n,k=map(int,input().split())
print('YNEOS'[(n+1)//2<k::2]) n,k=map(int,input().split()) n map(int,input().split()) map int input().split() ().split () input split k print('YNEOS'[(n+1)//2<k::2]) print 'YNEOS'[(n+1)//2<k::2] 'YNEOS' (n+1)//2<k::2 (n+1)//2<k (n+1)//2 n+1 n 1 2 k 2 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())
print('YNEOS'[(n+1)//2<k::2])