#522451 (C++17) No.1143 面積Nの三角形

提出ソース
結果

問題	No.1143 面積Nの三角形
ユーザー	NyaanNyaan
提出日時	2020-07-31 23:08:32
言語	C++17 (gcc 13.2.0 + boost 1.83.0)
結果	AC
実行時間	69 ms / 800 ms
コード長	13,404 bytes
コンパイル時間	3,706 ms
コンパイル使用メモリ	310,116 KB
実行使用メモリ	4,380 KB
最終ジャッジ日時	2023-09-21 02:15:19
合計ジャッジ時間	4,812 ms
ジャッジサーバーID （参考情報）	judge12 / judge11
このコードへのチャレンジ
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テストケース

テストケース表示
入力	結果	実行時間実行使用メモリ
testcase_00	AC	2 ms 4,380 KB
testcase_01	AC	2 ms 4,376 KB
testcase_02	AC	2 ms 4,380 KB
testcase_03	AC	2 ms 4,376 KB
testcase_04	AC	2 ms 4,380 KB
testcase_05	AC	2 ms 4,376 KB
testcase_06	AC	3 ms 4,376 KB
testcase_07	AC	6 ms 4,380 KB
testcase_08	AC	10 ms 4,376 KB
testcase_09	AC	13 ms 4,376 KB
testcase_10	AC	10 ms 4,376 KB
testcase_11	AC	28 ms 4,380 KB
testcase_12	AC	35 ms 4,380 KB
testcase_13	AC	36 ms 4,376 KB
testcase_14	AC	13 ms 4,376 KB
testcase_15	AC	2 ms 4,380 KB
testcase_16	AC	67 ms 4,376 KB
testcase_17	AC	69 ms 4,376 KB
testcase_18	AC	60 ms 4,376 KB
testcase_19	AC	55 ms 4,376 KB
権限があれば一括ダウンロードができます
ソースコード

raw source code
#pragma region kyopro_template
#define Nyaan_template
#include <immintrin.h>
#include <bits/stdc++.h>
#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 <class T>
using V = vector<T>;
using vi = vector<int>;
using vl = vector<long long>;
using vvi = vector<vector<int>>;
using vd = V<double>;
using vs = V<string>;
using vvl = vector<vector<long long>>;
using P = pair<long long, long long>;
using vp = vector<P>;
using pii = pair<int, int>;
using vpi = vector<pair<int, int>>;
constexpr int inf = 1001001001;
constexpr long long infLL = (1LL << 61) - 1;
template <typename T, typename U>
inline bool amin(T &x, U y) {
  return (y < x) ? (x = y, true) : false;
}
template <typename T, typename U>
inline bool amax(T &x, U y) {
  return (x < y) ? (x = y, true) : false;
}
template <typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
  os << p.first << " " << p.second;
  return os;
}
template <typename T, typename U>
istream &operator>>(istream &is, pair<T, U> &p) {
  is >> p.first >> p.second;
  return is;
}
template <typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
  int s = (int)v.size();
  for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i];
  return os;
}
template <typename T>
istream &operator>>(istream &is, vector<T> &v) {
  for (auto &x : v) is >> x;
  return is;
}
void in() {}
template <typename T, class... U>
void in(T &t, U &... u) {
  cin >> t;
  in(u...);
}
void out() { cout << "\n"; }
template <typename T, class... U>
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 <typename T>
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 <typename T, typename U>
void _cout(const pair<T, U> &p) {
  cerr << "{ ";
  _cout(p.fi);
  cerr << ", ";
  _cout(p.se);
  cerr << " } ";
}
template <typename T>
void _cout(const vector<T> &v) {
  int s = v.size();
  cerr << "{ ";
  for (int i = 0; i < s; i++) {
    cerr << (i ? ", " : "");
    _cout(v[i]);
  }
  cerr << " } ";
}
template <typename T>
void _cout(const vector<vector<T>> &v) {
  cerr << "[ ";
  for (const auto &x : v) {
    cerr << endl;
    _cout(x);
    cerr << ", ";
  }
  cerr << endl << " ] ";
}
void dbg_out() { cerr << endl; }
template <typename T, class... U>
void dbg_out(const T &t, const U &... u) {
  _cout(t);
  if (sizeof...(u)) cerr << ", ";
  dbg_out(u...);
}
template <typename T>
void array_out(const T &v, int s) {
  cerr << "{ ";
  for (int i = 0; i < s; i++) {
    cerr << (i ? ", " : "");
    _cout(v[i]);
  }
  cerr << " } " << endl;
}
template <typename T>
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 <typename T>
inline int getbit(T a, int i) {
  return (a >> i) & 1;
}
template <typename T>
inline void setbit(T &a, int i) {
  a |= (1LL << i);
}
template <typename T>
inline void delbit(T &a, int i) {
  a &= ~(1LL << i);
}
template <typename T>
int lb(const vector<T> &v, const T &a) {
  return lower_bound(begin(v), end(v), a) - begin(v);
}
template <typename T>
int ub(const vector<T> &v, const T &a) {
  return upper_bound(begin(v), end(v), a) - begin(v);
}
template <typename T>
int btw(T a, T x, T b) {
  return a <= x && x < b;
}
template <typename T, typename U>
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 <typename T>
vector<T> mkrui(const vector<T> &v) {
  vector<T> ret(v.size() + 1);
  for (int i = 0; i < int(v.size()); i++) ret[i + 1] = ret[i] + v[i];
  return ret;
};
template <typename T>
vector<T> mkuni(const vector<T> &v) {
  vector<T> ret(v);
  sort(ret.begin(), ret.end());
  ret.erase(unique(ret.begin(), ret.end()), ret.end());
  return ret;
}
template <typename F>
vector<int> mkord(int N, F f) {
  vector<int> ord(N);
  iota(begin(ord), end(ord), 0);
  sort(begin(ord), end(ord), f);
  return ord;
}
template <typename T = int>
vector<T> mkiota(int N) {
  vector<T> ret(N);
  iota(begin(ret), end(ret), 0);
  return ret;
}
template <typename T>
vector<int> mkinv(vector<T> &v) {
  vector<int> 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 endregionusing namespace std;

long long my_gcd(long long x, long long y) {
  long long z;
  if (x > y) swap(x, y);
  while (x) {
    x = y % (z = x);
    y = z;
  }
  return y;
}
long long my_lcm(long long x, long long y) {
  return 1LL * x / my_gcd(x, y) * y;
}
#define gcd my_gcd
#define lcm my_lcm

// Prime -> 1 {0, 0, 1, 1, 0, 1, 0, 1, ...}
vector<int> Primes(int N) {
  vector<int> A(N + 1, 1);
  A[0] = A[1] = 0;
  for (int i = 2; i * i <= N; i++)
    if (A[i] == 1)
      for (int j = i << 1; j <= N; j += i) A[j] = 0;
  return A;
}

// Prime Sieve {2, 3, 5, 7, 11, 13, 17, ...}
vector<long long> PrimeSieve(int N) {
  vector<int> prime = Primes(N);
  vector<long long> ret;
  for (int i = 0; i < (int)prime.size(); i++)
    if (prime[i] == 1) ret.push_back(i);
  return ret;
}

// Factors (using for fast factorization)
// {0, 0, 1, 1, 2, 1, 2, 1, 2, 3, ...}
vector<int> Factors(int N) {
  vector<int> A(N + 1, 1);
  A[0] = A[1] = 0;
  for (int i = 2; i * i <= N; i++)
    if (A[i] == 1)
      for (int j = i << 1; j <= N; j += i) A[j] = i;
  return A;
}

// totient function φ(N)=(1 ~ N , gcd(i,N) = 1)
// {0, 1, 1, 2, 4, 2, 6, 4, ... }
vector<int> EulersTotientFunction(int N) {
  vector<int> ret(N + 1, 0);
  for (int i = 0; i <= N; i++) ret[i] = i;
  for (int i = 2; i <= N; i++) {
    if (ret[i] == i)
      for (int j = i; j <= N; j += i) ret[j] = ret[j] / i * (i - 1);
  }
  return ret;
}

// Divisor ex) 12 -> {1, 2, 3, 4, 6, 12}
vector<long long> Divisor(long long N) {
  vector<long long> v;
  for (long long i = 1; i * i <= N; i++) {
    if (N % i == 0) {
      v.push_back(i);
      if (i * i != N) v.push_back(N / i);
    }
  }
  return v;
}

// Factorization
// ex) 18 -> { (2,1) , (3,2) }
vector<pair<long long, int> > PrimeFactors(long long N) {
  vector<pair<long long, int> > ret;
  for (long long p = 2; p * p <= N; p++)
    if (N % p == 0) {
      ret.emplace_back(p, 0);
      while (N % p == 0) N /= p, ret.back().second++;
    }
  if (N >= 2) ret.emplace_back(N, 1);
  return ret;
}

// Factorization with Prime Sieve
// ex) 18 -> { (2,1) , (3,2) }
vector<pair<long long, int> > PrimeFactors(long long N,
                                           const vector<long long> &prime) {
  vector<pair<long long, int> > ret;
  for (auto &p : prime) {
    if (p * p > N) break;
    if (N % p == 0) {
      ret.emplace_back(p, 0);
      while (N % p == 0) N /= p, ret.back().second++;
    }
  }
  if (N >= 2) ret.emplace_back(N, 1);
  return ret;
}

// modpow for mod < 2 ^ 31
long long modpow(long long a, long long n, long long mod) {
  a %= mod;
  long long ret = 1;
  while (n > 0) {
    if (n & 1) ret = ret * a % mod;
    a = a * a % mod;
    n >>= 1;
  }
  return ret % mod;
};

// Check if r is Primitive Root
bool isPrimitiveRoot(long long r, long long mod) {
  r %= mod;
  if (r == 0) return false;
  auto pf = PrimeFactors(mod - 1);
  for (auto &x : pf) {
    if (modpow(r, (mod - 1) / x.first, mod) == 1) return false;
  }
  return true;
}

// Get Primitive Root
long long PrimitiveRoot(long long mod) {
  long long ret = 1;
  while (isPrimitiveRoot(ret, mod) == false) ret++;
  return ret;
}

// Euler's phi function
long long phi(long long n) {
  auto pf = PrimeFactors(n);
  long long ret = n;
  for (auto p : pf) {
    ret /= p.first;
    ret *= (p.first - 1);
  }
  return ret;
}

// Extended Euclidean algorithm
// solve : ax + by = gcd(a, b)
// return : pair(x, y)
pair<long long, long long> extgcd(long long a, long long b) {
  if (b == 0) return make_pair(1, 0);
  long long x, y;
  tie(y, x) = extgcd(b, a % b);
  y -= a / b * x;
  return make_pair(x, y);
}

// Check if n is Square Number
bool isSquare(long long n) {
  if (n == 0 || n == 1) return true;
  long long d = (long long)sqrt(n) - 1;
  while (d * d < n) ++d;
  return d * d == n;
}

// return a number of n's digit
// zero ... return value if n = 0 (default -> 1)
int isDigit(long long n, int zero = 1) {
  if (n == 0) return zero;
  int ret = 0;
  while (n) {
    n /= 10;
    ret++;
  }
  return ret;
}void solve() {
  // s(s-a)(s-b)(s-c)=N^2
  inl(N);
  if(N < 10000){
    // 約数を考える
  ll ans = 0;
  auto ds = Divisor(N * N);
  sort(all(ds));
  // trc(ds);
  ll N2 = N * N;
  ll Nn = pow(N, 1.1);
  rep(_, sz(ds)) {
    ll s = ds[_];
    if(s * s < Nn) continue;
    ll nds = N2 / s;
    rep(_, sz(ds)) {
      ll a = ds[_];
      if (nds % a != 0) continue;
      ll ndsda = nds / a;
      if (s * a > N2) break;
      // b + c == s - a
      // b * c == ndsda
      if((s - a) * (s - a) - 2 * ndsda <= 0) continue;
      reg(__, _, sz(ds)) {
        ll b = ds[__];
        if(b << 1 > s - a) break;
        //trc(s, a, b);
        if (s * a * b > N2) break;
        if (ndsda % b != 0) continue;
        ll c = ndsda / b;
        if (b > c) continue;
        if (a + b + c == s) ans++;
      }
    }
  }
  out(ans);
  return;
  }
  // 約数を考える
  ll ans = 0;
  auto ds = Divisor(N * N);
  sort(all(ds));
  // trc(ds);
  ll N2 = N * N;
  ll Nn = pow(N, 1.11);
  rep(_, sz(ds)) {
    ll s = ds[_];
    if (s * s < Nn) continue;
    if (s > N / 2) break;
    ll nds = N2 / s;
    rep(_, sz(ds)) {
      ll a = ds[_];
      if (nds % a != 0) continue;
      ll ndsda = nds / a;
      if (s * a > N2) break;
      // b + c == s - a
      // b * c == ndsda
      // if((s - a) * (s - a) - 2 * ndsda <= 0) continue;
      // if(s > 2 * TEN(9)) break;
      ll cmb = (s - a) * (s - a) - 4 * ndsda;
      if (cmb < 0) continue;
      ll sq = ll(sqrt(cmb) + 0.5);
      if (sq * sq != cmb) continue;
      if (sq > s - a) continue;
      if ((sq & 1) == ((s - a) & 1)) {
        ll b = (s - a - sq) / 2;
        ll c = (sq + s - a) / 2;
        if (a <= b and b <= c) ans++;
      }
      /*
      reg(__, _, sz(ds)) {
        ll b = ds[__];
        //if (s <= b) break;
        if (b << 1 > s - a) break;
        // trc(s, a, b);
        if (s * a * b > N2) break;
        if (ndsda % b != 0) continue;
        ll c = ndsda / b;
        //if (s <= c) break;
        if (b > c) continue;
        if (a + b + c == s) ans++;
      }
      */
    }
  }
  out(ans);
}
yukicoder

結果

テストケース

ソースコード
