#include <stdio.h>

int n,x;
int a[10];
int i,t;

int _max(int s1,int s2,int x)
{
if (x==n)
return s1+s2;
else {
int t1,t2;
if (x*2-1<=n)
t1 = _max(s1,s2+s1,x*2-1);
else
t1 = 0;
if (x*2+1<=n)
t2 = _max(s1+s2,s2,x*2+1);
else
t2 = 0;
if ((t1==t2)&&(t2==0))
return s1+s2;
else
return t1>t2?t1:t2;
}
}

int main()
{
scanf("%d",&n);
i = 0;
while (n){
if (n==2)
a[i] = 1;
else
if (n==1)
a[i] = 1;
else
if (n==0)
a[i] = 0;
else
a[i] = _max(1,1,3);
scanf("%d",&n);
i++;
}
for (n = 0;n<i;n++)
printf("%d\n",a[n]);

return 0;
}