How should I practice Calculator with Parentheses?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Google phone screen problems in FastPrep.

Is Calculator with Parentheses associated with Google?

FastPrep tags this as a Google phone screen coding practice problem when the problem catalog has that company and stage context.

Calculator with Parentheses

Google● MediumNEW GRADPHONE SCREEN

Problem statement

Evaluate a valid integer expression containing non-negative decimal integers, ASCII spaces, binary + and -, unary + and -, and balanced parentheses.

The problem statement continues

Pro

Examples

Example 1

expression = "1 + (2 - 3) + 4"return = 4

The parenthesized subexpression evaluates to -1.

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