n,k= map(int, input().split())
if n%2==0:
  if n/2>=k:
    print('YES')
  else:
    print('NO')
if not n%2==0:
  if n/2+1>=k:
    print('YES')
  else:
    print('NO') n,k= map(int, input().split()) n map(int, input().split()) map int input().split() ().split () input split k if n%2==0:
  if n/2>=k:
    print('YES')
  else:
    print('NO') n%2==0 n%2 n 2 0 if n/2>=k:
    print('YES')
  else:
    print('NO') n/2>=k n/2 n 2 k print('YES') print 'YES' print('NO') print 'NO' if not n%2==0:
  if n/2+1>=k:
    print('YES')
  else:
    print('NO') not n%2==0 n%2==0 n%2 n 2 0 if n/2+1>=k:
    print('YES')
  else:
    print('NO') n/2+1>=k n/2+1 n/2 n 2 1 k print('YES') print 'YES' print('NO') print 'NO' n,k= map(int, input().split()) map(int, input().split()) n k= map(int, input().split()) map(int, input().split()) k
n,k= map(int, input().split())
if n%2==0:
  if n/2>=k:
    print('YES')
  else:
    print('NO')
if not n%2==0:
  if n/2+1>=k:
    print('YES')
  else:
    print('NO')