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