blog for imp blog Tutorials / Good question banks Prefix Sum Tricks for specific set of problems Unordered map, A-Z Parallel binary search Graph algorithms DSU Trick 1-D range Queries for some XOR related problems, trick DSU on tree LGM's optimizations Languages must used STL C++ tips and tricks C++ 17 for cp C++ Tricks C++ 11 for cp How to write good code Debugging Catching silly mistakes using GCC Solutions CSES DP section Atcoder Way to practice