Subject: Data Structure and Algorithm

Give the explanation of this code.

Solve with C$++$ programming Language

Activity Selection Problem

Problem Description: Suppose we have a set $S=\{a_{-}1,a_{-}2,$dots,$a_{-}n\}$ of $n$ proposed

activities that wish to use a resource, such as a lecture hall, which can serve only

one activity at a time. Each activity $a_{-}$i has a start time $s_{-}$i and a finish time $f_{-}i,$

where $\{$:$s_{-}i,f_{-}i)a_{-}i{a}_{-}j{s}_{-}i,f_{-}i{a}_{-}i{a}_{-}j{s}_{-}i{f}_{}j{s}_{-}j{f}_{-}i$