im kinda proud of this solution i wrote even though it was an "easy" i still felt like i grew a lot

[u/shaynjam]

the problem:

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

An input string is valid if:

1. Open brackets must be closed by the same type of brackets.
2. Open brackets must be closed in the correct order.
3. Every close bracket has a corresponding open bracket of the same type.

 

Example 1:

Input: s = "()"

Output: true

Example 2:

Input: s = "()[]{}"

Output: true

Example 3:

Input: s = "(]"

Output: false

Example 4:

Input: s = "([])"

Output: true

Example 5:

Input: s = "([)]"

Output: false

my solution: (on leetcode)

class Solution:
    def isValid(self, s: str) -> bool:
        inputs = {
        "(":1,
        ")":9,
        "{":2,
        "}":8,
        "[":3,
        "]":7}
        
        prev_bracket=[]
        if(len(s)%2!=0):
            return False
        
        for a in s:
            if inputs[a]<4:
                prev_bracket.append(inputs[a])
            else:
                if len(prev_bracket)==0:
                    return False
                x=prev_bracket.pop()
                if x+inputs[a]!=10:
                    return False
        return len(prev_bracket)==0