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())
s=0
i=1
c=1
while(s<n):
    s+=9*i*c
    c+=1
    i*=10
n=n-s+9*i*(c-1)//10
c=c-1
r=n%c
d=n//c
k=10**(c-1)+d
if(r==0):
    print(int(str(k-1)[-1]))
else:
    print(int(str(k)[r-1]))

