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 in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>

int main(void) {
	int n;
	scanf("%d", &n);
	int m = n, max;
	int count = 0;
	while (n >= 0) {
		if (n <= 5) {
			count += n;
			n = -1;
			break;
		}
		int six = 6, nine = 9;
		for (int i = 1; i < 100; i++) {
			if (n < nine) {
				n -= six;
				count++;
				break;
			}
			else if (n < (six * 6)) {
				n -= nine;
				count++;
				break;
			}
			six *= 6;
			nine *= 9;
		}
	}
	n = m;
	max = count;
	count = 0;
	while (n >= 0) {
		if (n <= 5) {
			count += n;
			n = -1;
			break;
		}
		int six = 6, nine = 9;
		for (int i = 1; i < 100; i++) {
			if (n < nine) {
				if (count == 0) {
					n -= six;
					count++;
					break;
				}
				n -= six;
				count++;
				break;
			}
			else if (n < (six * 6)) {
				if (count == 0) {
					n -= six;
					count++;
					break;
				}
				n -= nine;
				count++;
				break;
			}
			six *= 6;
			nine *= 9;
		}
	}
	if (max > count)max = count;
	printf("%d", max);
	return 0;
}