How should I practice Basic Calculator with Multiplication and Parentheses?

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

Is Basic Calculator with Multiplication and Parentheses associated with Bloomberg LP?

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

Basic Calculator with Multiplication and Parentheses

Bloomberg LP● HardNEW GRADPHONE SCREEN

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Problem statement

Evaluate a valid arithmetic expression containing nonnegative decimal integers, binary +, -, and *, parentheses, and optional spaces.

Multiplication has higher precedence than addition and subtraction. Parentheses override precedence. Return the integer result.

Function

calculate(expression: String) → int

Examples

Example 1

expression = "2*(3+4)-5"return = 9

The parenthesized sum is seven, multiplication gives fourteen, and subtracting five gives nine.

Example 2

expression = "12 + 3 * (4 - 2)"return = 18

The multiplication contributes six before the outer addition.

Constraints

1 <= expression.length <= 10^5.
The expression is valid and contains only digits, spaces, +, -, *, (, and ).
Every operator is binary; unary signs are absent.
All intermediate values fit in a signed 32-bit integer.