Advanced
Some of these topics have not appeared in Platinum and probably never will (ex. Matroid Intersection).
Others have appeared in Old Gold or Platinum very infrequently (ex. BCC, Suffix Array).
Modules Progress
Problems Progress
Data Structures
Max Suffix Query with Insertions Only
Rare
A solution to USACO Gold - Springboards.
Wavelet Tree
Has Not Appeared
?
Counting Minimums with Segment Tree
Has Not Appeared
Querying for the minimum and number of occurences of minimum in a range
Segment Tree Beats
Rare
Perform chmin and chmax range updates
Updated: Last week
Persistent Data Structures
Rare
What if data structures could time travel?
Updated: Last week
Treaps
Not Frequent
A randomized binary search tree
Updated: Last week
Convexity
Graphs
Shortest Paths with Negative Edge Weights
Has Not Appeared
Returning to Bellman-Ford and Floyd-Warshall.
Updated: Last week
Eulerian Tours
Has Not Appeared
Visiting all edges of a graph exactly once.
Updated: Last month
BCCs and 2CCs
Rare
Updated: Last week
Strongly Connected Components
Rare
Subsets of nodes in directed graphs where each node in a subset can reach each other node in the subset.
Updated: Last week
Offline Deletion
Has Not Appeared
Erasing from non-amortized insert-only data structures.
Euler's Formula
Rare
A formula for finding the number of faces in a planar graph.
Critical
Rare
Finding nodes that must be visited along any path.
Updated: Last week
Link Cut Tree
Rare
Dynamic operations on a rooted forest
Updated: Last week
Dynamic Programming
Flows
Polynomials
Strings
String Searching
Rare
Knuth-Morris-Pratt and Z Algorithms (and a few more related topics).
Updated: Last week
Suffix Array
Rare
Quickly sorting suffixes of a string and its applications
Updated: Last week
String Suffix Structures
Has Not Appeared
Suffix Automata, Suffix Trees, and Palindromic Trees
Updated: Last week
Misc. Topics
Extended Euclidean Algorithm
Rare
?
Updated: Last month
Catalan Numbers
Rare
Updated: Last month
XOR Basis
Rare
Updated: Last week
Fracturing Search
Rare
A simple solution to "Robotic Cow Herd" that generalizes.
Updated: Last week
Game Theory
Has Not Appeared
Solving games that are usually two-player to find the winner.
Updated: Last week
Prefix Sums of Multiplicative Functions
Has Not Appeared
Covering Dirichlet convolution, Möbius inversion, and binomial inversion.
Updated: Last week
Matroid Intersection
Has Not Appeared
?
Interactive and Communication Problems
Rare
Some tips and tricks
Vectorization in C++
Has Not Appeared
?