Optional #![forbid(unsafe_code)]

rithmic

Utility

• Print methods
• Incremental min / max
• Ordered pair
• Option merge
• Result unwrap-any
• Rangelike, a trait accepting integers and integer ranges
• Unsigned integers as bitsets
• Mixed-radix counter
• Child process spawn and pipe

Procedural macros

• #[autofill] Pseudo-capture function arguments
• #[memoize] Function memoization (caching)
• #[derive(CmpByKey)] Order structs by a subset of fields
• struct_input! Use ::proconio to read data into a struct and set up helper macros
• #[transparent], #[semitransparent], #[opaque] Modify declarative macro hygiene

Algorithms

• Binary search
• Ternary search
• Index compression
• Prefix sums
• Graph
  • Dijkstra, 0-1 Dijkstra, BFS ⚙️
  • Floyd-Warshall ⚙️
  • DFS ⚙️
  • Tarjan SCC ⚙️
  • Rooted subtree function "rerooting"
• Mo's algorithm
• Inversion counting ⚙️

Data Structures

• Tensor ("n-dimensional vector") ⚙️
• Boolean/bit vector
• Meldable heap
• Generic augmented treap ⚙️
  • Generic order-statistic treap ⚙️
    • List, a sequence with O(log n) insert/delete ⚙️
    • SortedList, with rank- and order-statistics ⚙️
• Generic sparse table ⚙️
• Generic segment tree supports lazy updates and "segtree beats" ⚙️
• n-dimensional Fenwick tree (binary-indexed tree) ⚙️
• Union-find
• XOR basis

Math

• Triangular numbers
• All divisors of an integer using ::primal::Sieve
• Factorials mod n using ::ac_library::modint ⚙️
• Polynomial arithmetic ⚙️
  • Lagrange interpolation ⚙️
• A few extra methods for ::euclid::Vector2D ⚙️

Misc

• Gameboard

Items marked ⚙️ are working and tested but missing documentation - email or open an issue and I will add it

Features

unsafe

• By default, this crate uses #![forbid(unsafe_code)] to guarantee no undefined behavior (UB). The unsafe feature drops this attribute to enable some performance gains
• The library is still written such that UB should not be possible; however this becomes no longer verifiable by the compiler
• Currently, this affects: NdVec, BVec, NdFenwick