#include<stdio.h>

int q[100][1000] = {0};
const int INF = 10;
void pp( int t)
{
    __int64 re = 1;
    int k = t;
    int i;
    q[k][0] = 1;
    while(t--)
    {
        for(i=0; i<1000 ; i++)
        {
            while(q[k][i] >= INF)
            {
                q[k][i+1] ++;
                q[k][i] -= INF;
            }
            q[k][i] *= 3;
        }
        for(i=0; i<1000; i++)
        {
            while(q[k][i] >= INF)
            {
                q[k][i+1] ++;
                q[k][i] -= INF;
            }
        }
    }
}

int main()
{
    __int64 n;
    int i;
    for(i=0; i<= 64; i++)
        pp(i);
    while(1)        
    {
        scanf("%I64d",&n);
        if( n == 0 ) break;
        printf("{");
        if ( n > 0 )
        {
            n--;
            int t = 0;
            int temp = 0;        
            while(n)
            {
                if( n&1 )
                {
                    if(temp)
                        printf(",");
                    printf(" ");
                    int aa = 0;
                    for(i=999; i>=0; i--)
                    {
                        if(q[t][i])
                            aa = 1;
                        if(aa)
                        {
                            printf("%d",q[t][i]);
                        }
                    }
                    temp = 1;
                }
                t++;
                n >>= 1;
            }
        }
        printf(" }\n");
    }
    return 0;
}

数学问题吧，和二进制有关系。地址：http://acm.pku.edu.cn/JudgeOnline/problem?id=1906