代码题库

Array Product Except Self

Canonical Ticker-Symbol Form — Cross-Venue Dedup

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

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

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

Fill Attribution by Parent Order ID

Find the Pivot Index of a P&L Stream

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

First Unique Character

Longest Palindromic Substring

Longest Substring Without Repeating Characters

Robust Cross-Sectional Z-Score via Median and MAD

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

2D Range Sum via Prefix Table

Resample Tick Prints into Fixed-Interval OHLC Bars

Roman Numeral to Integer

Reverse Words in a Sentence

Valid Palindrome (Alphanumeric, Case-Insensitive)

Top K Liquid Tickers

Two Sum

Unique Tickers In Session

Valid Anagram (Character Counts)