代码题库

Quote Engine Active Set: Peak Concurrently-Live Quotes

Array Product Except Self

Canonical Ticker-Symbol Form — Cross-Venue Dedup

Pre-Aggregation Bucket Labels: Canonical-Form Group IDs for Multi-Venue Symbols

Card Shuffle Bias Detection

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

Open-Order Dashboard Tile: Distinct Symbols Currently In Play

Fill Attribution by Parent Order ID

Find the Pivot Index of a P&L Stream

First Duplicate Order ID

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

First Unique Character

FIX-Style Trailing Checksum Verify: Trinary Label Per Pipe-Delimited Message

FIX-Style Tag Extract: First Value for a Numeric Tag in a Pipe-Delimited Message

Longest Consecutive Sequence (Hash Set)

Longest Palindromic Substring

Longest Substring Without Repeating Characters

Minimum Window Substring

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

Tape-Anomaly Detector: Most-Repeated Trade Fingerprint

End-of-Day Net Positions from a Raw Trade Tape

Notional by Venue, Ranked

Router Reliability Check: Count Orphan Cancellations

Position Fingerprint Grouping

2D Range Sum via Prefix Table

Roman Numeral to Integer

Counterparty Diversity Diagnostic: Running Distinct Counterparty Count

Per-Strategy P&L Bookkeeping with Mark-to-Market

Reverse Words in a Sentence

Valid Palindrome (Alphanumeric, Case-Insensitive)

Subarray Sum Equals K

Top K Liquid Tickers

Two Sum

Unique Tickers In Session

Valid Anagram (Character Counts)