Problems
Function 9
Function 9
Write a program that finds the value of the function
$$
f(m, n) = \begin{cases}
f(m - n, n), m > n \\
n, m = n \\
f(n - m, m), n > m
\end{cases}
$$
\InputFile
Two positive integers $n$ and $m~(1 \le n, m \le 10^{18})$.
\OutputFile
Print the value of the function $f(m, n)$.
Input example #1
6 3
Output example #1
3
Input example #2
12 12
Output example #2
12