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())

x=1

while n>(10**(len(str(x))-1)*9*len(str(x))):
    n-=10**(len(str(x))-1)*9*len(str(x))

    x*=10
    
t=len(str(x))
nadighe=False
while nadighe==False:
    qw=1
    nadighe=True
    while n>(10**(len(str(qw))-1)*9*t):
        n-=10**(len(str(qw))-1)*9*t
        nadighe=False
        qw*=10
    x+=qw-1
   
    
while n>len(str(x)):
    n-=len(str(x))
    x+=1
for i in range(len(str(x))):
    if n!=0:
        s=str(x)[i]
        n-=1
print(s)
    
