Index Of Problems

Click below to expand and view problems.

Arrays

• https://leetcode.com/problems/two-sum/ Easy
• https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/ Easy
• https://leetcode.com/problems/build-array-from-permutation/ Easy
• https://leetcode.com/problems/concatenation-of-array/ Easy
• https://leetcode.com/problems/running-sum-of-1d-array/ Easy
• https://leetcode.com/problems/richest-customer-wealth/ Easy
• https://leetcode.com/problems/shuffle-the-array/ Easy
• https://leetcode.com/problems/number-of-good-pairs/ Easy
• https://leetcode.com/problems/how-many-numbers-are-smaller-than-the-current-number/ Easy
• https://leetcode.com/problems/create-target-array-in-the-given-order/ Easy
• https://leetcode.com/problems/check-if-the-sentence-is-pangram/ Easy
• https://leetcode.com/problems/count-items-matching-a-rule/ Easy
• https://leetcode.com/problems/find-the-highest-altitude/ Easy
• https://leetcode.com/problems/flipping-an-image/ Easy
• https://leetcode.com/problems/find-first-palindromic-string-in-the-array/ Easy
• https://leetcode.com/problems/matrix-diagonal-sum/ Easy
• https://leetcode.com/problems/maximum-subarray/ Easy
• https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/ Easy
• https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/ Easy
• https://leetcode.com/problems/transpose-matrix/ Easy
• https://leetcode.com/problems/find-numbers-with-even-number-of-digits/ Easy
• https://leetcode.com/problems/add-to-array-form-of-integer/ Easy
• https://leetcode.com/problems/maximum-population-year/ Easy
• https://leetcode.com/problems/find-n-unique-integers-sum-up-to-zero/ Easy
• https://leetcode.com/problems/determine-whether-matrix-can-be-obtained-by-rotation/ Easy
• https://leetcode.com/problems/cells-with-odd-values-in-a-matrix/ Easy
• https://leetcode.com/problems/matrix-diagonal-sum/ Easy
• https://leetcode.com/problems/plus-one/ Easy
• https://leetcode.com/problems/lucky-numbers-in-a-matrix/ Easy
• https://leetcode.com/problems/reshape-the-matrix/ Easy
• https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Easy
• https://leetcode.com/problems/spiral-matrix/ Medium
• https://leetcode.com/problems/spiral-matrix-ii/ Medium
• https://leetcode.com/problems/spiral-matrix-iii/ Medium Recommended
• https://leetcode.com/problems/set-matrix-zeroes/ Medium
• https://leetcode.com/problems/product-of-array-except-self/ Medium
• https://leetcode.com/problems/number-of-smooth-descent-periods-of-a-stock/ Medium
• https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/ Medium
• https://leetcode.com/problems/jump-game/ Medium
• https://leetcode.com/problems/rotate-array/ Medium
• https://leetcode.com/problems/sort-colors/ Medium
• https://leetcode.com/problems/house-robber/ Medium
• https://leetcode.com/problems/check-if-every-row-and-column-contains-all-numbers/ Easy
• https://leetcode.com/problems/minimum-swaps-to-group-all-1s-together-ii/ Medium
• https://leetcode.com/problems/maximize-distance-to-closest-person/ Medium
• https://leetcode.com/problems/find-all-lonely-numbers-in-the-array/ Medium
• https://leetcode.com/problems/rearrange-array-elements-by-sign/ Medium
• https://leetcode.com/problems/count-elements-with-strictly-smaller-and-greater-elements/ Easy
• https://leetcode.com/problems/valid-mountain-array/ Easy
• https://leetcode.com/problems/merge-sorted-array/ Easy

Dynamic Programming

• https://leetcode.com/problems/number-of-smooth-descent-periods-of-a-stock/ Medium
• https://leetcode.com/problems/climbing-stairs/ Easy
• https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ Easy

Greedy

• https://leetcode.com/problems/can-place-flowers/ Easy
• https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/ Medium
• https://leetcode.com/problems/non-overlapping-intervals/ Medium
• https://leetcode.com/problems/merge-intervals/ Medium
• https://leetcode.com/problems/remove-covered-intervals/ Medium
• https://leetcode.com/problems/teemo-attacking/ Easy
• https://leetcode.com/problems/gas-station/ Easy

LinkedLists

• https://leetcode.com/problems/maximum-twin-sum-of-a-linked-list/ Medium

Maths

• https://leetcode.com/problems/find-numbers-with-even-number-of-digits/ Easy
• https://leetcode.com/problems/smallest-integer-divisible-by-k/ Medium
• https://leetcode.com/problems/minimum-moves-to-reach-target-score/ Medium Greedy

Queue

• https://leetcode.com/problems/implement-queue-using-stacks/ Easy
• https://leetcode.com/problems/time-needed-to-buy-tickets/ Easy
• https://www.codingninjas.com/reverse-first-k-elements-of-queue Easy
• https://leetcode.com/problems/design-circular-queue/ Medium
• https://leetcode.com/problems/find-the-winner-of-the-circular-game/ Medium
• https://leetcode.com/problems/design-front-middle-back-queue/ Medium
• https://leetcode.com/problems/product-of-the-last-k-numbers/ Medium

Recursion

• https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/ Easy
• https://www.geeksforgeeks.org/sum-triangle-from-array/ Easy GFG

Search

• https://leetcode.com/problems/binary-search/ Very Easy
• https://leetcode.com/problems/richest-customer-wealth/ Very Easy
• https://leetcode.com/problems/sqrtx/ Very Easy
• https://leetcode.com/problems/first-bad-version/ Very Easy
• https://leetcode.com/problems/valid-perfect-square/ Very Easy
• https://leetcode.com/problems/guess-number-higher-or-lower/ Very Easy
• https://leetcode.com/problems/find-smallest-letter-greater-than-target/ Easy
• https://leetcode.com/problems/peak-index-in-a-mountain-array/ Easy
• https://leetcode.com/problems/find-peak-element/ Easy
• https://leetcode.com/problems/arranging-coins/ Easy
• https://leetcode.com/problems/check-if-n-and-its-double-exist/ Easy
• https://leetcode.com/problems/fair-candy-swap/ Easy
• https://leetcode.com/problems/kth-missing-positive-number/ Easy
• https://leetcode.com/problems/intersection-of-two-arrays/ Easy
• https://leetcode.com/problems/intersection-of-two-arrays-ii/ Easy
• https://leetcode.com/problems/special-array-with-x-elements-greater-than-or-equal-x/ Easy
• https://leetcode.com/problems/search-insert-position/ Easy
• https://leetcode.com/problems/count-negative-numbers-in-a-sorted-matrix/ Easy
• https://www.geeksforgeeks.org/find-rotation-count-rotated-sorted-array/ Easy
• https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/ Easy
• https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/ Medium
• https://leetcode.com/problems/find-right-interval/ Medium
• https://leetcode.com/problems/find-peak-element/ Medium
• https://leetcode.com/problems/find-peak-element/ Medium
• https://leetcode.com/problems/reach-a-number/ Medium
• https://leetcode.com/problems/search-a-2d-matrix/ Medium
• https://leetcode.com/problems/search-a-2d-matrix-ii/ Medium
• https://leetcode.com/problems/search-in-rotated-sorted-array/ Medium
• https://leetcode.com/problems/search-in-rotated-sorted-array-ii/ Medium
• https://leetcode.com/problems/single-element-in-a-sorted-array/ Medium
• https://leetcode.com/problems/find-in-mountain-array/ Hard
• https://leetcode.com/problems/koko-eating-bananas/ Medium

Sorting

• BubbleSort

• CycleSort

  • https://leetcode.com/problems/missing-number/ Easy
  • https://leetcode.com/problems/set-mismatch/ Easy
  • https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/ Easy
  • https://leetcode.com/problems/find-the-duplicate-number/ Medium
  • https://leetcode.com/problems/find-all-duplicates-in-an-array/ Medium

• InsertionSort

• SelectionSort

Stack

• https://leetcode.com/problems/min-stack/ Easy
• https://leetcode.com/problems/backspace-string-compare/ Easy
• https://leetcode.com/problems/implement-stack-using-queues/ Easy
• https://leetcode.com/problems/valid-parentheses/ Easy
• https://leetcode.com/problems/next-greater-element-i/ Easy
• https://www.interviewbit.com/problems/nearest-smaller-element/# Easy
• https://practice.geeksforgeeks.org/problems/sort-a-stack/1 Easy
• https://leetcode.com/problems/largest-rectangle-in-histogram/ Hard
• https://leetcode.com/problems/minimum-add-to-make-parentheses-valid/ Medium
• https://leetcode.com/problems/maximal-rectangle/ Hard

Strings

• https://leetcode.com/problems/find-first-palindromic-string-in-the-array/ Easy
• https://leetcode.com/problems/capitalize-the-title/ Easy
• https://leetcode.com/problems/adding-spaces-to-a-string/ Medium
• https://leetcode.com/problems/longest-palindrome-by-concatenating-two-letter-words/ Medium
• https://leetcode.com/problems/robot-bounded-in-circle/ Medium Recommended
• https://leetcode.com/problems/string-to-integer-atoi/ Medium Recommended
• https://leetcode.com/problems/divide-a-string-into-groups-of-size-k/ Easy
• https://leetcode.com/problems/word-pattern/ Easy
• https://leetcode.com/problems/detect-capital/ Easy

Trees

• https://leetcode.com/problems/insert-into-a-binary-search-tree/ Medium

Concepts / Miscelleneous

• recursion

  • Print Number from 1 to N && from N to 1 && from 1 to N and N to 1 in same
  • Sum and Product Factorial of Number from 1 To N
  • Sum and Product of Digits in a Number
  • Reverse A Number
  • Maximize The Number By Swapping Adjacent Two Digits Not Yet Solved

• dynamic Programming

  • Print possible Sum for Target using given number as many times possible

• binarySearch

  • Order Agnostic Binary Search Binary Search
  • Search in Infinite Array Binary Search
  • Find Binary Search Ceiling Value Binary Search
  • Find Binary Search Floor ValueBinary Search
  • Find Pivot in Rotated Sorted Array Binary Search
  • Find Pivot in Rotated Sorted Element with Duplicates Binary Search
  • Rotation Count for Rotated Array Binary Search
  • Search in Sorted Row and Column Wise Matrix Binary Search
  • Search a Matrix sorted Row and Column wise Binary Search , Matrix
  • Search a Sorted Matrix Binary Search , Matrix

• overflow & underflow

  • String to Integer - Handling Integer Overflow and Underflow

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