[ OK ]1e1f11a8-d3cf-443b-a100-7e01630758ab — full content available
[ INFO ]category: Coding difficulty: unknown freq: first seen: 2026-03-13
[UNKNOWN][CODING]
$catproblem.md
The "Closest Cake and Global Assignment" problem is a multi-part coding challenge that has been reported in technical interviews at companies like Snowflake. While some candidates have recently associated it with xAI's rigorous technical assessments, it is primarily known as a two-task algorithmic problem involving array manipulation and optimization. 041
Problem Overview
You are typically given a 1D array representing a street or a sequence of locations. 04
Task 1: Nearest Cake Distance (Closest Cake)
Input: An array where certain indices contain "cakes" (targets) and others contain "people" or are empty.
Goal: For every position in the array, find the distance to the nearest cake.
Standard Approach: This is often solved using a two-pass algorithm (left-to-right and right-to-left) to compute the minimum distance to a target in 𝑂(𝑛) time.
Task 2: Global Matching (Global Assignment)
Input: A set of people and a set of cakes at various positions.
Goal: Assign each person to a cake such that the total distance (or sometimes the maximum individual distance) is minimized.
Constraint: Usually, each cake can only be assigned to one person (a 1-to-1 matching).
Standard Approach: This often evolves into a Greedy approach if the relative order must be preserved, or a Min-Cost Max-Flow / Hungarian Algorithm problem if it is a general optimal assignment challenge.
Relevance to xAI
xAI interviews are known to be fast-paced and lean toward practical, real-world tasks rather than standard "LeetCode" puzzles. Candidates have described their assessments as: Reddit +1 52
Highly Complex: Involving multiple tasks that build on each other within a limited timeframe.
System-Oriented: Moving from a basic function to handling "millions of queries" or discussing scalability.