Clear the Grid: Sum to 15
Implement the Fifteen Sum Card Grid game
Overview
Implement a card grid game where you repeatedly find and remove triples of cards that sum to 15.
Given a rectangular grid of integers, find three distinct cells whose values sum to 15, remove them, redeal the remaining cards into the grid (row-major order), and repeat until no valid moves remain.
Rules
- A move selects 3 distinct cells whose values sum to 15.
- When multiple valid triples exist, pick the one whose sorted coordinate list is lexicographically smallest.
- After removing 3 cards, redeal the remaining cards row-major into the grid.
- Stop when no valid move exists.
- Raise
ValueErrorfor invalid input: empty grid, empty rows, ragged grid, or non-integer values.
Scoring
Each test case is worth equal points. Final score is the percentage of passing tests.
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