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DIY: Basic Calculator II

Explore how to implement a basic calculator in Kotlin that evaluates mathematical expressions containing integers and operators without using built-in evaluation functions. Learn to handle operator precedence and integer division rules to solve real coding interview problems.

Problem statement

In this challenge, you are given a string, st, which contains an expression. You’ll evaluate this expression and return its value. Keep the following statements in mind while solving the problem:

  • The integer division should be rounded off to the nearest smallest integer.
  • The given expression is always valid, giving the intermediate result in the range of [[-2312^{31}
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