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

if k+(k-1) <= n:
    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 k+(k-1) <= n:
    print("YES")
else:
    print("NO") k+(k-1) <= n k+(k-1) k k-1 k 1 n 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 k+(k-1) <= n:
    print("YES")
else:
    print("NO")