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Quick Summary

Evaluate a nested JSON expression tree containing constants and binary arithmetic operators.
Process leaf nodes directly and recursively combine results for operator nodes.
Strictly truncate division results toward zero as specified by the constraints.

What This Tests

Recursive tree traversal and base case identification
Navigating and casting heterogeneous data structures
Correct implementation of arithmetic edge cases

Common Patterns

DFS/BFS

Divide and Conquer

Stdout

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