#include<bits/stdc++.h>
using namespace std;
int main ()
{
int n;
int a [1010+2];
while (cin>>n&&n)
{
bool space = false;
for ( int i=0; i<n; i++ )
cin>>a[i];
for ( int i=0; i<n; i++)
{
if (a[i])
{
if (space)
printf (" ");
space = true;
printf ("%d", a[i]);
}
}
if ( !space )
printf ("0");
printf ("\n");
}
return 0;
}
using namespace std;
int main ()
{
int n;
int a [1010+2];
while (cin>>n&&n)
{
bool space = false;
for ( int i=0; i<n; i++ )
cin>>a[i];
for ( int i=0; i<n; i++)
{
if (a[i])
{
if (space)
printf (" ");
space = true;
printf ("%d", a[i]);
}
}
if ( !space )
printf ("0");
printf ("\n");
}
return 0;
}
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