In c++ please

Probiem A. Arya Input file: standard input standard output 1 second 256 megabytes Output fle: Time limit Memory limit: Arya Stark wants to take dancing lessons. Given how much she loves dancing she wants to practice with her dancing master as much as possible. Her dancing master will be around for n days, and he will be available for training some h number of hours each day. As Arya usually has to skip some important banquet or tournament in order to practice, her father will only let her practice on k of the n days. How many hours can Arya practice in total, if she chooses her days optimally? Input The first line of input consists of two integers, n and k (1sks100), reresenting the number of days Arya's dancing master is available, and the number of days Arya is allowed to practice. Each of the next n lines contains a number h (1Shs10) describing the number of hours of the given practice Output Out put a single integer giving the maximum number of hours Arya can spend practcing. Example standard output 7 3 10 Note I: They're actually sword fighting lessons, but that's a secret kept between Arya and her father In the first test case, since Arya can practice on 3 days, she will choose the first, fourth, and sixth days for a total of 6+10+7-23 hours of practice