import math def get_raw_num(n):     num = 0     for i in range(1,n+1):         num += len(str(i))     return num def get_sum_all(n):     sum = 0     for i in range(1,n+1):         sum += get_raw_num(i)     return sum def get_sub(k):     start = k     while(get_sum_all(start) > k):         start -= 1     sub = k - get_sum_all(start)     out = []     for i in range(1,k):         list_i = list(map(int,list(str(i))))         for j in list_i:             if len(out) == sub:                 return j             out.append(j) print(get_sub(100))