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
num = input()
num = int(num)
lst = []
i = 1
count = 0
index = -1

while (count<num):
    strI = str(i)
    strI = list(strI)
    for n in range(0,len(strI)):
        lst.append(strI[n])
    if(i>=1000):
        count+=4
    elif(i>=100):
        count+=3
    elif(i>=10):
        count+=2
    else:
        count+=1
    i+=1

if count != num:
    diff = count - num
    index -= diff

ans = (lst[index])
finalAns = ''.join(ans)
print(finalAns)
