A. Digits Sequence (Easy Edition)
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Let's write all the positive integer numbers one after another from $$$1$$$ without any delimiters (i.e. as a single string). It will be the infinite sequence starting with 123456789101112131415161718192021222324252627282930313233343536...

Your task is to print the $$$k$$$-th digit of this sequence.

Input

The first and only line contains integer $$$k$$$ ($$$1 \le k \le 10000$$$) — the position to process ($$$1$$$-based index).

Output

Print the $$$k$$$-th digit of the resulting infinite sequence.

Examples
Input
7
Output
7
Input
21
Output
5