roma-dxunvrs
21 lines
596 B
Markdown
21 lines
596 B
Markdown
Leetcode #20 | #Easy | [[Стек]] | [[Хэш-таблицы]]
|
|
## Идея
|
|
Стек
|
|
## Big-O
|
|
- Время ```O(N)```
|
|
- Память ```O(N)```
|
|
## Код
|
|
```Java
|
|
class Solution {
|
|
public boolean isValid(String s) {
|
|
Map<Character, Character> map = Map.of(')', '(', ']', '[', '}', '{');
|
|
Deque<Character> stack = new ArrayDeque<>();
|
|
for (char c : s.toCharArray()) {
|
|
if (map.containsKey(c)) {
|
|
if (stack.isEmpty() || stack.pop() != map.get(c)) return false;
|
|
} else stack.push(c);
|
|
}
|
|
return stack.isEmpty();
|
|
}
|
|
}
|
|
``` |