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 ≤ k ≤ 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
n = int(input())
counter = 0
cur_number = 0
cur_array = list()
while counter < n:
    cur_number += 1
    cur = cur_number
    result = 0
    cur_array = list()
    while cur > 0:
        cur_array.append(cur % 10)
        cur //= 10
    cur_array.reverse()
    for i in cur_array:
        result = i
        counter += 1
        if counter == n:
            break
print(result)
