Learning
| ID | Problem | Difficulty | Section | Sheets |
|---|---|---|---|---|
| 390 | Implement Stack using Arrays | Easy | Learning | A2Z SDE |
| 387 | Implement Queue using Arrays | Easy | Learning | A2Z SDE |
| 392 | Implement Stack using Queue | Easy | Learning | A2Z |
| 389 | Implement Queue using Stack | Easy | Learning | A2Z SDE |
| 391 | Implement stack using Linkedlist | Easy | Learning | A2Z |
| 388 | Implement queue using Linkedlist | Easy | Learning | A2Z |
| 966 | Balanced Paranthesis | Easy | Learning | A2Z SDE B75 |
| 958 | Implement Min Stack | Hard | Learning | A2Z SDE |
| 2808 | Implement Stack using Queue (using single queue) | Easy | Learning | SDE |
| 936 | Sort a Stack | Medium | Learning | SDE |
Prefix, Infix, PostFix Conversion Problems
| ID | Problem | Difficulty | Section | Sheets |
|---|---|---|---|---|
| 586 | Infix to Postfix Conversion | Medium | Prefix, Infix, PostFix Conversion Problems | A2Z |
| 848 | Prefix to Infix Conversion | Medium | Prefix, Infix, PostFix Conversion Problems | A2Z |
| 849 | Prefix to Postfix Conversion | Medium | Prefix, Infix, PostFix Conversion Problems | A2Z |
| 825 | Postfix to Prefix Conversion | Medium | Prefix, Infix, PostFix Conversion Problems | A2Z |
| 824 | Postfix to Infix Conversion | Easy | Prefix, Infix, PostFix Conversion Problems | A2Z |
| 587 | Infix to Prefix Conversion | Medium | Prefix, Infix, PostFix Conversion Problems | A2Z |
Monotonic Stack/Queue Problems [VVV. Imp]
| ID | Problem | Difficulty | Section | Sheets |
|---|---|---|---|---|
| 968 | Next Greater Element | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z SDE |
| 969 | Next Greater Element - 2 | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 768 | Next Smaller Element | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z SDE |
| 285 | Number of Greater Elements to the Right | Easy | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 965 | Trapping Rainwater | Hard | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z SDE |
| 971 | Sum of Subarray Minimums | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 967 | Asteroid Collision | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 972 | Sum of Subarray Ranges | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 970 | Remove K Digits | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 959 | Largest rectangle in a histogram | Hard | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z SDE |
| 962 | Maximum Rectangles | Hard | Monotonic Stack/Queue Problems [VVV. Imp] | A2Z |
| 687 | Maximum of Minimums for Every Window Size | Medium | Monotonic Stack/Queue Problems [VVV. Imp] | SDE |
Implementation Problems
| ID | Problem | Difficulty | Section | Sheets |
|---|---|---|---|---|
| 963 | Sliding Window Maximum | Hard | Implementation Problems | A2Z SDE |
| 964 | Stock span problem | Hard | Implementation Problems | A2Z SDE |
| 957 | Celebrity Problem | Hard | Implementation Problems | A2Z SDE |
| 961 | LRU Cache | Medium | Implementation Problems | A2Z SDE |
| 960 | LFU Cache | Hard | Implementation Problems | A2Z SDE |