Weird Subtraction

You are given two integers $n$ and $m$. You have to subtract $m$ from $n$ until $n$ becomes less than or equal to $m$. See the procedure below.

while (n > m) {
    n = n - m;
}

Input

The only line in the input contains $n$ and $m$ ($1 ≤ n, m ≤ 10^{18}$).

Output

Print $n$ after the end of subtraction.

Samples

2 1

1

100 10

10