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Quick Summary
Navigate a grid of digits and operators moving only right or down.
Construct alternating digit-operator paths that start and end with digits.
Find the maximum left-to-right evaluated result across all valid paths.
What This Tests
Grid-based dynamic programming
Memoization with multi-state tracking
Handling non-monotonic operations like subtraction
Constraint validation during traversal
Common Patterns
Dynamic Programming
DFS/BFS
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Python3
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Input
matrix =
Output
Expected
