UVa 11185 Ternary

一魚四吃...哈哈= ="

	/**
	* UVa 11185 Ternary
	* Author: chchwy
	* Last Modified: 2010.02.03
	*/
	#include<iostream>
	using namespace std;
	inline char DigitToChar(int n)
	{
	return "0123456789ABCDEF"[n];
	}
	/* convert int 'value' to string 'out' */
	string toBase( int base2, long long value )
	{
	if (value == 0) return "0";
	string out;
	while ( value > 0 )
	{
	out += DigitToChar( value % base2 );
	value /= base2;
	}
	reverse(out.begin(), out.end());
	return out;
	}
	int main()
	{
	int n;
	while (scanf("%d", &n) == 1 && n >= 0)
	printf("%s\n", toBase(3, n).c_str() );
	return 0;
	}

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