a, b = map(int, input().split())
if a >= 2 * b - 1:
    print("YES")
else:
    print("NO") a, b = map(int, input().split()) a map(int, input().split()) map int input().split() ().split () input split b if a >= 2 * b - 1:
    print("YES")
else:
    print("NO") a >= 2 * b - 1 a 2 * b - 1 2 * b 2 b 1 print("YES") print "YES" print("NO") print "NO" a, b = map(int, input().split()) map(int, input().split()) a b = map(int, input().split()) map(int, input().split()) b
a, b = map(int, input().split())
if a >= 2 * b - 1:
    print("YES")
else:
    print("NO")