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, = map(long, raw_input().split())

starprev = 0
newprev = 0
len = 0
for len in xrange(1, 1000):
    newprev = starprev * 10 + 9
    if n <= (newprev - starprev) * len:
        break
    else:
        n -= (newprev - starprev) * len
        starprev = newprev
num_index = (n + len - 1) // len + starprev
in_index = n % len
if in_index == 0:
    in_index = len
in_index -= 1
print str(num_index)[in_index]