Evaluate arithmetic expression
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.
Implement
basic_calculator(s: str) → intExamples
in
["3+2*2"]out7What a strong answer looks like
State 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.
0:00 of about 30 min
solution.py
InputExpectedGot
["3+2*2"]7not run yetsample