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DoorDash
Coding Question
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Quick Summary
Find the minimum travel distance from multiple query coordinates to the nearest target cell in a grid.
Movement is restricted to four directions across open roads while avoiding blocked cells.
Return an ordered list of distances, using -1 for unreachable or blocked starting points.
What This Tests
Graph traversal on a 2D grid
Multi-source search initialization
Queue-based level-order processing
Early termination optimization
Common Patterns
BFS
Graph Traversal
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Input
city =
locations =
Output
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