test/atcoder/other/yahoo2019/A.test.cpp

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Last update: 2023-07-08 14:12:19+09:00
Problem: https://atcoder.jp/contests/2019yahoo_qual/tasks/2019yahoo_qual_a

Depends on

Code

#define PROBLEM "https://atcoder.jp/contests/2019yahoo_qual/tasks/2019yahoo_qual_a"
#include <bits/stdc++.h>
using namespace std;

#include "math/ceil-div.hpp"
using namespace matumoto;

int main() {
  int n, k;
  cin >> n >> k;

  cout << (ceil_div(n, 2) >= k ? "YES" : "NO") << endl;
}

#line 1 "test/atcoder/other/yahoo2019/A.test.cpp"
#define PROBLEM "https://atcoder.jp/contests/2019yahoo_qual/tasks/2019yahoo_qual_a"
#include <bits/stdc++.h>
using namespace std;

#line 2 "math/ceil-div.hpp"

#line 2 "math/base.hpp"

namespace matumoto {
  using namespace std;
  using ll = long long;
} // namespace matumoto
#line 4 "math/ceil-div.hpp"

#line 6 "math/ceil-div.hpp"

namespace matumoto {
  constexpr ll ceil_div(ll n, ll d) {
    assert(d != 0);
    return n / d + (((n ^ d) >= 0) and (n % d));
  }
} // namespace matumoto
#line 6 "test/atcoder/other/yahoo2019/A.test.cpp"
using namespace matumoto;

int main() {
  int n, k;
  cin >> n >> k;

  cout << (ceil_div(n, 2) >= k ? "YES" : "NO") << endl;
}