I don't get this problem at all. can you please help. It's in C++

/sc.-..) /-week-//challengesnd-point Find the Point by HackerRank Problem Submissions Leaderboard Consider two points, p = (pr , ps) and q = (qiNy). We consider the inversion or point reflection,-(rnry), of point p across point g to be a 180" rotation of point p around g Given n sets of points p and q, find r for each pair of points and print two space-separated integers denoting the respective values of re and Ty on a new line. Input Format The first line contains an integer, n, denoting the number of sets of points. Each of the n subsequent lines contains four space-separated integers describing the respective values of pa. Py da r and g, defining points p = (Pa i Po ) and q (gz . A ).. : Constraints