Platform Engineer signal: greedy proof + sorting in a sandbox allocator context. This is a ProdMatch-owned platform engineer drill, framed as a March 2026 PhonePe Runtime Platform simulation, not a copied platform question.
Company context
PhonePe · Runtime Platform
Freshness
March 2026
Product surface
sandbox allocator
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
Rebalance sessions across shards for sandbox allocator. Each move has a cost equal to distance between shards. Compute minimum cost to make shard loads differ by at most one.
Input
Output
Constraints
Concepts
loads [0,3,0] -> move one unit left and one right, cost=2
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