Medium · Math

Basic Calculator II

Given a string s holding a valid expression of non-negative integers, '+', '-', '*', '/' and spaces (no parentheses), return its value; integer division truncates toward zero.

Examples

Example 1

{
  "s": "3+2*2"
}

Output: = 7

Example 2

{
  "s": " 3/2 "
}

Output: = 1

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