int n = 1;
int m = 1;
int n_max = 6;

for ( n = 1; n <= n_max; n++ )
{
    if ( ( n % 2 ) ==  0 )
    {
        m = n;
        goto even;
    }
    else
    {
        m = n;
        goto odd;
    }
back:;
}

even:
    for ( int i = m; i >= 1; i-- )
    {
        char buffer[1024];
        printf( "%i", i );
        if ( i > 1 ) printf( "-" );
    }
    printf( "\n" );
    if ( m >= n_max ) goto exit_label; else goto back;
odd:
    for ( int i = 1; i <= m; i++ )
    {
        char buffer[1024];
        printf( "%i", i );
        if ( i < m ) printf( "-" );
    }
    printf( "\n" );
    if ( m >= n_max ) goto exit_label; else goto back;

exit_label: