#include <iostream>
using namespace std;

long indec(long number) {
	int a;//разряд
	int b = 0;//степень двойки
	int result = 0;//переведенное число
	while (number != 0)
	{
		a = number % 10;//разряд
		number = number / 10;
		if (b == 0)

			b = 1;

		if (b != 0)

			a *= b;

		result += a;
		b *= 5;
	}
	return result;
}


void dtp(int n) {
	if (n >= 15)
		dtp(n / 15);
	cout << n % 15;
}

int main() {
	long number;
	cout << "\nnumber of pyatirichnaya = ";
	cin >> number;
	cout << "to";
	cout << "\ndec = " << indec(number);
	int n;
	cout << "\nnumber of dec = ";
	cin >> n;
	cout << "to";
	cout << "\npyatnadtsatirichnaya = ";
	dtp(n);
	return 0;
}