| Number | Name | Tags |
|---|---|---|
| 76 | Minimum Window Substring | #sliding-window #hashmap #array #string #done-b4 |
| 84 | Largest rectangle in histogram | #🙅🏻♀ #monotonic-stack #dynamic-programming #stack |
| 85 | Maximal Rectangle | #based-on-others #monotonic-stack #dynamic-programming #stack |
| 126 | Word ladder | #strings #hashing #trie #bfs #graphs #backtracking #personal-experiment |
| 127 | Word ladder | #strings #hashing #trie #bfs #graphs |
| 139 | Word Break | #dynamic-programming #trie #string #hashing |
| 140 | Word Break II | #dynamic-programming #trie #string #hashing #backtracking |
| 189 | Rotate array | #array #rotation #trick #easy |
| 207 | Course Schedule | #easy #dfs #graphs #cycle-detection |
| 235 | Lowest Common Ancestor of a Binary Search Tree | #easy #binary-tree |
| 315 | Count of Smaller Numbers After Self | |
| 319 | Bulb switcher | #maths #trick #simulation-was-overkill |
| 354 | 354. Russian Doll Envelopes | |
| 391 | PerfectRectangle | #trick #math |
| 397 | Count Range Sum | #merge-sort #merge-algo #math #sliding-window #binary-search-tree #binary-indexed-tree |
| 437 | PathSumIII | binary-tree #preorder-traversal #dfs #bfs #dynamic-programming |
| 466 | Count Reps | #pattern-matching #dp |
| 493 | Reverse pairs | #binary-search #bst #merge-sort #segment-tree #binary-indexed-tree |
| 502 | IPO | #greedy #heap #priority-queue #trivial-optimization |
| 515 | 515. Find Largest Value in Each Tree Row | #binary-tree #bfs #dfs |
| 518 | Counting Coins II | #dynamic-programming #memory-optimization |
| 546 | Remove boxes | #dynamic-programming #array #tricky #important |
| 547 | Number of Provinces | #graphs #dfs #bfs |
| 560 | Subarray Sum Equals K | #simulation #dynamic-programming |
| 664 | Strange printer | #dynamic-programming #array #tricky #important |
| 672 | Bulb switcher II | #simulation-on-paper #trick #simulation-was-overkill-in-code |
| 684 | Redudant Connections | #dfs #cycle-detection |
| 695 | Max Area of Island | #dfs #bfs #graphs #cycle-detection #matrix |
| 719 | Find K-th Smallest Pair Distance | #binary-search #binary-search-over-solution-space #tricky |
| 740 | Delete and Earn | |
| 743 | Network Delay Time | #dijkstras-algorithm |
| 756 | Pyramid transition matrix | #dfs #bfs #recursion #backtracking |
| 789 | Escaaape the ghosts | #math #easy |
| 799 | Champagne Tower | |
| 803 | Bricks falling when hit+Sol#1 | #dfs #bfs #graphs #union-find |
| 826 | Most Profit Assigning Work | #implmentation |
| 838 | Push dominoes | #implmentation |
| 841 | Keys and rooms | #dfs |
| 875 | Koko eating bananas | #binary-search #bin-search-over-solution-space |
| 877 | Stone Game | #dynamic-programming #game-theory #greedy #math |
| 887 | Super Egg Drop | #binary-search #dynamic-programming #tricky-optimization |
| 917 | Reverse Only Letters | #easy #memory-optimization #two-pass |
| 927 | Three equal parts | #math #array #tricky #math:divisibility-rule |
| 938 | Range sum of BST | #easy #bst |
| 956 | Tallest Billboard | #dynamic-programming #knapsack #memoization #tricky #unbounded-knapsack |
| 960 | Delete Columns to Make Sorted III | #dynamic-programming #longest-increasing-subseq #memory-optimization |
| 982 | Triples with Bitwise AND Equal To Zero | #bitwise-ops #math #combinatorics #optimization |
| 983 | Minimum Cost For Tickets | #dynamic-programming #array #greedy |
| 995 | Minimum Number Of K Consecutive Bit Flips | #tricky-approach #queue #sliding-window #unable-to-do-on-my-own |
| 1091 | Shortest Path in Binary Matrix | #bfs #shortest-path #matrix |
| 1092 | Shortest Common Supersequence | #dynamic-programming #memory-optimization #LCS #piggybacking |
| 1143 | Longest common sub-seq | #dynamic-programming #memory-optimization |
| 1147 | Longest Chunked Palindrome Decomposition | #dynamic-programming #palindrome #no-effort #two-pointer #string |
| 1155 | Rolling dice with sum | #dynamic-programming #memory-optimization |
| 1192 | Connections in a Network - Articulation points | #dynamic-programming #graph-theory #cycle-detection |
| 1202 | Smallest String With Swaps | |
| 1210 | Minimum Moves to Reach Target with Rotations | #bfs #dp #tricky #optimization #memoization-optimization |
| 1249 | Minimum Remove to Make Valid Parentheses | #stacks #string |
| 1263 | Minimum Moves to Move a Box to Their Target Location | #dfs #state-traversal #bfs #route-optimization #tricky |
| 1320 | Minimum Distance to Type a Word Using Two Fingers | #dynamic-programming #small-trick #optimization #memoization-optimization |
| 1323 | Max 69 number | #java #easy |
| 1376 | #dfs #easy #bfs #tree | |
| 1414 | Find the Minimum Number of Fibonacci Numbers Whose Sum Is K | #math #greedy |
| 1463 | Cherry Pickup II | #dfs #dynamic-programming |
| 1467 | Probability of a Two Boxes Having The Same Number of Distinct Balls | #dynamic-programming #memoization #combinatorics #backtracking #tricky #hard |
| 1478 | Allocate Mailboxes | #math #dynamic-programming #sorting |
| 1499 | max-value-of-equation | #heap #sliding-window #deque #maths |
| 1514 | Path with Maximum Probability | #dijkstras-algorithm |
| 1521 | Find a Value of a Mysterious Function Closest to Target | #bitset-ops #hashing #optimization #cheated🙃 |
| 1534 | Count Good Triplets | |
| 1547 | Minimum Cost to Cut a Stick | |
| 1575 | Count All Possible Routes | #dfs #dynamic-programming #array |
| 1578 | Minimum Time to Make Rope Colorful | #greedy #math #simple |
| 1591 | Strange Printer II | #topological-sort |
| 1626 | Best Team With No Conflicts | #dp #binary-indexed-tree #longest-increasing-subsequence #sorting |
| 1685 | Sum of Absolute Differences in a Sorted Array | #math |
| 1687 | Delivering Boxes from Storage to Ports | #dynamic-programming #sliding-window #mono-deque #prefix-sum #segment-tree #optimization #sliding-window |
| 1720 | Decode XORed arr | #binary-math #easy |
| 1722 | Minimise Hamming Distance | #graphs #math-and-logic #strongly-connected-components #dfs |
| 1728 | Cat and mouse II | #graphs #dfs #dp #memoiation #game-theory #trick #dfs-no-visit-track #dfs |
| 1735 | Count Ways to Make Array With Product | #sieve-eratosthenes #combinatorics #math #dp #tricky |
| 1737 | Change Minimum Characters to Satisfy One of Three Conditions | |
| 1761 | Minimum Degree of a Connected Trio in a Graph | #BRUTE-force #graph |
| 1769 | Minimum Number of Operations to Move All Balls to Each Box | #prefix-sum-concept #array #math #easy |
| 1775 | Equal Sum Arrays With Minimum Number of Operations | #greedy-simulation #greedy #buckets |
| 1793 | Maximum Score of a Good Subarray | #greedy #two-pointer #ranged-two-pointer #based-on-others #monotonic-stack #dynamic-programming #stack |
| 1799 | Maximize Score After N Operations | #backtracking #dynamic-programming #gcd #memoization #tricky-optimization #bitmasking |
| 1855 | Maximum Distance Between a Pair of Values | #two-pointer-approach #binary-search #greedy #array-traversal |
| 1894 | Find the Student that Will Replace the Chalk | #prefix-sum #binary-search #trivial #simulation #preventing-recomputes |
| 1936 | Add Minimum Number of Rungs | #maths #greedy |
| 1970 | Last Day Where You Can Still Cross | #binary-search #dfs #bfs #disjoint-sets #tricky #inverse-thought-process |
| 1997 | First Day Where You Have Been in All the Rooms | #greedy #tricky-dp #graphs #dynamic-programming #deep-logic |
| 2076 | Process Restricted Friend Requests | |
| 2127 | Maximum Employees to Be Invited to a Meeting | #dfs #cycle-detection #tricky #ques-specific-approximation |
| 2217 | Find Palindrome With Fixed Length | #math #array |
| 2218 | Maximum Value of K Coins From Piles | |
| 2258 | Escape the Spreading Fire | #dfs #bfs #binary-search #binary-search-over-solution-space #optimization |
| 2260 | Minimum Consecutive Cards to Pick Up | sliding-window #hashing |
| 2271 | Maximum White Tiles Covered by a Carpet | #tricky #banged-head-in-the-wall-for-it #critical-edge-case |
| 2290 | Minimum Obstacle Removal to Reach Corner | #graphs #bfs #dfs #dijkstras-algo #optinization #shortest-path-tree #minsweeper |
| 2295 | Replace Elements in an Array | |
| 2316 | Count Unreachable Pairs of Nodes in an Undirected Graph | #graphs #dfs #bfs #scc |
| 2318 | Number of Distinct Roll Sequences | #backtracking #dynamic-programming |
| 2322 | Minimum Score After Removals on a Tree | #trees #graph-theory #dynamic-programming #tricky |
| 2320 | Count Number of Ways to Place Houses | |
| 2321 | Maximum Score Of Spliced Array | |
| 2338 | Count the Number of Ideal Arrays | #combinatorics #dynamic-programming #tricky #hard |
| 2347 | Best Poker Hand | #easy |
| 2348 | Number of Zero-Filled Subarrays | #combinatorics |
| 2353 | Design a Food Rating System | #lld #crude-impl #hashmaps #bst #heap |
| 2349 | Design a Number Container System | #maps #sets #bst #augmented-data-str |
| 2350 | Shortest Impossible Sequence of Rolls | #maps #sets #bst #augmented-data-str |
| 2400 | Number of Ways to Reach a Position After Exactly k Steps | #dynaic-programming #math #combinatorics |
| 2402 | Meeting Rooms III | #heaps #hard #tricky-impl |
| 2406 | Divide Intervals Into Minimum Number of Groups | #heaps #meeting-rooms #line-sweep |
| 2433 | Find The Original Array of Prefix Xor | #easy #binary-math |
| 2435 | Paths in Matrix Whose Sum Is Divisible by K | #dfs #dynamic-programming #matrix |
| 2444 | Count Subarrays With Fixed Bounds | #tricky #sliding-windows #twist |
| 2551 | Put Marbles in Bags | #math #combinatorics #dp #tricky |
| 2456 | Most Popular Video Creator | #greedy #priority-queue #sorting #math #optimization |
| 2458 | Height of Binary Tree After Subtree Removal Queries | #DFS #bfs #binary-tree #tricky #best-and-2nd-best |
| 2477 | MinimumFuelToReportToCapitol | #DFS #bfs #tree #post-order-traversal #math-and-logic |
| 2508 | Add Edges to Make Degrees of All Nodes Even | ##two-pointer #sliding-window #unconventional-traversal |
| 2516 | Take K of Each Character From Left and Right | #split-sliding-window #sliding-window #suffix-precomputation |
| 2554 | Maximum Number of Integers to Choose From a Range I | #contest #greedy #traversal |
| 2555 | Separate Digits in an Array | #contest #easy #traversal |
| 2556 | Disconnect Path in a Binary Matrix by at Most One Flip | #dfs #rashly-coded #contest |
| 2565 | Subsequence With the Minimum Score | #split-sliding-window #sliding-window #suffix-precomputation #dp #binary-search #bin-search-across_sol-space |
| 2663 | Lexicographically Smallest Beautiful String | # |
| 2809 | Minimum Time to Make Array Sum At Most x // Minimum Time to Make Array Sum At Most x | #tricky #very-hard #dynamic-programming #array #sorting #greedy #ai-wrote-this-description #contest |
| 2810 | Faulty Keyboard | #contest #simulation #very-easy |
| 2811 | Check if it is Possible to Split Array | # |
| 2813 | Maximum Elegance of a K-Length Subsequence | #greedy #array |
| 2812 | Find the Safest Path in a Grid | #contest #dfs #bfs #dijkstra-algorithm #priority-queue #binary-search |
| 2813 | Find the Minimum Number of Fibonacci Numbers Whose Sum Is K | #contest #greedy #math #easy |
| 2815 | Max Pair Sum in an Array | #contest #array #hashing #easy |
| 2816 | Double a Number Represented as a Linked List | #math #linked-list |
| 2817 | Minimum Absolute Difference Between Elements With Constraint | #array #binary-search #binary-search-tree |
| 2818 | Apply operations to maximize score | #array #stack #queue #priorityqueue #math #prime #optimization #important |
| 2824 | Count Pairs Whose Sum is Less than Target | #easy #brute-force #contest #sorting #two-pointer |
| 2825 | Make String a Subsequence Using Cyclic Increments | #contest #easy #greedy #two-pointer |
| 2826 | Sorting Three Groups | #easy #greedy #memoization #dynamic-programming #contest |
| 2842 | Count K-Subsequences of a String With Maximum Beauty | #contest #math #greedy #combinatorics #combinatorial-optimization |
| 2860 | Happy students | #array #greedy #sorting #contest |
| 2861 | Max Number Of Alloys | #contest #binary-search #greedy |
| 2869 | Minimum Operations to Collect Elements | #easy #sets #contest |
| 2870 | Minimum Number of Operations to Make Array Empty | #dp #math #contest |
| 2872 | Maximum Number of K-Divisible Components | #math #divisibility-rules #contest #dfs #greedy |
| MSOA | Contiguous Subarray Count with Arithmetic Mean | #maths #dynamic-programming #tricky |
| MSOA | Build max-sized array with constraints | #smart-enumeration #backtracking #on-constraint-switch #heap |
| Uber_OA #2 | Subsequence of a in copies of b |
|
| Uber_OA #3 | Farmer John | |
| Unk | Bellman Ford algorithm | #graph-theory #dynamic-programming |
| Unk | Floyd Warshall algorithm | #graph-theory #dynamic-programming |
Unlisted in count: 25 Total: 161/160
Note: I don't count easy questions in above count. Also, many of the solved questions aren't all listed as well.
As of writing this, I have solved 447 questions on Leetcode of which 365 are Med/Hard ones. I am not bragging, just putting myself out there, but I have done a ton of questions on other platforms as well, combined(yes literally it's just over 1k). Codeforces, HackerRank, HackerEarth, GFG, Google Kickstart... the list does not go on. For first three I have forgotten the account-ids and being stupidly lazy, I will never bother to retrieve them again. Done this many problems and yet I make a truckload🚚 of stupid mistakes.
I created this repo to write about my approach. In no way it's perfect. And in no way my backlog is anywhere near complete. Infact it grows more than it shrinks down, as I do more and more of such problems.
It was decided by me last year(in a .gitignore'd file), that I'd start preparing for the switch wholeheartedly once I reach a certain threshold. 160 in my case. And it's now time. I'll be archiving this and be continuing in a next one. Where I'd work on my LLD and HLD skills relevant to interview processes.
Lastly, I'd like to put it down that I'll be carring on over at ascraeus-mons. Do check it out.
P.S. And yes, I am fascinated by space. That's why I finished up the game of Starfield last week.