Dynamic programming question

Question

A circus is designing a tower routine consisting of people standing atop one another’s shoulders. For practical and aesthetic reasons, each person must be both shorter and light

Answer 1

Result of 1 and 2 has to be same. It's not possible that one of them is shorter, because in a solution elements are descending both in height and weight so if it satisfies 1 or 2 it will satisfy the other as well, If it would be shorter it wouldn't be the longest.