problem0241

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Published: Sep 11, 2020 License: MIT Imports: 1 Imported by: 0

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241. Different Ways to Add Parentheses

题目

Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. The valid operators are +, - and *.

Example 1

Input: "2-1-1". 
((2-1)-1) = 0
(2-(1-1)) = 2

Output: [0, 2]

Example 2

Input: "2*3-4*5" 
(2*(3-(4*5))) = -34
((2*3)-(4*5)) = -14
((2*(3-4))*5) = -10
(2*((3-4)*5)) = -10
(((2*3)-4)*5) = 10

Output: [-34, -14, -10, -10, 10]

Credits:Special thanks to @mithmatt for adding this problem and creating all test cases.

解题思路

见程序注释

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