Stack
See all coding puzzles and patterns here.
Data Structure Description
A stack is a last-in first-out (LIFO) data structure that is used for various DSA (data structures & algorithms) problems.
For example, a stack is typically used to implement a depth-first search.
Puzzles
| Puzzle | Difficulty | External Link |
| Basic Calculator I | Hard | Leetcode 224 |
| Basic Calculator II | Medium | Leetcode 227 |
| Bracket Balance | Medium | |
| Daily Temperatures | Medium | Leetcode 739 |
| Decode a String | Medium | |
| Decrypt a String | Easy |
Problems in DFS are also generally solved using stacks.
