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
# -*- coding: utf-8 -*-
"""
Created on Wed May  6 00:34:56 2020

@author: alexi
"""



#https://codeforces.com/problemset/problem/1177/A --- Alexis Galvan


def digits_sequence():
    
    number = int(input())
    
    if number < 10:
        return number
    
    string = ''
    temp = 1
    
    while len(string) < number:
        string += str(temp)
        temp += 1
    
    return string[number-1]

A = digits_sequence()
print(A)
    