Check invariants and cost claims. Work through the operation contract, runnable case, and cost before selecting the structure for a real workload.
Lessons
Practice and next steps
- Project: choose structures for a dispatch board
- Project: audit depot connectivity and daily ranges
- Linear and hash structure decisions
- Tree, graph, and range structure decisions
- DSA Tutorial
Mutation and versioning contracts
Deletion, priority, and dependency checks
Tree deletion, rollback, and route checks
Offline connectivity, queue, snapshot, and recovery checks
Online routes, persistent roots, journals, and CAS checks
Pattern, spatial, and frequency index checks
Circular lists, traversal, bitsets, and rank checks
Sparse sums, quantiles, parity, and sequence edits
Bit rank, depot paths, and sorted-run contracts
Lazy ranges, ancestors, grids, and hash probes
Forest paths, online substrings, and text pieces
Cuckoo slots, spatial boxes, and bit trie paths
Range corrections, hash proofs, and median heaps
Block, threshold, disjoint, and line index contracts
Coordinate ranks, order selection, offline windows, and grid sums
Postings, positions, trigrams, and lexicon contracts
Eviction, expiry, handles, and heap contracts
Frequent items, distinct counts, and stream samples
Approximate membership under mutation
Priority-queue merge, monotonicity, and extremes
Spatial grids, quadtrees, boxes, and code ranges
Gap buffers, ropes, and blocked sequences
Compact integer sets, postings, and tries
Arenas, free spans, buddies, and slab slots
Hash tries, term trees, routes, and directories
CLOCK, segmented LRU, admission, and timer wheels
Splay trees and resident history eviction
Check search layouts, range roots, melds, and numeric constraints
Check spatial counts, bounded successors, rebuilds, and filter membership
Check streaming palindromes, range caps, quantiles, and window order
Check hash splits, spatial toggles, queue versions, and tree intervals
Check metric searches, marked depots, and static membership
Check text intervals, score bounds, rank models, and ancestor tours
Check predecessor, revision, substring, and coverage snapshots
Check graph overlays, path bits, labels, and heap ownership
Check heap repairs, run winners, spatial pruning, and rules
Check phrase codes, active intervals, prefix bits, and routes
Check ordered ranks, grid corrections, and majority windows
Check weighted draws, incident candidates, and alert spans
Check member moves, cut depots, bottlenecks, and set families
Check signed sketches, recent windows, and exact range modes
Check prefix, neighborhood, replica, and unitig contracts
Check adaptive nodes, bit slices, SimHash, and acyclic word states
Check range MEX, XOR spans, affine updates, and priority ends
Check persistent ranks, fault bursts, tariff offers, counts, and routes