998244353;
const int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
const int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
template <typename T> void unique(vector<T> &a) { a.erase(unique(ALL(a)), a.end()); }
struct IOSetup {
  IOSetup() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);
  }
} iosetup;

template <typename T>
function<vector<T>(const vector<T>&, const vector<T>&)> mul = [](const vector<T> &a, const vector<T> &b) {
  int n = a.size(), m = b.size();
  vector<T> res(n + m - 1, T(0));
  REP(i, n) REP(j, m) res[i + j] += a[i] * b[j];
  return res;
};

template <typename T>
function<bool(const T&, T&)> sqr = [](const T &a, T &res) {
  res = T(sqrt(a));
  return true;
};

template <typename T>
function<vector<T>(const vector<T>&, const vector<T>&)> mul = [](const vector<T> &a, const vector<T> &b) {
  int n = a.size(), m = b.size();
  vector<T> res(n + m - 1, T(0));
  REP(i, n) REP(j, m) res[i + j] += a[i] * b[j];
  return res;
};

template <typename T>
function<bool(const T&, T&)> sqr = [](const T &a, T &res) {
  return false;
};

template <typename T>
struct FPS {
  vector<T> co;

  FPS(int deg = 0) : co(deg + 1, T(0)) {}
  FPS(const vector<T> &co) : co(co) {}
  FPS(initializer_list<T> init) : co(init.begin(), init.end()) {}
  template <typename InputIter> FPS(InputIter first, InputIter last) : co(first, last) {}

  inline const T &operator[](int term) const { return co[term]; }
  inline T &operator[](int term) { return co[term]; }

  void resize(int deg) {
    int prev = co.size();
    co.resize(deg + 1);
    if (prev < deg + 1) fill(co.begin() + prev, co.end(), T(0));
  }

  void shrink() { while (co.size() > 1 && co.back() == T(0)) co.pop_back(); }

  int degree() const { return static_cast<int>(co.size()) - 1; }

  FPS &operator=(const vector<T> &new_co) {
    co.resize(new_co.size());
    copy(ALL(new_co), co.begin());
    return *this;
  }

  FPS &operator=(const FPS &x) {
    co.resize(x.co.size());
    copy(ALL(x.co), co.begin());
    return *this;
  }

  FPS &operator+=(const FPS &x) {
    int n = x.co.size();
    if (n > co.size()) resize(n - 1);
    REP(i, n) co[i] += x.co[i];
    return *this;
  }

  FPS &operator-=(const FPS &x) {
    int n = x.co.size();
    if (n > co.size()) resize(n - 1);
    REP(i, n) co[i] -= x.co[i];
    return *this;
  }

  FPS &operator*=(T x) {
    for (T &e : co) e *= x;
    return *this;
  }

  FPS &operator*=(const FPS &x) { return *this = mul<T>(co, x.co); }

  FPS &operator/=(T x) {
    assert(x != T(0));
    T inv_x = T(1) / x;
    for (T &e : co) e *= inv_x;
    return *this;
  }

  FPS &operator/=(const FPS &x) {
    if (x.co.size() > co.size()) return *this = FPS();
    int n = co.size() - x.co.size() + 1;
    FPS a(co.rbegin(), co.rbegin() + n), b(x.co.rbegin(), x.co.rbegin() + min(static_cast<int>(x.co.size()), n));
    b = b.inv(n - 1);
    a *= b;
    return *this = FPS(a.co.rend() - n, a.co.rend());
  }

  FPS &operator%=(const FPS &x) {
    *this -= *this / x * x;
    co.resize(static_cast<int>(x.co.size()) - 1);
    if (co.empty()) co = {T(0)};
    return *this;
  }

  FPS &operator<<=(int n) {
    co.insert(co.begin(), n, T(0));
    return *this;
  }

  FPS &operator>>=(int n) {
    if (co.size() < n) return *this = FPS();
    co.erase(co.begin(), co.begin() + n);
    return *this;
  }

  bool operator==(const FPS &x) const {
    FPS a(*this), b(x);
    a.shrink(); b.shrink();
    int n = a.co.size();
    if (n != b.co.size()) return false;
    REP(i, n) if (a.co[i] != b.co[i]) return false;
    return true;
  }

  bool operator!=(const FPS &x) const { return !(*this == x); }

  FPS operator+() const { return *this; }

  FPS operator-() const {
    FPS res(*this);
    for (T &e : res.co) e = T(-e);
    return res;
  }

  FPS operator+(const FPS &x) const { return FPS(*this) += x; }

  FPS operator-(const FPS &x) const { return FPS(*this) -= x; }

  FPS operator*(T x) const { return FPS(*this) *= x; }

  FPS operator*(const FPS &x) const { return FPS(*this) *= x; }

  FPS operator/(T x) const { return FPS(*this) /= x; }

  FPS operator/(const FPS &x) const { return FPS(*this) /= x; }

  FPS operator%(const FPS &x) const { return FPS(*this) %= x; }

  FPS operator<<(int n) const { return FPS(*this) <<= n; }

  FPS operator>>(int n) const { return FPS(*this) >>= n; }

  T horner(T val) const {
    T res = T(0);
    for (int i = static_cast<int>(co.size()) - 1; i >= 0; --i) (res *= val) += co[i];
    return res;
  }

  FPS differential() const {
    int n = co.size();
    assert(n >= 1);
    FPS res(n - 1);
    FOR(i, 1, n) res.co[i - 1] = co[i] * T(i);
    return res;
  }

  FPS integral() const {
    int n = co.size();
    FPS res(n + 1);
    REP(i, n) res[i + 1] = co[i] / T(i + 1);
    return res;
  }

  FPS exp(int deg = -1) const {
    assert(co[0] == T(0));
    if (deg == -1) deg = static_cast<int>(co.size()) - 1;
    FPS one({T(1)}), res = one;
    for (int i = 1; i <= deg; i <<= 1) {
      res *= FPS(co.begin(), co.begin() + min(static_cast<int>(co.size()), i << 1)) - res.log((i << 1) - 1) + one;
      res.co.resize(i << 1);
    }
    res.co.resize(deg + 1);
    return res;
  }

  FPS inv(int deg = -1) const {
    assert(co[0] != T(0));
    if (deg == -1) deg = static_cast<int>(co.size()) - 1;
    FPS res({T(1) / co[0]});
    for (int i = 1; i <= deg; i <<= 1) {
      res = res + res - res * res * FPS(co.begin(), co.begin() + min(static_cast<int>(co.size()), i << 1));
      res.co.resize(i << 1);
    }
    res.co.resize(deg + 1);
    return res;
  }

  FPS log(int deg = -1) const {
    assert(co[0] == T(1));
    if (deg == -1) deg = static_cast<int>(co.size()) - 1;
    FPS integrand = differential() * inv(deg - 1);
    integrand.co.resize(deg);
    return integrand.integral();
  }

  FPS pow(ll exponent, int deg = -1) const {
    int n = co.size();
    if (deg == -1) deg = n - 1;
    REP(i, n) {
      if (co[i] != T(0)) {
        ll shift = exponent * i;
        if (shift > deg) break;
        T tmp = 1, base = co[i];
        ll e = exponent;
        while (e > 0) {
          if (e & 1) tmp *= base;
          base *= base;
          e >>= 1;
        }
        return ((((*this >> i) * (T(1) / co[i])).log(deg - shift) * T(exponent)).exp(deg - shift) * tmp) << shift;
      }
    }
    return FPS(deg);
  }

  FPS mod_pow(ll exponent, const FPS &md) const {
    FPS inv_rev_md = FPS(md.co.rbegin(), md.co.rend()).inv();
    int deg_of_md = md.co.size();
    function<void(FPS&, const FPS&)> mod_mul = [&](FPS &multiplicand, const FPS &multiplier) {
      multiplicand *= multiplier;
      if (deg_of_md <= multiplicand.co.size()) {
        int n = multiplicand.co.size() - deg_of_md + 1;
        FPS quotient = FPS(multiplicand.co.rbegin(), multiplicand.co.rbegin() + n) * FPS(inv_rev_md.co.begin(), inv_rev_md.co.begin() + min(static_cast<int>(inv_rev_md.co.size()), n));
        multiplicand -= FPS(quotient.co.rend() - n, quotient.co.rend()) * md;
      }
      multiplicand.co.resize(deg_of_md - 1);
      if (multiplicand.co.empty()) multiplicand.co = {T(0)};
    };
    FPS res({T(1)}), base = *this;
    mod_mul(base, res);
    while (exponent > 0) {
      if (exponent & 1) mod_mul(res, base);
      mod_mul(base, base);
      exponent >>= 1;
    }
    return res;
  }

  FPS sqrt(int deg = -1) const {
    int n = co.size();
    if (deg == -1) deg = n - 1;
    if (co[0] == T(0)) {
      FOR(i, 1, n) {
        if (co[i] == T(0)) continue;
        if (i & 1) return FPS(-1);
        int shift = i >> 1;
        if (deg < shift) break;
        FPS res = (*this >> i).sqrt(deg - shift);
        if (res.co.empty()) return FPS(-1);
        res <<= shift;
        res.resize(deg);
        return res;
      }
      return FPS(deg);
    }
    T s;
    if (!sqr<T>(co[0], s)) return FPS(-1);
    FPS res({s});
    T half = T(1) / T(2);
    for (int i = 1; i <= deg; i <<= 1) {
      (res += FPS(co.begin(), co.begin() + min(static_cast<int>(co.size()), i << 1)) * res.inv((i << 1) - 1)) *= half;
    }
    res.resize(deg);
    return res;
  }

  FPS translate(T c) const {
    int n = co.size();
    vector<T> fact(n, T(1)), inv_fact(n, T(1));
    FOR(i, 1, n) fact[i] = fact[i - 1] * T(i);
    inv_fact[n - 1] = T(1) / fact[n - 1];
    for (int i = n - 1; i > 0; --i) inv_fact[i - 1] = inv_fact[i] * T(i);
    vector<T> g(n), ex(n);
    REP(i, n) g[n - 1 - i] = co[i] * fact[i];
    T pow_c = T(1);
    REP(i, n) {
      ex[i] = pow_c * inv_fact[i];
      pow_c *= c;
    }
    vector<T> conv = mul<T>(g, ex);
    FPS res(n - 1);
    REP(i, n) res[i] = conv[n - 1 - i] * inv_fact[i];
    return res;
  }
};

namespace FFT {
  using Real = long double;
  struct Complex {
    Real re, im;
    Complex(Real re = 0, Real im = 0) : re(re), im(im) {}
    inline Complex operator+(const Complex &x) const { return Complex(re + x.re, im + x.im); }
    inline Complex operator-(const Complex &x) const { return Complex(re - x.re, im - x.im); }
    inline Complex operator*(const Complex &x) const { return Complex(re * x.re - im * x.im, re * x.im + im * x.re); }
    inline Complex mul_real(Real r) const { return Complex(re * r, im * r); }
    inline Complex mul_pin(Real r) const { return Complex(-im * r, re * r); }
    inline Complex conj() const { return Complex(re, -im); }
  };

  vector<int> butterfly{0};
  vector<vector<Complex> > zeta{{{1, 0}}};

  void calc(int n) {
    int prev_n = butterfly.size();
    if (n <= prev_n) return;
    butterfly.resize(n);
    int prev_lg = zeta.size(), lg = __builtin_ctz(n);
    FOR(i, 1, prev_n) butterfly[i] <<= lg - prev_lg;
    FOR(i, prev_n, n) butterfly[i] = (butterfly[i >> 1] >> 1) | ((i & 1) << (lg - 1));
    zeta.resize(lg);
    FOR(i, prev_lg, lg) {
      zeta[i].resize(1 << i);
      Real angle = -M_PI * 2 / (1 << (i + 1));
      REP(j, 1 << (i - 1)) {
        zeta[i][j << 1] = zeta[i - 1][j];
        Real theta = angle * ((j << 1) + 1);
        zeta[i][(j << 1) + 1] = {cos(theta), sin(theta)};
      }
    }
  }

  void sub_dft(vector<Complex> &a) {
    int n = a.size();
    // assert(__builtin_popcount(n) == 1);
    calc(n);
    int shift = __builtin_ctz(butterfly.size()) - __builtin_ctz(n);
    REP(i, n) {
      int j = butterfly[i] >> shift;
      if (i < j) swap(a[i], a[j]);
    }
    for (int block = 1; block < n; block <<= 1) {
      int den = __builtin_ctz(block);
      for (int i = 0; i < n; i += (block << 1)) REP(j, block) {
        Complex tmp = a[i + j + block] * zeta[den][j];
        a[i + j + block] = a[i + j] - tmp;
        a[i + j] = a[i + j] + tmp;
      }
    }
  }

  template <typename T>
  vector<Complex> dft(const vector<T> &a) {
    int sz = a.size(), lg = 1;
    while ((1 << lg) < sz) ++lg;
    vector<Complex> c(1 << lg);
    REP(i, sz) c[i].re = a[i];
    sub_dft(c);
    return c;
  }

  vector<Real> real_idft(vector<Complex> &a) {
    int n = a.size(), half = n >> 1, quarter = half >> 1;
    // assert(__builtin_popcount(n) == 1);
    calc(n);
    a[0] = (a[0] + a[half] + (a[0] - a[half]).mul_pin(1)).mul_real(0.5);
    int den = __builtin_ctz(half);
    FOR(i, 1, quarter) {
      int j = half - i;
      Complex tmp1 = a[i] + a[j].conj(), tmp2 = ((a[i] - a[j].conj()) * zeta[den][j]).mul_pin(1);
      a[i] = (tmp1 - tmp2).mul_real(0.5);
      a[j] = (tmp1 + tmp2).mul_real(0.5).conj();
    }
    if (quarter > 0) a[quarter] = a[quarter].conj();
    a.resize(half);
    sub_dft(a);
    reverse(a.begin() + 1, a.end());
    Real r = 1.0 / half;
    vector<Real> res(n);
    REP(i, n) res[i] = (i & 1 ? a[i >> 1].im : a[i >> 1].re) * r;
    return res;
  }

  void idft(vector<Complex> &a) {
    int n = a.size();
    sub_dft(a);
    reverse(a.begin() + 1, a.end());
    Real r = 1.0 / n;
    REP(i, n) a[i] = a[i].mul_real(r);
  }

  template <typename T>
  vector<Real> convolution(const vector<T> &a, const vector<T> &b) {
    int a_sz = a.size(), b_sz = b.size(), sz = a_sz + b_sz - 1, lg = 1;
    while ((1 << lg) < sz) ++lg;
    int n = 1 << lg;
    vector<Complex> c(n);
    REP(i, a_sz) c[i].re = a[i];
    REP(i, b_sz) c[i].im = b[i];
    sub_dft(c);
    int half = n >> 1;
    c[0] = Complex(c[0].re * c[0].im, 0);
    FOR(i, 1, half) {
      Complex i_square = c[i] * c[i], j_square = c[n - i] * c[n - i];
      c[i] = (j_square.conj() - i_square).mul_pin(0.25);
      c[n - i] = (i_square.conj() - j_square).mul_pin(0.25);
    }
    c[half] = Complex(c[half].re * c[half].im, 0);
    vector<Real> res = real_idft(c);
    res.resize(sz);
    return res;
  }
};

vector<bool> sieve_of_eratosthenes(int val) {
  vector<bool> res(val + 1, true);
  res[0] = false;
  if (val >= 1) res[1] = false;
  for (int i = 2; i * i <= val; ++i) if (res[i]) {
    for (int j = i * i; j <= val; j += i) res[j] = false;
  }
  return res;
}

int main() {
  mul<ll> = [&](const vector<ll> &a, const vector<ll> &b) {
    vector<FFT::Real> conv = FFT::convolution(a, b);
    int n = conv.size();
    vector<ll> res(n, 0);
    REP(i, n) res[i] = static_cast<ll>(roundl(conv[i]));
    return res;
  };
  int n; cin >> n;
  vector<bool> primes = sieve_of_eratosthenes(3 * n);
  FPS<ll> fps(3 * n), fps2(3 * n);
  REP(i, n + 1) {
    if (primes[i]) {
      fps[i] = 1;
      fps2[i + i] = 1;
    }
  }
  fps2 *= fps;
  fps = fps * fps * fps;
  ll ans = 0, sub = 0;
  REP(i, 3 * n + 1) {
    if (primes[i]) {
      ans += fps[i];
      sub += fps2[i];
    }
  }
  cout << (ans - sub * 3) / 6 << '\n';
  return 0;
}