Phase 5 / segment tree, binary search
Phase 6 / tree/path-query
Phase 6 / segment-tree/order-statistics
Phase 6 / prefix-sum/queries
Phase 6 / persistent_trie, offline_queries
Phase 4 / tree_queries, offline_processing
Phase 5 / mo_algorithm, fenwick
Phase 5 / bfs, multi-state_shortest
Phase 4 / tree_queries, mo_on_tree