#227

Basic Calculator II

specialist · 930 · lc medium +32 · verified · 46.7% accepted · 6,590 likes · top 31%

Description

A string s encodes an arithmetic expression. Evaluate it and return the integer result. Integer division must truncate toward zero.

The expression is always valid, and all intermediate values fit in [-2³¹, 2³¹ - 1].

Note: You may not use any built-in function that evaluates strings as code (e.g., eval()).

Example 1:

Input: s = "3+2*2"

Output: 7

Example 2:

Input: s = " 3/2 "

Output: 1

Example 3:

Input: s = " 3+5 / 2 "

Output: 5

Code

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class Solution:
    def calculate(self, s: str) -> int:

class Solution:
    def calculate(self, s: str) -> int: