結果

問題 No.2089 置換の符号
ユーザー shino16shino16
提出日時 2022-09-30 21:28:25
言語 C++17
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 163 ms / 2,000 ms
コード長 6,665 bytes
コンパイル時間 2,444 ms
コンパイル使用メモリ 219,196 KB
実行使用メモリ 5,736 KB
最終ジャッジ日時 2023-08-24 14:43:21
合計ジャッジ時間 4,449 ms
ジャッジサーバーID
（参考情報） 		judge12 / judge13
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
5,496 KB
testcase_01 AC 2 ms
5,708 KB
testcase_02 AC 2 ms
5,452 KB
testcase_03 AC 2 ms
5,700 KB
testcase_04 AC 2 ms
5,448 KB
testcase_05 AC 2 ms
5,516 KB
testcase_06 AC 2 ms
5,520 KB
testcase_07 AC 2 ms
5,440 KB
testcase_08 AC 2 ms
5,516 KB
testcase_09 AC 2 ms
5,652 KB
testcase_10 AC 2 ms
5,512 KB
testcase_11 AC 2 ms
5,564 KB
testcase_12 AC 2 ms
5,464 KB
testcase_13 AC 2 ms
5,444 KB
testcase_14 AC 2 ms
5,496 KB
testcase_15 AC 2 ms
5,564 KB
testcase_16 AC 2 ms
5,440 KB
testcase_17 AC 2 ms
5,580 KB
testcase_18 AC 2 ms
5,524 KB
testcase_19 AC 2 ms
5,584 KB
testcase_20 AC 2 ms
5,708 KB
testcase_21 AC 2 ms
5,452 KB
testcase_22 AC 2 ms
5,640 KB
testcase_23 AC 2 ms
5,708 KB
testcase_24 AC 2 ms
5,588 KB
testcase_25 AC 2 ms
5,508 KB
testcase_26 AC 3 ms
5,624 KB
testcase_27 AC 10 ms
5,464 KB
testcase_28 AC 101 ms
5,492 KB
testcase_29 AC 156 ms
5,672 KB
testcase_30 AC 163 ms
5,476 KB
testcase_31 AC 157 ms
5,476 KB
testcase_32 AC 161 ms
5,736 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

diff # 

#line 2 "lib/prelude.hpp"
#ifndef LOCAL
#pragma GCC optimize("O3")
/* #pragma GCC target("avx2") */
#endif
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep2(i, m, n) for (auto i = (m); i < (n); i++)
#define rep(i, n) rep2(i, 0, n)
#define repr2(i, m, n) for (auto i = (n); i-- > (m);)
#define repr(i, n) repr2(i, 0, n)
#define all(x) begin(x), end(x)
template <class T>
auto ndvec(size_t n, T&& x) { return vector(n, forward<T>(x)); }
template <class... Ts>
auto ndvec(size_t n, Ts&&... xs) { return vector(n, ndvec(forward<Ts>(xs)...)); }
#line 3 "lib/io.hpp"

struct int1 {
  int val;
  int1(int a = 1) : val(a - 1) {}
  operator int() const { return val; }
};

template <size_t BufSize = 1 << 26>
class stdin_reader {
 public:
  stdin_reader() { buf[fread(buf, 1, sizeof(buf), stdin)] = 0; }
  template <class T>
  enable_if_t<is_integral_v<T>> read(T& x) {
    skip();
    [[maybe_unused]] bool neg = false;
    if constexpr (is_signed_v<T>) neg = *p == '-' ? (p++, true) : false;
    x = 0;
    while (*p > ' ') x = x * 10 + (*p++ & 0x0F);
    if constexpr (is_signed_v<T>) x = neg ? -x : x;
  }
  template <class T>
  void_t<decltype(&T::val)> read(T& x) {
    x = T((unsigned)(*this));
  }
  void read(char*& q) {
    skip();
    q = p;
    while (*p > ' ') p++;
    *p = 0;
  }
  template <size_t N>
  void read(char (&s)[N]) {
    read(s);
  }
  void read(string& s) {
    skip();
    char* p0 = p;
    while (*p > ' ') p++;
    s.assign(p0, p);
  }
  template <class T, void_t<decltype(tuple_size<T>::value)>* = nullptr>
  void read(T& x) {
    read_tuple_impl(x, make_index_sequence<tuple_size_v<T>>{});
  }
  template <class T, class U>
  void read(pair<T, U>& x) {
    read(x.first), read(x.second);
  }
  template <class T, size_t N>
  void read(T (&a)[N]) {
    for (auto& e : a) read(e);
  }
  template <class T>
  operator T() {
    T x;
    return read(x), x;
  }
  template <class... Ts>
  void operator()(Ts&... xs) {
    (read(xs), ...);
  }
  int operator--() { return (int)*this - 1; }
  template <class T>
  T* arr(int n) {
    T* p = new T[n + 1];
    rep(i, n) read(p[i]);
    return p;
  }
  template <class T>
  void vec(vector<T>& v, int n) {
    v.resize(n);
    for (auto& e : v) read(e);
  }
  template <class T>
  vector<T> vec(int n) {
    vector<T> v;
    return vec(v, n), v;
  }
  template <class... Ts>
  tuple<vector<Ts>...> vecs(int n) {
    tuple<vector<Ts>...> res;
    vecs_impl(res, n, make_index_sequence<sizeof...(Ts)>{});
    return res;
  }
  template <class T>
  void vvec(vector<vector<T>>& v, int n, int m) {
    v.resize(n);
    for (auto& e : v) vec(e, m);
  }
  template <class T>
  vector<vector<T>> vvec(int n, int m) {
    vector<vector<T>> v;
    return vvec(v, n, m), v;
  }
  template <class... Ts>
  auto cols(int n) {
    return transpose(vec<tuple<Ts...>>(n));
  }
 private:
  char buf[BufSize], *p = buf;
  void skip() {
    while (*p <= ' ') p++;
  }
  template <class T, size_t... Is>
  void read_tuple_impl(T& x, index_sequence<Is...>) {
    (*this)(get<Is>(x)...);
  }
  template <class T, size_t... Is>
  void vecs_impl(T& x, int n, index_sequence<Is...>) {
    (vec(get<Is>(x), n), ...);
  }
  template <class T, size_t... Is>
  static auto transpose_impl(const vector<T>& v, index_sequence<Is...>) {
    tuple<vector<decay_t<tuple_element_t<Is, T>>>...> w;
    (get<Is>(w).reserve(v.size()), ...);
    for (const auto& row : v) (get<Is>(w).push_back(get<Is>(row)), ...);
    return w;
  }
  template <class T>
  static auto transpose(const vector<T>& v) {
    return transpose_impl(v, make_index_sequence<tuple_size_v<T>>{});
  }
};

template <size_t BufSize = 1 << 26>
class stdout_writer {
 public:
  ~stdout_writer() { flush(); }
  void flush() { fwrite(buf, 1, p - buf, stdout), p = buf; }
  void write_char(char c) { *p++ = c; }
  void write(char c) { write_char(c); }
  template <class T>
  enable_if_t<is_integral_v<T>> write(T x) {
    if (!x) return write_char('0');
    if constexpr (is_signed_v<T>)
      if (x < 0) write_char('-'), x = -x;
    static char tmp[16];
    char* q = end(tmp);
    while (x >= 10000)
      memcpy(q -= 4, digits.data + x % 10000 * 4, 4), x /= 10000;
    if (x < 10)
      write_char('0' + x);
    else if (x < 100)
      write_char('0' + (uint8_t)x / 10), write_char('0' + (uint8_t)x % 10);
    else if (x < 1000)
      memcpy(p, digits.data + x * 4 + 1, 3), p += 3;
    else
      memcpy(p, digits.data + x * 4, 4), p += 4;
    memcpy(p, q, end(tmp) - q), p += end(tmp) - q;
  }
  template <class T>
  void_t<decltype(&T::val)> write(T x) {
    write(x.val());
  }
  void write(double x) {
    static char tmp[40];
    sprintf(tmp, "%.10f", x);
    write(tmp);
  }
  void write(const char* s) {
    while (*s) *p++ = *s++;
  }
  void write(const string& s) { memcpy(p, s.c_str(), s.size()), p += s.size(); }
  template <class T, class U>
  void write(const pair<T, U>& x) {
    write(x.first), write_char(' '), write(x.second);
  }
  template <class... Ts>
  void write(const tuple<Ts...>& x) {
    write_tuple(x, make_index_sequence<sizeof...(Ts)>{});
  }
  template <class... Ts>
  void write(const Ts&... xs) {
    ((write(xs), write_char(' ')), ...), --p;
  }
  template <class... Ts>
  void writeln(const Ts&... xs) {
    write(xs...), write_char('\n');
  }
  template <class... Ts>
  void operator()(const Ts&... xs) {
    writeln(xs...);
  }
  template <class It>
  void iter(It first, It last, char sep = ' ') {
    if (first == last)
      write_char('\n');
    else {
      while (first != last) write(*first++), write_char(sep);
      p[-1] = '\n';
    }
  }
  void Yes(bool b = true) { writeln(b ? "Yes" : "No"); }
  void YES(bool b = true) { writeln(b ? "YES" : "NO"); }
  void Takahashi(bool b = true) { writeln(b ? "Takahashi" : "Aoki"); }
 private:
  char buf[BufSize], *p = buf;
  template <class T, size_t... Is>
  void write_tuple(const T& x, index_sequence<Is...>) {
    ((write(get<Is>(x)), write_char(' ')), ...), --p;
  }
  struct four_digits {
    char data[40000];
    constexpr four_digits() : data() {
      for (int i = 0; i < 10000; i++)
        for (int n = i, j = 4; j--;) data[i * 4 + j] = n % 10 + '0', n /= 10;
    }
  } static constexpr digits{};
 public:
#define INSTANT(s) \
  void s() { writeln(#s); }
  INSTANT(No)
  INSTANT(NO) INSTANT(Aoki) INSTANT(possible) INSTANT(Possible)
      INSTANT(POSSIBLE) INSTANT(impossible) INSTANT(Impossible)
          INSTANT(IMPOSSIBLE)
#undef INSTANT
};

stdin_reader<> in;
stdout_writer<> out;

#line 2 "main.cpp"

int n = in;
int *a = in.arr<int>(n);

int main() {
  int sgn = 1;
  rep(i, n) rep(j, i) if (a[j] > a[i]) sgn *= -1;
  out(sgn);
}
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