UVa : 10656


// @BEGIN_OF_SOURCE_CODE

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <vector>
#include <map>
#include <sstream>
#include <set>
#include <math.h>
#define N 1000000
using namespace std;


int main ()
{
    int n;
    int a [1000 + 10];

    while ( scanf ("%d", &n) && n ) {

        bool space = false;

        for ( int i = 0; i < n; i++ ) {
            scanf ("%d", &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;
}

// @END_OF_SOURCE_CODE

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