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 lint(n):    #to find length of an integer
    h = int(n)
    i= 0
    while(h>0):
          h= int(h/10)
          i=i+1
    len =i
    return len


k =int(input())
list = [1]
n=1
y=1
for y in range (1,k):
        n = n+1;
        p= lint(n)
        for i in range(p,0,-1):
                e= 10**(i-1)
                x = int(n/e)
                z= x%10 
                list.append(z)


        y = y+p
print(list[k-1])

