n, k = map(int, input().split())
if (n//2 + n%2) >= 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 + n%2) >= k:
  print('YES')
else:
  print('NO') (n//2 + n%2) >= k n//2 + n%2 n//2 n 2 n%2 n 2 k print('YES') print 'YES' print('NO') print 'NO' k = map(int, input().split()) map(int, input().split()) k n, k = map(int, input().split()) map(int, input().split()) n
n, k = map(int, input().split())
if (n//2 + n%2) >= k:
  print('YES')
else:
  print('NO')