| 0020 |
Valid Parentheses |
Java |
O(n) |
- |
O(n) |
Easy |
Stack |
| 0071 |
Simplify Path |
Java |
- |
- |
- |
Easy |
Stack |
| 0150 |
Evaluate Reverse Polish Notation |
Java |
O(n) |
- |
O(n) |
Medium |
Stack |
| 0155 |
Min Stack |
Java |
O(n) |
- |
O(n) |
Easy |
Stack |
| 0225 |
Implement Stack using Queues |
Java |
- |
- |
- |
Easy |
Stack |
| 0232 |
Implement Queue using Stacks |
Java |
- |
- |
- |
Easy |
Stack |
| 0331 |
Verify Preorder Serialization of a Binary Tree |
Java |
- |
- |
- |
Medium |
Stack |
| 0341 |
Flatten Nested List Iterator |
Java |
- |
- |
- |
Medium |
Stack |
| 0385 |
Mini Parser |
Java |
- |
- |
- |
Medium |
Stack |
| 0394 |
Decode String |
Java |
- |
- |
- |
Medium |
Stack |
| 0456 |
132 Pattern |
Java |
- |
- |
- |
Medium |
Stack |
| 0496 |
Next Greater Element I |
Java |
- |
- |
- |
Easy |
Stack |
| 0503 |
Next Greater Element II |
Java |
- |
- |
- |
Medium |
Stack |