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