Nested Calculator Problem

Nested Calculator Problem — ExecCode Hard DSA Practice

Solve the Nested Calculator problem on ExecCode. Free online hard DSA practice in Stacks & Queues. Write and run code in Java, C++, Python — no signup required to run.

Problem description

Evaluate an expression with integers, '+', '-', '*', '/', and parentheses. Division truncates toward zero (C++ style). Spaces are allowed. This is Basic Calculator III — a common Jane Street / Google OA hard parser. Return the integer value of the expression. You are given: s — expression string Return integer. Do not use eval.

Examples

Input {'s': '2(5+52)/3+(6/2+8)'}; Output 21. Input {'s': '(2+63+5-(314/7)+2)/7'}; Output 3. Input {'s': '1+1'}; Output 2

Constraints

Operator precedence: * / before + Parentheses override precedence No unary operators except as part of integer tokens after an operator

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