結果

問題 No.1557 Binary Variable
ユーザー stoqstoq
提出日時 2021-06-25 21:46:57
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 109 ms / 2,000 ms
コード長 3,296 bytes
コンパイル時間 2,323 ms
コンパイル使用メモリ 213,548 KB
実行使用メモリ 11,356 KB
最終ジャッジ日時 2024-06-25 08:22:36
合計ジャッジ時間 7,441 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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 69 ms
9,836 KB
testcase_01 AC 94 ms
10,308 KB
testcase_02 AC 2 ms
6,940 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 101 ms
9,452 KB
testcase_05 AC 99 ms
9,576 KB
testcase_06 AC 96 ms
9,580 KB
testcase_07 AC 99 ms
9,704 KB
testcase_08 AC 101 ms
9,576 KB
testcase_09 AC 100 ms
9,708 KB
testcase_10 AC 105 ms
10,608 KB
testcase_11 AC 105 ms
9,840 KB
testcase_12 AC 102 ms
10,500 KB
testcase_13 AC 105 ms
9,580 KB
testcase_14 AC 101 ms
9,580 KB
testcase_15 AC 106 ms
10,764 KB
testcase_16 AC 102 ms
9,580 KB
testcase_17 AC 101 ms
9,964 KB
testcase_18 AC 104 ms
9,708 KB
testcase_19 AC 102 ms
9,580 KB
testcase_20 AC 100 ms
10,472 KB
testcase_21 AC 101 ms
11,044 KB
testcase_22 AC 100 ms
11,248 KB
testcase_23 AC 103 ms
10,472 KB
testcase_24 AC 105 ms
10,904 KB
testcase_25 AC 103 ms
11,356 KB
testcase_26 AC 104 ms
11,120 KB
testcase_27 AC 106 ms
9,712 KB
testcase_28 AC 106 ms
10,352 KB
testcase_29 AC 108 ms
9,708 KB
testcase_30 AC 108 ms
9,964 KB
testcase_31 AC 107 ms
10,524 KB
testcase_32 AC 109 ms
10,216 KB
testcase_33 AC 103 ms
10,220 KB
testcase_34 AC 2 ms
6,940 KB
testcase_35 AC 2 ms
6,944 KB
testcase_36 AC 2 ms
6,940 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 #

#define MOD_TYPE 1

#pragma region Macros

#include <bits/stdc++.h>
using namespace std;

#if 1
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif

#if 0
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/tag_and_trait.hpp>
#include <ext/rope>
using namespace __gnu_pbds;
using namespace __gnu_cxx;
template <typename T>
using extset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#endif

#if 0
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename T>
using smaller_queue = priority_queue<T, vector<T>, greater<T>>;

constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr ld PI = acos(-1.0);
constexpr ld EPS = 1e-7;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};

#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";

struct io_init
{
  io_init()
  {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << setprecision(30) << setiosflags(ios::fixed);
  };
} io_init;
template <typename T>
inline bool chmin(T &a, T b)
{
  if (a > b)
  {
    a = b;
    return true;
  }
  return false;
}
template <typename T>
inline bool chmax(T &a, T b)
{
  if (a < b)
  {
    a = b;
    return true;
  }
  return false;
}
inline ll CEIL(ll a, ll b)
{
  return (a + b - 1) / b;
}
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val)
{
  fill((T *)array, (T *)(array + N), val);
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept
{
  is >> p.first >> p.second;
  return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> &p) noexcept
{
  os << p.first << " " << p.second;
  return os;
}
#pragma endregion

// --------------------------------------

void solve()
{
  int n, m;
  cin >> n >> m;
  vector<array<int, 3>> v;
  repi(i, m)
  {
    int l, r;
    cin >> l >> r;
    v.push_back({l, 0, i});
    v.push_back({r, 1, i});
  }
  sort(all(v));
  vector<int> w;
  vector<int> used(m, 0);
  int cnt = 0;
  for (auto [t, type, i] : v)
  {
    if (used[i])
      continue;
    if (type == 0)
    {
      w.push_back(i);
    }
    else
    {
      for (auto j : w)
        used[j] = true;
      cnt++;
      w.clear();
    }
  }
  cout << n - cnt << "\n";
}

int main()
{
  solve();
}
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