hi everybody! can someone propose me a way to install c++ compiler on mac m2

Hi everybody! Can you suggest interesting and difficult problems related to segment tree.(don't pay attention to my rating it's second account).

Hello everybody! This is my second account and I want to upgrade my skills of solving problems on codeforces. On my first account my maximum rating was at 1315, despite on my rating I know many algorithms like dfs, bfs, dp, segtree, sqrt-decomposition, binary search, disjoint sets union and other popular algorithms related to graphs. However, I use them rarely, because of, intresting and difficult problems rated approximately at 2000, but, I have some difficulties with solving div 2 C, so I have started solving 1700 problems, but, I want to ask from experienced competitive programmers are there any other ways to upgrade my skills essentially?