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
def decimal2Str(a : int):
    x = list()
    while a > 0:
        x = [str(a % 10)] + x
        a = int(a/10)
    return x
k = int(input())
index,adddigit = 1, 1
ans = []
tmp = k
while tmp >= adddigit:
    ans = ans + decimal2Str(index)
    index+=1
    tmp -= adddigit
    if index >= (10 ** adddigit):
        adddigit += 1
ln = len(ans)+tmp
if tmp > 0:
    ans = ans + decimal2Str(index)

print(ans[ln-1])