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