Hello Codeforces! I cannot include the files #include<ext/pb_ds/assoc_container.hpp> and #include<ext/pb_ds/tree_policy.hpp> in my code. They were giving me an undefined file error. So what i did was that i downloaded these files from a github repo of gcc files. This was the repo : https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/ext/pb_ds/tree_policy.hpp

Now the files were being included but the next typedef line was giving me undefined errors

what do i do now? is it such that these pbds are exclusive to the gnu/g++/gcc compilers or is there a way? Please help me. Thank you!