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DoorDash
Coding Question
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Quick Summary
Identify 4-directionally connected groups of customers in a grid.
Verify that every customer in a group has a driver available at the exact same coordinate.
Count the total number of groups that meet the full coverage requirement.
What This Tests
Grid-based graph traversal
Connected component discovery
Visited state tracking
Conditional flag management during iteration
Common Patterns
Graph Traversal
DFS/BFS
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