#include<stdio.h>
int ternary(int);
int main()
{
int num;
//freopen("in.txt","r",stdin);
while(scanf("%ld",&num) && num>=0)
{
if(!num)
printf("0\n");
else
{
ternary(num);
printf("\n");
}
}
return 0;
}
int ternary(int n)
{
if(n==0)
return 1;
else ternary(n/3);
printf("%d",n%3);
}
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