Basic calculator
Implement a basic calculator that evaluates a string expression. The expression contains non-negative integers, '+', '-', '(' , ')', and spaces. Unary minus does not occur (every '-' is binary). Return the integer result. 1 <= len(s) <= 3*10^5 and the expression is always valid; the result fits in a signed 32-bit-safe range for these tests.
Implement
basic_calculator(s: str) → intExamples
in
["(1+(4+5+2)-3)+(6+8)"]out23What 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
["(1+(4+5+2)-3)+(6+8)"]23not run yetsample