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())

if n<=9:
    print(n)
    exit(0)

a=9
b=1

while True:
    if n > b*a :
        n=n-(b*a)
        a*=10
        b+=1
    else:
        break

#print(n, a, b)

dig = 10**(b-1)

q=(n-1)//b
r=(n-1)%b

num = dig + q

#print(num ,r)

print(str(num)[r])