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 f(x):
    ret=0
    while x > 0:
        ret += 1
        x = x // 10
    return ret

n=int(input())
id=0
for i in range(1,10000):
    if n - f(i) > 0:
        n -= f(i)
    elif n - f(i) == 0:
        n -= f(i)
        id=i
        break
    else:
        id=i
        break;
s=str(id)
print(s[n-1])

