G. Qpert pg yep
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Upi str hobrm s miznrt $$$m$$$, qtomy yjr smdert.

Input

$$$$$$1 \le m \le 10^9$$$$$$

Output

Qtomy s domhar omyrhrt.

Examples
Input
1
Output
1
Input
2
Output
2
Input
5
Output
6
Input
4
Output
8
Input
7
Output
4