CF1177A.Digits Sequence (Easy Edition)

普及/提高-

通过率：0%

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题目描述

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.

输入格式

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

输出格式

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

输入输出样例

输入#1
```
7
```
输出#1
```
7
```
输入#2
```
21
```
输出#2
```
5
```

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