Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1171 | Find Unique Binary String | Medium | ArrayHash TableString |
| 1172 | Find Users With Valid E-Mails | Easy | Database |
| 1173 | Find Valid Emails | Easy | Database |
| 1174 | Find Valid Matrix Given Row and Column Sums | Medium | ArrayGreedyMatrix |
| 1175 | Find Valid Pair of Adjacent Digits in String | Easy | Hash TableStringCounting |
| 1176 | Find Weighted Median Node in Tree | Hard | ArrayBinary SearchDynamic Programming |
| 1177 | Find Winner on a Tic Tac Toe Game | Easy | ArrayHash TableMatrix |
| 1178 | Find Words Containing Character | Easy | ArrayString |
| 1179 | Find Words That Can Be Formed by Characters | Easy | ArrayHash TableString |
| 1180 | Find X-Sum of All K-Long Subarrays I | Easy | ArrayHash TableSliding Window |
| 1181 | Find X-Sum of All K-Long Subarrays II | Hard | ArrayHash TableSliding Window |
| 1182 | Find X Value of Array I | Medium | ArrayMathDynamic Programming |
| 1183 | Find X Value of Array II | Hard | ArrayMathSegment Tree |
| 1184 | Find Xor-Beauty of Array | Medium | ArrayMathBit Manipulation |
| 1185 | Find XOR Sum of All Pairs Bitwise AND | Hard | ArrayMathBit Manipulation |
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