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.
Updated: Yesterday
Wavelet Tree
Has Not Appeared
Efficiently querying for the kth minimum element in a subarray.
Updated: Yesterday
Counting Minimums with Segment Tree
Has Not Appeared
Querying for the minimum and number of occurrences of minimum in a range
Updated: Yesterday
Segment Tree Beats
Rare
Perform chmin and chmax range updates
Updated: Yesterday
Persistent Data Structures
Rare
What if data structures could time travel?
Updated: Yesterday
Treaps
Not Frequent
A randomized binary search tree
Updated: Yesterday
Convexity
Graphs
Shortest Paths with Negative Edge Weights
Has Not Appeared
Returning to Bellman-Ford and Floyd-Warshall.
Updated: Yesterday
Eulerian Tours
Has Not Appeared
Visiting all edges of a graph exactly once.
Updated: Yesterday
BCCs and 2CCs
Rare
Updated: Yesterday
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: Yesterday
Offline Deletion
Has Not Appeared
Erasing from non-amortized insert-only data structures.
Updated: Yesterday
Euler's Formula
Rare
A formula for finding the number of faces in a planar graph.
Updated: Yesterday
Critical
Rare
Finding nodes that must be visited along any path.
Updated: Yesterday
Link Cut Tree
Rare
Dynamic operations on a rooted forest
Updated: Yesterday
Dynamic Programming
Flows
Maximum Flow
Rare
Introduces maximum flow.
Updated: 5 hours ago
Minimum Cut
Rare
Introduces minimum cut and the min-cut max-flow theorem.
Updated: 5 hours ago
Flow with Lower Bounds
Has Not Appeared
Adding lower bounds to flow edge constraints.
Updated: 5 hours ago
Minimum Cost Flow
Rare
Triangle Inequality, Johnson's Algorithm, and Min Cost Flow
Updated: Yesterday
Polynomials
Strings
String Searching
Rare
Knuth-Morris-Pratt and Z Algorithms (and a few more related topics).
Updated: Yesterday
Suffix Array
Rare
Quickly sorting suffixes of a string and its applications
Updated: Yesterday
String Suffix Structures
Has Not Appeared
Suffix Automata, Suffix Trees, and Palindromic Trees
Updated: Yesterday
Misc. Topics
Extended Euclidean Algorithm
Rare
?
Updated: Yesterday
Catalan Numbers
Rare
Updated: Yesterday
XOR Basis
Rare
Updated: Yesterday
Fracturing Search
Rare
A simple solution to "Robotic Cow Herd" that generalizes.
Updated: Yesterday
Game Theory
Has Not Appeared
Solving games that are usually two-player to find the winner.
Updated: Yesterday
Prefix Sums of Number-Theoretic Functions (Part 1)
Has Not Appeared
Introduces Dirichlet convolution.
Updated: Yesterday
Prefix Sums of Number-Theoretic Functions (Part 2)
Has Not Appeared
How to count primes.
Updated: Yesterday
Matroid Intersection
Has Not Appeared
?
Updated: Yesterday
Randomness
Has Not Appeared
Using randomized algorithms to solve problems.
Updated: Yesterday
Interactive and Communication Problems
Rare
Some tips and tricks
Updated: Yesterday
Vectorization in C++
Has Not Appeared
?
Updated: Yesterday