CF922C.Cave Painting

Imp is watching a documentary about cave painting.

Some numbers, carved in chaotic order, immediately attracted his attention. Imp rapidly proposed a guess that they are the remainders of division of a number $n$ by all integers $i$ from $1$ to $k$ . Unfortunately, there are too many integers to analyze for Imp.

Imp wants you to check whether all these remainders are distinct. Formally, he wants to check, if all , $1<=i<=k$ , are distinct, i. e. there is no such pair $(i,j)$ that:

• $1 \leq i < j \leq k$ ,
• , where is the remainder of division $x$ by $y$ .

The only line contains two integers $n$ , $k$ $(1<=n,k<=10^{18})$ .

Print "Yes", if all the remainders are distinct, and "No" otherwise.

You can print each letter in arbitrary case (lower or upper).

In the first sample remainders modulo $1$ and $4$ coincide.