mediumleetcodejavascript
Soruyu Platformda GörValid Parentheses
Valid Parentheses
Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
An input string is valid if:
Open brackets must be closed by the same type of brackets.
Open brackets must be closed in the correct order.
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
Constraints:
1 <= s.length <= 104
s consists of parentheses only '()[]{}'.
Time complexity: O(n)
Space complexity: O(n)
Çözüm (javascript)
solution.js
var isValid = function(s) {
const stack = [];
for (const c of s) {
if (c === '(')
stack.push(')');
else if (c === '{')
stack.push('}');
else if (c === '[')
stack.push(']');
else if (stack.length === 0 || stack.pop() !== c)
return false;
}
return stack.length === 0;
};