Numbers of the same sign

Two nonzero integers $n$ and $m$ are given. Print $1$, if numbers $n$ and $m$ have the same sign and $0$ otherwise.

Input

Two nonzero integers $n$ and $m$ , no more than $10^9$ by absolute value.

Output

Print $1$, if numbers $n$ and $m$ have the same sign and $0$ otherwise.

Examples