test/aoj/ALDS1_1_C/main.test.cpp

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• Last update: 2021-04-23 23:44:44+09:00
• Problem: http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ALDS1_1_C

Depends on

• Input tuple (Mylib/IO/input_tuple.cpp)
• Input tuples (Mylib/IO/input_tuples.cpp)
• Primality test (Trial division) (Mylib/Number/Prime/is_prime.cpp)

Code

#define PROBLEM "http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ALDS1_1_C"

#include <iostream>
#include "Mylib/IO/input_tuples.cpp"
#include "Mylib/Number/Prime/is_prime.cpp"

namespace hl = haar_lib;

int main() {
  int N;
  std::cin >> N;

  int ans = 0;

  for (auto [x] : hl::input_tuples<int>(N))
    if (hl::is_prime(x)) ++ans;

  std::cout << ans << std::endl;

  return 0;
}

#line 1 "test/aoj/ALDS1_1_C/main.test.cpp"
#define PROBLEM "http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ALDS1_1_C"

#include <iostream>
#line 2 "Mylib/IO/input_tuples.cpp"
#include <initializer_list>
#line 4 "Mylib/IO/input_tuples.cpp"
#include <tuple>
#include <utility>
#include <vector>
#line 6 "Mylib/IO/input_tuple.cpp"

namespace haar_lib {
  template <typename T, size_t... I>
  static void input_tuple_helper(std::istream &s, T &val, std::index_sequence<I...>) {
    (void) std::initializer_list<int>{(void(s >> std::get<I>(val)), 0)...};
  }

  template <typename T, typename U>
  std::istream &operator>>(std::istream &s, std::pair<T, U> &value) {
    s >> value.first >> value.second;
    return s;
  }

  template <typename... Args>
  std::istream &operator>>(std::istream &s, std::tuple<Args...> &value) {
    input_tuple_helper(s, value, std::make_index_sequence<sizeof...(Args)>());
    return s;
  }
}  // namespace haar_lib
#line 8 "Mylib/IO/input_tuples.cpp"

namespace haar_lib {
  template <typename... Args>
  class InputTuples {
    struct iter {
      using value_type = std::tuple<Args...>;
      value_type value;
      bool fetched = false;
      int N, c = 0;

      value_type operator*() {
        if (not fetched) {
          std::cin >> value;
        }
        return value;
      }

      void operator++() {
        ++c;
        fetched = false;
      }

      bool operator!=(iter &) const {
        return c < N;
      }

      iter(int N) : N(N) {}
    };

    int N;

  public:
    InputTuples(int N) : N(N) {}

    iter begin() const { return iter(N); }
    iter end() const { return iter(N); }
  };

  template <typename... Args>
  auto input_tuples(int N) {
    return InputTuples<Args...>(N);
  }
}  // namespace haar_lib
#line 2 "Mylib/Number/Prime/is_prime.cpp"

namespace haar_lib {
  constexpr bool is_prime(int n) {
    if (n <= 1) return false;
    for (int i = 2; i * i <= n; ++i) {
      if (n % i == 0) return false;
    }
    return true;
  }
}  // namespace haar_lib
#line 6 "test/aoj/ALDS1_1_C/main.test.cpp"

namespace hl = haar_lib;

int main() {
  int N;
  std::cin >> N;

  int ans = 0;

  for (auto [x] : hl::input_tuples<int>(N))
    if (hl::is_prime(x)) ++ans;

  std::cout << ans << std::endl;

  return 0;
}

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