| Find Smallest Common Element in All Rows | Medium | amazon
microsoft | |
| Minimum Time to Build Blocks | Hard | google | |
| Number of Days in a Month | Easy | amazon | |
| Optimize Water Distribution in a Village | Hard | google
yahoo | |
| Remove Vowels from a String | Easy | amazon | |
| Single-Row Keyboard | Easy | google | |
| String Transforms Into Another String | Hard | amazon
google | |
| The Earliest Moment When Everyone Become Friends | Medium | expedia | |
| All Paths from Source Lead to Destination | Medium | amazon
google | |
| Campus Bikes | Medium | amazon
bytedance
facebook
google | |
| Confusing Number | Easy | google | |
| Digit Count in Range | Hard | amazon | |
| Find fixed point in sorted array | Easy | uber
apple
amazon | |
| Find K-Length Substrings With No Repeated Characters | Medium | amazon | |
| Index Pairs of a String | Easy | amazon | |
| Missing Element in Sorted Array | Medium | amazon
apple
bloomberg
facebook
google
lyft | |
| Shortest Distance After Road Addition Queries I | Medium | | |
| Similar RGB Color | Easy | google | |
| Split BST | Medium | amazon
coupang
facebook
google | |
| Pour Water | Medium | airbnb
robinhood | |
| IP to CIDR | Medium | airbnb | |
| Candy Crush | Medium | bloomberg
facebook
google
rubrik
twitch | |
| Number of Distinct Islands II | Hard | amazon | |
| Search in a Sorted Array of Unknown Size | Medium | amazon
ebay
google
microsoft | |
| K Empty Slots | Hard | amazon
google
microsoft | |
| Path Sum IV | Medium | alibaba | |
| Remove 9 | Hard | google
houzz | |
| Minimum Factorization | Medium | tencent | |
| Design Compressed String Iterator | Easy | amazon
google | |
| Design In-Memory File System | Hard | airbnb
amazon
baidu
goldman-sachs | |
| Kill Process | Medium | amazon
apple
bloomberg
google | |
| Squirrel Simulation | Medium | square | |
| Longest Line of Consecutive One in Matrix | Medium | google | |
| Binary Tree Longest Consecutive Sequence II | Medium | amazon
apple
facebook
google | |
| Construct Binary Tree from String | Medium | amazon
facebook | |
| Lonely Pixel I | Medium | google | |
| Find Permutation | Medium | google | |
| Smallest Good Base Problem | Hard | google | |
| Binary Tree Path Sum - Find all paths between any two nodes | Medium | | |
| Binary Tree Path Sum - Maximum between any two leaves | Medium | | |
| Binary Tree Path Sum - Maximum Sum Leaf to Root path | Medium | | |
| Binary Tree Path Sum - Maximum Sum Root to Leaf path | Medium | | |
| Binary Tree Path Sum - Minimum Sum Root to Leaf path | Easy | apple | |
| Brick Wall | Medium | adobe
bloomberg
facebook
google
oracle | |
| Check if Tree is Full Binary Tree | Medium | | |
| Check if two binary trees are mirror images of each other | Medium | | |
| Check if two nodes in a binary tree are siblings | Medium | | |
| Closest leaf to root in a binary tree | Medium | | |
| Consecutive Numbers Sum | Hard | citadel
citrix
indeed
roblox
uber
visa
vmware | |
| Construct ancestor matrix from a binary tree | Medium | | |