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 NADOS (PepCoding) Level 1 Q's in Leetcode
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TOPICS Level 1
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Leetcode Questions Links
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approx 150 questions
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Function & Array
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1Find Element In An Array
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2Sum Of Two Arrays
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3Reverse a array
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4Rotate an Array
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5Subarray Problemhttps://leetcode.com/problems/maximum-subarray/
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6Subsets of an Arrayhttps://leetcode.com/problems/subsets/
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7First Index and Last Indexhttps://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/
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2-D Arrays
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1Matrix Multiplication
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2Spiral Matrixhttps://leetcode.com/problems/spiral-matrix/
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3Exit of point of matrixhttps://leetcode.com/problems/01-matrix/
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4Rotate By 90 Degreehttps://leetcode.com/problems/rotate-image/
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5Search in 2D Matrixhttps://leetcode.com/problems/search-a-2d-matrix/
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https://leetcode.com/problems/search-a-2d-matrix-ii/
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6Ring rotate
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String, Dynamic String and Dynamic Array
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1Palindromic SubStringshttps://leetcode.com/problems/palindromic-substrings/
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2Toggle Optica Documenthttps://leetcode.com/problems/to-lower-case/
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3String With Difference Of Every Two Consecutive Charactershttps://leetcode.com/problems/consecutive-characters/
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4Permutation of Strings
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Recursion And Backtracking
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1Factorial
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2Power-linearhttps://leetcode.com/problems/power-of-two/
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3Tower Of Hanoi
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4First Index , Last Indexhttps://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/
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5All Indices Of Arrayhttps://leetcode.com/problems/find-all-k-distant-indices-in-an-array/
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6Get Subsequencehttps://leetcode.com/problems/is-subsequence/
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7get kpchttps://leetcode.com/problems/letter-combinations-of-a-phone-number
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8Get Stair Pathshttps://leetcode.com/problems/climbing-stairs/
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9Get Maze Pathshttps://leetcode.com/problems/unique-paths/
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10Get Maze Path With Jumpshttps://leetcode.com/problems/jump-game/
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11Print Permutationshttps://leetcode.com/problems/permutations/
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12Flood Fillhttps://leetcode.com/problems/flood-fill/
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13Target Sum subsethttps://leetcode.com/problems/target-sum/
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14N Queenhttps://leetcode.com/problems/n-queens/
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15Kinght Tourhttps://leetcode.com/problems/knight-probability-in-chessboard/
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Time and Space Complexity
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1Bubble Sort
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2Selection Sort
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3Insertion Sort
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4Merge two sorted arrayhttps://leetcode.com/problems/merge-sorted-array/
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5Merge Sort
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6Partition An Array
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7Quick Sort
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8Quick Select https://leetcode.com/tag/quickselect/
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9Count Sorthttps://leetcode.com/tag/counting-sort/
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10Radix Sorthttps://leetcode.com/tag/radix-sort/
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11Sort 0 & 1
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12Sort 0 & 1 & 2https://leetcode.com/problems/sort-colors/
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13Target Sum Pair 1
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14Pivot In Sorted And Rotated Arrayhttps://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
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Stacks And Queues
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1Duplicate Bracketshttps://leetcode.com/problems/valid-parentheses/
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2Balanced Bracketshttps://practice.geeksforgeeks.org/problems/valid-expression1025/1/
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3Next Greater element to the righthttps://leetcode.com/problems/next-greater-element-i/
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https://leetcode.com/problems/next-greater-element-ii/
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https://leetcode.com/problems/next-greater-element-iii/
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4Stock Spanhttps://leetcode.com/problems/online-stock-span/
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5Largest Area Histogramhttps://leetcode.com/problems/largest-rectangle-in-histogram//
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6Sliding Window Maximumhttps://leetcode.com/problems/sliding-window-maximum/
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7Infix Conversionhttps://leetcode.com/problems/basic-calculator/
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https://leetcode.com/problems/basic-calculator-ii/
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8Celebrity Problem
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9Merge Overlapping Intervalhttps://leetcode.com/problems/merge-intervals/
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10Smallest Number Following Patternhttps://leetcode.com/problems/132-pattern/solution/
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12Dynamic Stack
https://leetcode.com/problems/build-an-array-with-stack-operations/
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13Minimum Stackhttps://leetcode.com/problems/min-stack/
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14Minimum Stack - Constant time and space
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15Normal Queuehttps://leetcode.com/problems/implement-queue-using-stacks/
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16Two stacks in an array
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LinkedList
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1Display A Linkedlisthttps://leetcode.com/problems/design-linked-list/
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2Reverse a linked List - Interatively
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3Reverse a linked List - Recursive
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4Kth Node from End of the linked list
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5Mid Of Linked Listhttps://leetcode.com/problems/middle-of-the-linked-list/
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6Merge two sorted linked listhttps://leetcode.com/problems/merge-two-sorted-lists/
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7Merge Sort A Linked Listhttps://leetcode.com/problems/sort-list/
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8Remove Duplicates In A Sorted Linked Listhttps://leetcode.com/problems/remove-duplicates-from-sorted-list/
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9Odd Even Linked Listhttps://leetcode.com/problems/odd-even-linked-list/
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10K Reverse In Linked Listhttps://leetcode.com/problems/reverse-nodes-in-k-group/
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11Is linked list is a Palindromehttps://leetcode.com/problems/palindrome-linked-list/
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12Fold A Linked Listhttps://leetcode.com/problems/reorder-list/
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13Add Two Linked Listshttps://leetcode.com/problems/add-two-numbers/
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14Intersection Point Of Linked Listshttps://leetcode.com/problems/intersection-of-two-linked-lists/
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Generic Tree
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1Generic Tree Traversals - Pre,In and Post
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2Levelorder Linewise (generic Tree)https://leetcode.com/problems/n-ary-tree-level-order-traversal/
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3Levelorder Linewise Zig Zaghttps://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/
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4Mirror A Generic Treehttps://leetcode.com/problems/symmetric-tree/
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5Remove Leaves In Generic Treehttps://leetcode.com/problems/delete-leaves-with-a-given-value/