my @add;
for my $arr (@tmp_container) {
    if( @{$arr->[0]} > 2 ) {
        my @val1 = @{$arr->[0]};
        my @val2 = @{$arr->[1]};
        @add=(\@val1,\@val2);
    }
    else {
        unshift( @{$arr}, [ @{$add[0]} ], [ @{$add[1]} ]);
    }
}