n, k = map(int, input().split())

print('YES') if k <= (n + 1) // 2 else print('NO') n, k = map(int, input().split()) n map(int, input().split()) map int input().split() ().split () input split k print('YES') if k <= (n + 1) // 2 else print('NO') k <= (n + 1) // 2 k (n + 1) // 2 n + 1 n 1 2 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())

print('YES') if k <= (n + 1) // 2 else print('NO')