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3 Month DSA Practice Sheet

Complete 90-day mastery program

27 Easy73 Medium21 Hard
0 of 121 solved0%

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Showing 121 of 121 problems

01Merge Sorted Arrayeasy
02Maximum Subarrayeasy
03Pascal's Triangleeasy
04Set Matrix Zeroesmedium
05Rotate Imagemedium
06Merge Intervalsmedium
07Next Permutationhard
08Count Inversionsmedium
09Search in Rotated Sorted Arraymedium
10Median of Two Sorted Arrayshard
11Two Sum II - Input Array Is Sortedeasy
12Sort Colorsmedium
13Trapping Rain Waterhard
14Maximum Subarrayeasy
15K Max Sum Combinationsmedium
16Delete Node in a Linked Listeasy
17Reverse Linked Listeasy
18Remove Linked List Elementseasy
19Middle of the Linked Listeasy
20Merge Two Sorted Listseasy
21Palindrome Linked Listeasy
22Remove Duplicates from Sorted List IImedium
23Add Two Numbersmedium
24Reverse Nodes in k-Grouphard
25Reorder Listmedium
26Rotate Listmedium
27Linked List Cyclemedium
28Flatten a Multilevel Doubly Linked Listmedium
29Valid Parentheseseasy
30Evaluate Reverse Polish Notationmedium
31Next Greater Element Imedium
32Rotting Orangesmedium
33Sliding Window Maximumhard
34Largest Rectangle in Histogramhard
35Two Sumeasy
363Summedium
37Longest Consecutive Sequencemedium
38Largest subarray with 0 summedium
39Longest Substring Without Repeating Charactersmedium
40Subarrays with XOR Khard
41Copy List with Random Pointermedium
42LRU Cachehard
43Rat in a Mazemedium
44Subsetsmedium
45Combination Summedium
46Combinationsmedium
47Generate Parenthesesmedium
48N-Queenshard
49Permutation Sequencehard
50Same Treeeasy
51Symmetric Treeeasy
52Maximum Depth of Binary Treeeasy
53Diameter of Binary Treeeasy
54Invert Binary Treeeasy
55Balanced Binary Treeeasy
56Binary Tree Zigzag Level Order Traversalmedium
57Construct Binary Tree from Preorder and Inorder Traversalmedium
58Binary Tree Left Side Viewmedium
59Top View of Binary Treemedium
60Lowest Common Ancestor of a Binary Treemedium
61Flatten Binary Tree to Linked Listmedium
62Populating Next Right Pointers in Each Nodemedium
63Binary Tree Maximum Path Sumhard
64Binary Tree to DLLhard
65Inorder Successor in BSTmedium
66Delete Node in a BSTmedium
67Lowest Common Ancestor of a BSTeasy
68Validate Binary Search Treemedium
69Kth Smallest Element in a BSTmedium
70Largest BSThard
71Find Median from Data Streamhard
72Merge k Sorted Listshard
73Excel Sheet Column Numbereasy
74Greatest Common Divisoreasy
75Count Primesmedium
76Unique Pathsmedium
77Power of Twoeasy
78Find Missing and Repeatingmedium
79Climbing Stairseasy
80Longest Increasing Subsequencemedium
81Longest Common Subsequencemedium
82Longest Palindromic Substringmedium
83Edit Distancemedium
84Dungeon Gamemedium
85Partition Equal Subset Summedium
86Minimum Path Summedium
87Rod Cuttingmedium
88Coin Changemedium
89Decode Waysmedium
90Unique Pathsmedium
91Maximum Product Subarraymedium
92Super Egg Drophard
93Palindrome Partitioningmedium
94Word Breakmedium
95Best Time to Buy and Sell Stock IIIhard
96Regular Expression Matchinghard
97Meeting Rooms IImedium
98Fractional Knapsackmedium
99Job Sequencing Problemmedium
100Minimum Platformsmedium
101DFS of Graphmedium
102BFS of Graphmedium
103Detect Cycle in Directed Graphmedium
104Detect Cycle in Undirected Graphmedium
105Course Schedulemedium
106Find if Path Exists in Graphmedium
107Number of Islandsmedium
108Valid Pathmedium
109Surrounded Regionsmedium
110Word Searchmedium
111Stepping Numbersmedium
112M-Coloring Problemmedium
113Word Ladderhard
114Longest Palindromemedium
115Roman to Integereasy
116Implement strStreasy
117Longest Common Prefixeasy
118Count and Saymedium
119Compare Version Numbersmedium
120Shortest Unique Prefixhard
121Search Suggestions Systemhard