Question
Evaluate a basic arithmetic expression string containing non-negative integers and the binary operators +, -, *, / separated by the operators (and possibly spaces). There are no parentheses. * and / have higher precedence than + and -, and integer division truncates toward zero (so 14 - 3/2 = 14 - 1 = 13). You may assume the expression is valid and the result fits in a signed 32-bit integer. Return the integer value.
basic_calculator(s: str) → int["3+2*2"]out7State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.