List of problems I have solved so far
Easy
| Question | Solution | Date | Comment |
|---|---|---|---|
| 20. Valid Parentheses | |||
| 155. Min Stack | |||
| 225. Implement Stack using Queues | |||
| 232. Implement Queue using Stacks |
Medium
| Question | Solution | Date | Comment |
|---|---|---|---|
| 739. Daily Temperatures | |||
| 856. Score of Parentheses | |||
| 946. Validate Stack Sequences |
Hard
| Question | Solution | Date | Comment |
|---|---|---|---|
| 42. Trapping Rain Water | |||
| 726. Number of Atoms | |||
| 895. Maximum Frequency Stack |
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