結果

問題 No.1256 連続整数列
コンテスト
ユーザー KoD
提出日時 2020-10-16 21:25:38
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 3,827 bytes
コンパイル時間 3,677 ms
コンパイル使用メモリ 88,356 KB
実行使用メモリ 6,272 KB
最終ジャッジ日時 2025-06-20 10:39:23
合計ジャッジ時間 4,539 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
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ファイルパターン 結果
other AC * 40
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

diff # 

#line 1 "main.cpp"

/**
 * @title Template
 */

#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <vector>
#include <array>
#include <cassert>

#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/chmin_chmax.cpp"

template <class T, class U>
constexpr bool chmin(T &lhs, const U &rhs) {
  if (lhs > rhs) { lhs = rhs; return true; }
  return false;
}

template <class T, class U>
constexpr bool chmax(T &lhs, const U &rhs) {
  if (lhs < rhs) { lhs = rhs; return true; }
  return false;
}

/**
 * @title Chmin/Chmax
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/other/range.cpp"

#line 4 "/Users/kodamankod/Desktop/cpp_programming/Library/other/range.cpp"

class range {
public:
  class iterator {
  private:
    int64_t M_position;

  public:
    constexpr iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { ++M_position; }
    constexpr bool operator != (iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }
  };

  class reverse_iterator {
  private:
    int64_t M_position;
  
  public:
    constexpr reverse_iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { --M_position; }
    constexpr bool operator != (reverse_iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }
  };
  
private:
  const iterator M_first, M_last;

public:
  constexpr range(int64_t first, int64_t last) noexcept: M_first(first), M_last(std::max(first, last)) { }
  constexpr iterator begin() const noexcept { return M_first; }
  constexpr iterator end() const noexcept { return M_last; }
  constexpr reverse_iterator rbegin() const noexcept { return reverse_iterator(*M_last - 1); } 
  constexpr reverse_iterator rend() const noexcept { return reverse_iterator(*M_first - 1); } 
};

/**
 * @title Range
 */
#line 2 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/fact_prime.cpp"

#include <cstddef>
#line 7 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/fact_prime.cpp"
#include <iterator>
#line 9 "/Users/kodamankod/Desktop/cpp_programming/Library/algebraic/fact_prime.cpp"
#include <type_traits>

template <class T, std::enable_if_t<std::is_integral<T>::value>* = nullptr>
std::vector<std::pair<T, size_t>> factorize(T x) {
  assert(x > 0);
  if (x == 1) return { };
  std::vector<std::pair<T, size_t>> res;
  for (T i = 2; i * i <= x; ++i) {
    if (x % i == 0) {
      res.emplace_back(i, 0);
      while (x % i == 0) {
        res.back().second++;
        x /= i;
      }
    }
  }
  if (x > 1) {
    res.emplace_back(x, 1);
  }
  return res;
}

template <class T, std::enable_if_t<std::is_integral<T>::value>* = nullptr>
std::vector<T> divisors(const T x) {
  std::vector<T> small, big;
  for (T i = 1; i * i <= x; ++i) {
    if (x % i == 0) {
      small.push_back(i);
      if (i * i != x) {
        big.push_back(x / i);
      }
    }
  }
  small.reserve(small.size() + big.size());
  std::copy(big.rbegin(), big.rend(), std::back_inserter(small));
  return small;
}

/**
 * @title Factors/Divisors
 */
#line 17 "main.cpp"

using i32 = std::int32_t;
using i64 = std::int64_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;

constexpr i32 inf32 = (i32(1) << 30) - 1;
constexpr i64 inf64 = (i64(1) << 62) - 1;

int main() {
  i32 x;
  std::cin >> x;
  for (auto s: divisors(2 * x)) {
    if (s <= 2) {
      continue;
    }
    i32 t =  2 * x / s;
    i32 u = t - s + 1;
    if (u % 2 == 0) {
      std::cout << "YES\n";
      return 0;
    }
  }
  std::cout << "NO\n";
  return 0;
}
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