Write a function to find nth polite number. geeksforgeeks.org/n-th-polite-number/
import math 
def is_polite(n): 
	n = n + 1
	return (int)(n+(math.log((n + math.log(n, 2)), 2))) 
assert is_polite(7) == 11 assert is_polite(4) == 7 assert is_polite(9) == 13