#63Hard#26 in Meta's list· asked at 13 companies
Basic Calculator
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What we know
Example 1
Input: s = "1 + 1" Output: 2
Example 2
Input: s = " 2-1 + 2 " Output: 3
Example 3
Input: s = "(1+(4+5+2)-3)+(6+8)" Output: 23
Constraints
- •
1 <= s.length <= 3 * 10^5 - •
sconsists of digits, '+', '-', '(', ')', and ' '. - •
srepresents a valid expression.