代码题库

Trade-Size Tier Histogram via Right-Inclusive Edges

Bucket-Sort P&L Histogram

Canonical Ticker-Symbol Form — Cross-Venue Dedup

Count K-Tick Windows With Every Quote Inside the Tolerance Band

Count of Strictly-Positive Net-Inflow K-Period Windows

Counterparty Activity Shift: Largest Trade-Count Differential Across Two Sessions

Counterparty Gross-Notional Aggregator: Magnitude-Sorted Roll-Up

Days Until a Better PnL

Counterparty Rotation Indicator: Day-Over-Day Symmetric-Difference Series

Per-Side Dense-Rank Annotation for the Day's Blotter

Fill Attribution by Parent Order ID

Find Third Largest Distinct

Fills-Audit Frequency Probe: First Order-ID Whose Lifecycle Hits Exactly k FIX Events

First Unique Character

Largest Divisible Pair (Sort + Scan)

Longest Palindromic Substring

Longest Substring Without Repeating Characters

Merge Overlapping Quote-Validity Windows

Merge Two Sorted Lists — Iterative Two-Pointer

Min-Stack with O(1) get_min

Order-Event Footprint: Most-Frequent Consecutive Event-Pair

Next Greater Quote Timestamp

Next Smaller Element Index

Peak Inventory Day After Batched Range-Update Trades

Rank Records by Multi-Key Tie-Break Rule

Roman Numeral to Integer

Running Cumulative Sum over a Stream

Stream Running Distinct Count

Streaming K-th Largest P&L

Reverse Words in a Sentence

Valid Palindrome (Alphanumeric, Case-Insensitive)

Valid Anagram (Character Counts)