Move All Negative Elements to end

Approach Explanation o( ￣▽￣ )o I collected positives and negatives separately. I concatenated them in the correct order. I reassigned the result back to arr[:] so the original array is updated. This way, positives stay at the front, negatives move to the end, and the order is preserved. Methods Used: (*￣o￣)/ List comprehension Stable partition method Single traversal Extra space