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())

c = 1
total = 0

if n < 10:
    print(n)
else:
    while True:
        total_b = total
        cek = 9 * (10 ** (c - 1)) * c
        total += cek
        if n <= total:
            break
        c += 1
    n -= total_b + 1
    urut = n // c
    sisa = n % c
    angka = (10 ** (c - 1)) + urut
    print(str(angka)[sisa])
