Problem:
 Score : 300 points    Problem Statement To make it difficult to withdraw money, a certain bank allows its customers to withdraw only one of the following amounts in one operation:    1 yen (the currency of Japan)    6 yen, 6^2(=36) yen, 6^3(=216) yen, ...    9 yen, 9^2(=81) yen, 9^3(=729) yen, ...    At least how many operations are required to withdraw exactly N yen in total?  It is not allowed to re-deposit the money you withdrew.      Constraints  1 \leq N \leq 100000  N is an integer.         Input Input is given from Standard Input in the following format:  N       Output If at least x operations are required to withdraw exactly N yen in total, print x .        Sample Input 1 127      Sample Output 1 4  By withdrawing 1 yen, 9 yen, 36(=6^2) yen and 81(=9^2) yen, we can withdraw 127 yen in four operations.       Sample Input 2 3      Sample Output 2 3  By withdrawing 1 yen three times, we can withdraw 3 yen in three operations.       Sample Input 3 44852      Sample Output 3 16

Solution (Python):
a = [1, 2, 3, 4, 5, 1, 2, 3, 1, 2, 3, 2, 3, 4, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 1, 2, 3, 4, 5, 6, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 2, 3, 4, 5, 6, 7, 3, 4, 5, 1, 2, 3, 4, 5, 6, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 3, 4, 5, 5, 6, 7, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 1, 2, 3, 4, 5, 6, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 3, 4, 5, 5, 6, 7, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 1, 2, 3, 4, 5, 6, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 1, 2, 3, 4, 5, 6, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 3, 4, 5, 5, 6, 7, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 2, 3, 4, 5, 6, 7, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 4, 5, 6, 6, 7, 8, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 4, 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7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 5, 6, 7, 7, 8, 9, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 7, 8, 9, 9, 10, 11, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 7, 8, 9, 9, 10, 11, 8, 9, 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11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 6, 7, 8, 9, 10, 11, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 8, 9, 10, 10, 11, 12, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 9, 10, 11, 12, 13, 14, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 10, 11, 12, 12, 13, 14, 11, 12, 13, 11, 12, 13, 12, 13, 14, 12, 13, 14, 10, 11, 12, 13, 14, 15, 11, 12, 13, 7, 8, 9, 10, 11, 12, 8, 9, 10, 8, 9, 10, 9, 10, 11, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 10, 11, 12, 11, 12, 13, 11, 12, 13, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 8, 9, 10, 11, 12, 13, 9, 10, 11, 9, 10, 11, 10, 11, 12, 10, 11, 12, 9, 10, 11, 11, 12, 13, 10, 11, 12, 3, 4, 5, 6, 7, 8, 4, 5, 6, 4, 5, 6, 5, 6, 7, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 7, 8, 9, 8, 9, 10, 8, 9, 10, 5, 6, 7, 8, 9, 10, 6, 7, 8, 4, 5, 6, 7, 8, 9, 5, 6, 7, 5, 6, 7, 6, 7, 8, 6, 7, 8, 6, 7, 8, 7, 8, 9, 7, 8, 9, 6, 7, 8, 8, 9, 10, 7, 8, 9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 6, 7]

print(a[int(input()) - 1])