write a go solution for Description:
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 Format:
The first and only line contains integer k (1<=k<=10000) — the position to process (1-based index).

Output Format:
Print the k-th digit of the resulting infinite sequence.

Note:
None. Output only the code with no comments, explanation, or additional text.