leetcode

module
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 Go to latest Published: Aug 9, 2025 License: MIT

README

LeetCode

LeetCode problems and how I solved them.

Structure

  • Explore - useful technics shortcuts for learn
  • Solutions - all solved and refactored problems
  • Again - need resolve because of loosing day streak or not enough knowledge
  • Archive - all solved problems that in progress refactoring
  • Todos - something special for resolve and revise

Development

After adding some code samples run code.sh

make code

You can automate this action by calling pre-commit

# setup pre-commit and check integrity
git config --local core.hooksPath .githooks

Testing

# fast unit tests to be sure that no regression was 
make test/smoke
# same as test/smoke but with -race condition check
make test/unit
# same as test/smoke but with creation local coverage report in HTML for golang
make test/coverage

Completed explores

Completed problems

# Problem Solution
1 Two Sum twosum_1.go
2 Add Two Numbers addtwonumbers.go
3 Longest Substring Without Repeating Characters lengthoflongestsubstring.go
4 Median of Two Sorted Arrays findmediansortedarrays.go
7 Reverse Integer reverse.go
9 Palindrome Number ispalindrome_1.go
17 Letter Combinations of a Phone Number lettercombinations.go
19 Remove Nth Node From End of List removenthfromend.go
35 Search Insert Position searchinsert.go
40 Combination Sum II combinationsum2.go
49 Group Anagrams groupanagrams.go
53 Maximum Subarray maxsubarray.go
56 Merge Intervals merge.go
57 Insert Interval insert.go
58 Length of Last Word lengthoflastword.go
62 Unique Paths uniquepaths.go
69 Sqrt(x) mysqrt.go
70 Climbing Stairs climbstairs.go
75 Sort Colors sortcolors.go
76 Minimum Window Substring minwindow.go
79 Word Search exist.go
94 Binary Tree Inorder Traversal inordertraversal.go
100 Same Tree issametree.go
110 Balanced Binary Tree isbalanced_1.go
118 Pascal's Triangle generate.go
119 Pascal's Triangle II getrow.go
133 Clone Graph clonegraph.go
141 Linked List Cycle hascycle.go
143 Reorder List reorderlist.go
144 Binary Tree Preorder Traversal preordertraversal.go
145 Binary Tree Postorder Traversal postordertraversal.go
150 Evaluate Reverse Polish Notation evalrpn.go
157 Read N Characters Given Read4 solution_1.go
159 Longest Substring with At Most Two Distinct Characters lengthoflongestsubstringtwodistinct.go
160 Intersection of Two Linked Lists getintersectionnode.go
163 Missing Ranges findmissingranges.go
165 Compare Version Numbers compareversion.go
168 Excel Sheet Column Title converttotitle.go
169 Majority Element majorityelement.go
170 Two Sum III - Data structure design twosum_2.go
171 Excel Sheet Column Number titletonumber.go
175 Combine Two Tables 175.sql
176 Second Highest Salary 176.sql
179 Largest Number largestnumber.go
181 Employees Earning More Than Their Managers 181.sql
182 Duplicate Emails 182.sql
183 Customers Who Never Order 183.sql
191 Number of 1 Bits hammingweight.go
193 Valid Phone Numbers 193.sh
195 Tenth Line 195.sh
196 Delete Duplicate Emails 196.sql
197 Rising Temperature 197.sql
198 House Robber rob.go
200 Number of Islands numislands.go
201 Bitwise AND of Numbers Range rangebitwiseand.go
202 Happy Number ishappy.go
205 Isomorphic Strings isisomorphic.go
206 Reverse Linked List reverselist.go
209 Minimum Size Subarray Sum minsubarraylen.go
215 Kth Largest Element in an Array findkthlargest.go
216 Combination Sum III combinationsum3.go
219 Contains Duplicate II containsnearbyduplicate.go
222 Count Complete Tree Nodes countnodes.go
226 Invert Binary Tree inverttree.go
231 Power of Two ispoweroftwo.go
232 Implement Queue using Stacks myqueue.go
234 Palindrome Linked List ispalindrome_2.go
237 Delete Node in a Linked List deletenode.go
238 Product of Array Except Self productexceptself.go
242 Valid Anagram isanagram.go
243 Shortest Word Distance shortestdistance.go
246 Strobogrammatic Number isstrobogrammatic.go
249 Group Shifted Strings groupstrings.go
252 Meeting Rooms canattendmeetings.go
253 Meeting Rooms II minmeetingrooms.go
256 Paint House mincost_2.go
257 Binary Tree Paths binarytreepaths.go
258 Add Digits adddigits.go
263 Ugly Number isugly.go
264 Ugly Number II nthuglynumber.go
266 Palindrome Permutation canpermutepalindrome.go
268 Missing Number missingnumber.go
273 Integer to English Words numbertowords.go
276 Paint Fence numways_2.go
277 Find the Celebrity solution_2.go
279 Perfect Squares numsquares.go
283 Move Zeroes movezeroes.go
285 Inorder Successor in BST inordersuccessor.go
286 Walls and Gates wallsandgates.go
288 Unique Word Abbreviation validwordabbr.go
292 Nim Game canwinnim.go
293 Flip Game generatepossiblenextmoves.go
296 Best Meeting Point mintotaldistance.go
300 Longest Increasing Subsequence lengthoflis.go
303 Range Sum Query - Immutable numarray.go
320 Generalized Abbreviation generateabbreviations.go
323 Number of Connected Components in an Undirected Graph countcomponents.go
325 Maximum Size Subarray Sum Equals k maxsubarraylen.go
333 Largest BST Subtree largestbstsubtree.go
340 Longest Substring with At Most K Distinct Characters lengthoflongestsubstringkdistinct.go
342 Power of Four ispoweroffour.go
344 Reverse String reversestring.go
346 Moving Average from Data Stream movingaverage.go
347 Top K Frequent Elements topkfrequent.go
349 Intersection of Two Arrays intersection.go
350 Intersection of Two Arrays II intersect.go
351 Android Unlock Patterns numberofpatterns.go
359 Logger Rate Limiter logger.go
367 Valid Perfect Square isperfectsquare.go
368 Largest Divisible Subset largestdivisiblesubset.go
380 Insert Delete GetRandom O(1) randomizedset.go
386 Lexicographical Numbers lexicalorder.go
387 First Unique Character in a String firstuniqchar.go
404 Sum of Left Leaves sumofleftleaves.go
405 Convert a Number to Hexadecimal tohex.go
408 Valid Word Abbreviation validwordabbreviation.go
409 Longest Palindrome longestpalindrome.go
414 Third Maximum Number thirdmax.go
415 Add Strings addstrings.go
416 Partition Equal Subset Sum canpartition.go
422 Valid Word Square validwordsquare.go
426 Convert Binary Search Tree to Sorted Doubly Linked List treetodoublylist.go
434 Number of Segments in a String countsegments.go
435 Non-overlapping Intervals eraseoverlapintervals.go
440 K-th Smallest in Lexicographical Order findkthnumber.go
441 Arranging Coins arrangecoins.go
448 Find All Numbers Disappeared in an Array finddisappearednumbers.go
451 Sort Characters By Frequency frequencysort_1.go
452 Minimum Number of Arrows to Burst Balloons findminarrowshots.go
454 4Sum II foursumcount.go
455 Assign Cookies findcontentchildren.go
458 Poor Pigs poorpigs.go
476 Number Complement findcomplement.go
482 License Key Formatting licensekeyformatting.go
485 Max Consecutive Ones findmaxconsecutiveones_1.go
487 Max Consecutive Ones II findmaxconsecutiveones_2.go
500 Keyboard Row findwords.go
501 Find Mode in Binary Search Tree findmode.go
504 Base 7 converttobase7.go
506 Relative Ranks findrelativeranks.go
509 Fibonacci Number fib.go
513 Find Bottom Left Tree Value findbottomleftvalue.go
525 Contiguous Array findmaxlength.go
539 Minimum Time Difference findmindifference.go
541 Reverse String II reversestr.go
543 Diameter of Binary Tree diameterofbinarytree.go
547 Number of Provinces findcirclenum.go
557 Reverse Words in a String III reversewords.go
564 Find the Closest Palindrome nearestpalindromic.go
567 Permutation in String checkinclusion.go
572 Subtree of Another Tree issubtree.go
573 Squirrel Simulation mindistance.go
576 Out of Boundary Paths findpaths.go
577 Employee Bonus 577.sql
584 Find Customer Referee 584.sql
590 N-ary Tree Postorder Traversal postorder.go
592 Fraction Addition and Subtraction fractionaddition.go
593 Valid Square validsquare.go
594 Longest Harmonious Subsequence findlhs.go
595 Big Countries 595.sql
596 Classes More Than 5 Students 596.sql
599 Minimum Index Sum of Two Lists findrestaurant.go
606 Construct String from Binary Tree tree2str.go
617 Merge Two Binary Trees mergetrees.go
621 Task Scheduler leastinterval.go
622 Design Circular Queue mycircularqueue.go
624 Maximum Distance in Arrays maxdistance_1.go
641 Design Circular Deque mycirculardeque.go
643 Maximum Average Subarray I findmaxaverage.go
645 Set Mismatch finderrornums.go
647 Palindromic Substrings countsubstrings.go
650 2 Keys Keyboard minsteps_2.go
652 Find Duplicate Subtrees findduplicatesubtrees.go
661 Image Smoother imagesmoother.go
663 Equal Tree Partition checkequaltree.go
664 Strange Printer strangeprinter.go
666 Path Sum IV pathsum.go
674 Longest Continuous Increasing Subsequence findlengthoflcis.go
680 Valid Palindrome II validpalindrome.go
703 Kth Largest Element in a Stream kthlargest.go
704 Binary Search search.go
705 Design HashSet myhashset.go
706 Design HashMap myhashmap.go
709 To Lower Case tolowercase.go
713 Subarray Product Less Than K numsubarrayproductlessthank.go
719 Find K-th Smallest Pair Distance smallestdistancepair.go
724 Find Pivot Index pivotindex.go
725 Split Linked List in Parts splitlisttoparts.go
729 My Calendar I mycalendar.go
739 Daily Temperatures dailytemperatures.go
746 Min Cost Climbing Stairs mincostclimbingstairs.go
763 Partition Labels partitionlabels.go
779 K-th Symbol in Grammar kthgrammar.go
791 Custom Sort String customsortstring.go
796 Rotate String rotatestring.go
802 Find Eventual Safe States eventualsafenodes.go
819 Most Common Word mostcommonword.go
840 Magic Squares In Grid nummagicsquaresinside.go
841 Keys and Rooms canvisitallrooms.go
844 Backspace String Compare backspacecompare.go
859 Buddy Strings buddystrings.go
860 Lemonade Change lemonadechange.go
867 Transpose Matrix transpose.go
868 Binary Gap binarygap.go
872 Leaf-Similar Trees leafsimilar.go
874 Walking Robot Simulation robotsim.go
875 Koko Eating Bananas mineatingspeed.go
876 Middle of the Linked List middlenode.go
881 Boats to Save People numrescueboats.go
884 Uncommon Words from Two Sentences uncommonfromsentences.go
885 Spiral Matrix III spiralmatrixiii.go
905 Sort Array By Parity sortarraybyparity.go
907 Sum of Subarray Minimums sumsubarraymins.go
912 Sort an Array sortarray.go
917 Reverse Only Letters reverseonlyletters.go
921 Minimum Add to Make Parentheses Valid minaddtomakevalid.go
930 Binary Subarrays With Sum numsubarrayswithsum.go
931 Minimum Falling Path Sum minfallingpathsum.go
935 Knight Dialer knightdialer.go
938 Range Sum of BST rangesumbst.go
947 Most Stones Removed with Same Row or Column removestones.go
948 Bag of Tokens bagoftokensscore.go
953 Verifying an Alien Dictionary isaliensorted.go
962 Maximum Width Ramp maxwidthramp.go
977 Squares of a Sorted Array sortedsquares.go
997 Find the Town Judge findjudge.go
1002 Find Common Characters commonchars.go
1004 Max Consecutive Ones III longestones.go
1018 Binary Prefix Divisible By 5 prefixesdivby5.go
1026 Maximum Difference Between Node and Ancestor maxancestordiff.go
1028 Recover a Tree From Preorder Traversal recoverfrompreorder.go
1051 Height Checker heightchecker.go
1055 Shortest Way to Form String shortestway.go
1057 Campus Bikes assignbikes_1.go
1062 Longest Repeating Substring longestrepeatingsubstring.go
1066 Campus Bikes II assignbikes_2.go
1072 Flip Columns For Maximum Number of Equal Rows maxequalrowsafterflips.go
1079 Letter Tile Possibilities numtilepossibilities.go
1085 Sum of Digits in the Minimum Number sumofdigits.go
1099 Two Sum Less Than K twosumlessthank.go
1100 Find K-Length Substrings With No Repeated Characters numklensubstrnorepeats.go
1101 The Earliest Moment When Everyone Become Friends earliestacq.go
1105 Filling Bookcase Shelves minheightshelves.go
1108 Defanging an IP Address defangipaddr.go
1110 Delete Nodes And Return Forest delnodes.go
1119 Remove Vowels from a String removevowels.go
1120 Maximum Average Subtree maximumaveragesubtree.go
1122 Relative Sort Array relativesortarray.go
1133 Largest Unique Number largestuniquenumber.go
1134 Armstrong Number isarmstrong.go
1137 N-th Tribonacci Number tribonacci.go
1140 Stone Game II stonegameii.go
1143 Longest Common Subsequence longestcommonsubsequence.go
1151 Minimum Swaps to Group All 1's Together minswaps_3.go
1155 Number of Dice Rolls With Target Sum numrollstotarget.go
1160 Find Words That Can Be Formed by Characters countcharacters.go
1165 Single-Row Keyboard calculatetime.go
1167 Minimum Cost to Connect Sticks connectsticks.go
1171 Remove Zero Sum Consecutive Nodes from Linked List removezerosumsublists.go
1189 Maximum Number of Balloons maxnumberofballoons.go
1190 Reverse Substrings Between Each Pair of Parentheses reverseparentheses.go
1198 Find Smallest Common Element in All Rows smallestcommonelement.go
1200 Minimum Absolute Difference minimumabsdifference.go
1207 Unique Number of Occurrences uniqueoccurrences.go
1208 Get Equal Substrings Within Budget equalsubstring.go
1213 Intersection of Three Sorted Arrays arraysintersection.go
1216 Valid Palindrome III isvalidpalindrome.go
1219 Path with Maximum Gold getmaximumgold.go
1221 Split a String in Balanced Strings balancedstringsplit.go
1230 Toss Strange Coins probabilityofheads.go
1239 Maximum Length of a Concatenated String with Unique Characters maxlength.go
1243 Array Transformation transformarray.go
1261 Find Elements in a Contaminated Binary Tree findelements.go
1266 Minimum Time Visiting All Points mintimetovisitallpoints.go
1267 Count Servers that Communicate countservers.go
1269 Number of Ways to Stay in the Same Place After Some Steps numways_1.go
1272 Remove Interval removeinterval.go
1287 Element Appearing More Than 25% In Sorted Array findspecialinteger.go
1290 Convert Binary Number in a Linked List to Integer getdecimalvalue.go
1291 Sequential Digits sequentialdigits.go
1295 Find Numbers with Even Number of Digits findnumbers.go
1310 XOR Queries of a Subarray xorqueries.go
1325 Delete Leaves With a Given Value removeleafnodes.go
1331 Rank Transform of an Array arrayranktransform.go
1337 The K Weakest Rows in a Matrix kweakestrows.go
1346 Check If N and Its Double Exist checkifexist.go
1347 Minimum Number of Steps to Make Two Strings Anagram minsteps_1.go
1352 Product of the Last K Numbers productofnumbers.go
1356 Sort Integers by The Number of 1 Bits sortbybits.go
1358 Number of Substrings Containing All Three Characters numberofsubstrings.go
1360 Number of Days Between Two Dates daysbetweendates.go
1361 Validate Binary Tree Nodes validatebinarytreenodes.go
1367 Linked List in Binary Tree issubpath.go
1371 Find the Longest Substring Containing Vowels in Even Counts findthelongestsubstring.go
1380 Lucky Numbers in a Matrix luckynumbers.go
1381 Design a Stack With Increment Operation customstack.go
1395 Count Number of Teams numteams.go
1405 Longest Happy String longestdiversestring.go
1408 String Matching in an Array stringmatching.go
1413 Minimum Value to Get Positive Step by Step Sum minstartvalue.go
1415 The k-th Lexicographical String of All Happy Strings of Length n gethappystring.go
1422 Maximum Score After Splitting a String maxscore.go
1424 Diagonal Traverse II finddiagonalorder.go
1426 Counting Elements countelements.go
1427 Perform String Shifts stringshift.go
1428 Leftmost Column with at Least a One leftmostcolumnwithone.go
1429 First Unique Number firstunique.go
1436 Destination City destcity.go
1441 Build an Array With Stack Operations buildarray_1.go
1455 Check If a Word Occurs As a Prefix of Any Word in a Sentence isprefixofword.go
1456 Maximum Number of Vowels in a Substring of Given Length maxvowels.go
1457 Pseudo-Palindromic Paths in a Binary Tree pseudopalindromicpaths.go
1460 Make Two Arrays Equal by Reversing Subarrays canbeequal.go
1463 Cherry Pickup II cherrypickup.go
1464 Maximum Product of Two Elements in an Array maxproduct.go
1470 Shuffle the Array shuffle.go
1475 Final Prices With a Special Discount in a Shop finalprices.go
1480 Running Sum of 1d Array runningsum.go
1481 Least Number of Unique Integers after K Removals findleastnumofuniqueints.go
1496 Path Crossing ispathcrossing.go
1497 Check If Array Pairs Are Divisible by k canarrange.go
1503 Last Moment Before All Ants Fall Out of a Plank getlastmoment.go
1507 Reformat Date reformatdate.go
1508 Range Sum of Sorted Subarray Sums rangesum.go
1509 Minimum Difference Between Largest and Smallest Value in Three Moves mindifference.go
1514 Path with Maximum Probability maxprobability.go
1518 Water Bottles numwaterbottles.go
1524 Number of Sub-arrays With Odd Sum numofsubarrays.go
1530 Number of Good Leaf Nodes Pairs countpairs_2.go
1534 Count Good Triplets countgoodtriplets.go
1535 Find the Winner of an Array Game getwinner.go
1539 Kth Missing Positive Number findkthpositive.go
1550 Three Consecutive Odds threeconsecutiveodds.go
1561 Maximum Number of Coins You Can Get maxcoins.go
1574 Shortest Subarray to be Removed to Make Array Sorted findlengthofshortestsubarray.go
1576 Replace All ?'s to Avoid Consecutive Repeating Characters modifystring.go
1578 Minimum Time to Make Rope Colorful mincost_1.go
1581 Customer Who Visited but Did Not Make Any Transactions 1581.sql
1582 Special Positions in a Binary Matrix numspecial.go
1598 Crawler Log Folder minoperations_3.go
1603 Design Parking System parkingsystem.go
1605 Find Valid Matrix Given Row and Column Sums restorematrix.go
1609 Even Odd Tree isevenoddtree.go
1614 Maximum Nesting Depth of the Parentheses maxdepth.go
1624 Largest Substring Between Two Equal Characters maxlengthbetweenequalcharacters.go
1630 Arithmetic Subarrays checkarithmeticsubarrays.go
1633 Percentage of Users Attended a Contest 1633.sql
1634 Add Two Polynomials Represented as Linked Lists add_poly.py
1636 Sort Array by Increasing Frequency frequencysort_2.go
1637 Widest Vertical Area Between Two Points Containing No Points maxwidthofverticalarea.go
1642 Furthest Building You Can Reach furthestbuilding.go
1646 Get Maximum in Generated Array getmaximumgenerated.go
1652 Defuse the Bomb decrypt.go
1653 Minimum Deletions to Make String Balanced minimumdeletions.go
1657 Determine if Two Strings Are Close closestrings.go
1662 Check If Two String Arrays are Equivalent arraystringsareequal.go
1668 Maximum Repeating Substring maxrepeating.go
1669 Merge In Between Linked Lists mergeinbetween.go
1684 Count the Number of Consistent Strings countconsistentstrings.go
1685 Sum of Absolute Differences in a Sorted Array getsumabsolutedifferences.go
1688 Count of Matches in Tournament numberofmatches.go
1695 Maximum Erasure Value maximumuniquesubarray.go
1700 Number of Students Unable to Eat Lunch countstudents.go
1701 Average Waiting Time averagewaitingtime.go
1704 Determine if String Halves Are Alike halvesarealike.go
1716 Calculate Money in Leetcode Bank totalmoney.go
1717 Maximum Score From Removing Substrings maximumgain.go
1720 Decode XORed Array decode.go
1726 Tuple with Same Product tuplesameproduct.go
1730 Shortest Path to Get Food getfood.go
1732 Find the Highest Altitude largestaltitude.go
1740 Find Distance in a Binary Tree finddistance.go
1743 Restore the Array From Adjacent Pairs restorearray.go
1749 Maximum Absolute Sum of Any Subarray maxabsolutesum.go
1750 Minimum Length of String After Deleting Similar Ends minimumlength_1.go
1752 Check if Array Is Sorted and Rotated check.go
1756 Design Most Recently Used Queue mruqueue.go
1757 Recyclable and Low Fat Products 1757.sql
1758 Minimum Changes To Make Alternating Binary String minoperations_1.go
1759 Count Number of Homogenous Substrings counthomogenous.go
1760 Minimum Limit of Balls in a Bag minimumsize.go
1769 Minimum Number of Operations to Move All Balls to Each Box minoperations_5.go
1773 Count Items Matching a Rule countmatches.go
1780 Check if Number is a Sum of Powers of Three checkpowersofthree.go
1784 Check if Binary String Has at Most One Segment of Ones checkonessegment.go
1790 Check if One String Swap Can Make Strings Equal arealmostequal.go
1791 Find Center of Star Graph findcenter.go
1800 Maximum Ascending Subarray Sum maxascendingsum.go
1813 Sentence Similarity III aresentencessimilar.go
1814 Count Nice Pairs in an Array countnicepairs.go
1816 Truncate Sentence truncatesentence.go
1822 Sign of the Product of an Array arraysign.go
1823 Find the Winner of the Circular Game findthewinner.go
1827 Minimum Operations to Make the Array Increasing minoperations_4.go
1829 Maximum XOR for Each Query getmaximumxor.go
1832 Check if the Sentence Is Pangram checkifpangram.go
1836 Remove Duplicates From an Unsorted Linked List deleteduplicatesunsorted.go
1838 Frequency of the Most Frequent Element maxfrequency.go
1844 Replace All Digits with Characters replacedigits.go
1845 Seat Reservation Manager seatmanager.go
1846 Maximum Element After Decreasing and Rearranging maximumelementafterdecrementingandrearranging.go
1852 Distinct Numbers in Each Subarray distinctnumbers.go
1854 Maximum Population Year maximumpopulation.go
1863 Sum of All Subset XOR Totals subsetxorsum.go
1877 Minimize Maximum Pair Sum in Array minpairsum.go
1885 Count Pairs in Two Arrays countpairs_1.go
1887 Reduction Operations to Make the Array Elements Equal reductionoperations.go
1894 Find the Student that Will Replace the Chalk chalkreplacer.go
1897 Redistribute Characters to Make All Strings Equal makeequal.go
1903 Largest Odd Number in String largestoddnumber.go
1905 Count Sub Islands countsubislands.go
1909 Remove One Element to Make the Array Strictly Increasing canbeincreasing.go
1910 Remove All Occurrences of a Substring removeoccurrences.go
1913 Maximum Product Difference Between Two Pairs maxproductdifference.go
1920 Build Array from Permutation buildarray_2.go
1921 Eliminate Maximum Number of Monsters eliminatemaximum.go
1929 Concatenation of Array getconcatenation.go
1930 Unique Length-3 Palindromic Subsequences countpalindromicsubsequence.go
1945 Sum of Digits of String After Convert getlucky.go
1961 Check If String Is a Prefix of Array isprefixstring.go
1963 Minimum Number of Swaps to Make the String Balanced minswaps_2.go
1973 Count Nodes Equal to Sum of Descendants equaltodescendants.go
1975 Maximum Matrix Sum maxmatrixsum.go
1978 Employees Whose Manager Left the Company 1978.sql
1980 Find Unique Binary String finddifferentbinarystring.go
1991 Find the Middle Index in Array findmiddleindex.go
2000 Reverse Prefix of Word reverseprefix.go
2011 Final Value of Variable After Performing Operations finalvalueafteroperations.go
2016 Maximum Difference Between Increasing Elements maximumdifference.go
2017 Grid Game gridgame.go
2022 Convert 1D Array Into 2D Array construct2darray.go
2028 Find Missing Observations missingrolls.go
2032 Two Out of Three twooutofthree.go
2053 Kth Distinct String in an Array kthdistinct.go
2058 Find the Minimum and Maximum Number of Nodes Between Critical Points nodesbetweencriticalpoints.go
2082 The Number of Rich Customers 2082.sql
2090 K Radius Subarray Averages getaverages.go
2094 Finding 3-Digit Even Numbers findevennumbers.go
2096 Step-By-Step Directions From a Binary Tree Node to Another getdirections.go
2099 Find Subsequence of Length K With the Largest Sum maxsubsequence.go
2107 Number of Unique Flavors After Sharing K Candies sharecandies.go
2108 Find First Palindromic String in the Array firstpalindrome.go
2109 Adding Spaces to a String addspaces.go
2116 Check if a Parentheses String Can Be Valid canbevalid.go
2125 Number of Laser Beams in a Bank numberofbeams.go
2134 Minimum Swaps to Group All 1's Together II minswaps_1.go
2149 Rearrange Array Elements by Sign rearrangearray.go
2161 Partition Array According to Given Pivot pivotarray.go
2168 Unique Substrings With Equal Digit Frequency equaldigitfrequency.go
2181 Merge Nodes in Between Zeros mergenodes.go
2182 Construct String With Repeat Limit repeatlimitedstring.go
2185 Counting Words With a Given Prefix prefixcount.go
2191 Sort the Jumbled Numbers sortjumbled.go
2196 Create Binary Tree From Descriptions createbinarytree.go
2206 Divide Array Into Equal Pairs dividearray_2.go
2220 Minimum Bit Flips to Convert Number minbitflips.go
2225 Find Players With Zero or One Losses findwinners.go
2243 Calculate Digit Sum of a String digitsum.go
2244 Minimum Rounds to Complete All Tasks minimumrounds.go
2257 Count Unguarded Cells in the Grid countunguarded.go
2259 Remove Digit From Number to Maximize Result removedigit.go
2264 Largest 3-Same-Digit Number in String largestgoodinteger.go
2265 Count Nodes Equal to Average of Subtree averageofsubtree.go
2270 Number of Ways to Split Array waystosplitarray.go
2275 Largest Combination With Bitwise AND Greater Than Zero largestcombination.go
2294 Partition Array Such That Maximum Difference Is K partitionarray.go
2326 Spiral Matrix IV spiralmatrix.go
2331 Evaluate Boolean Binary Tree evaluatetree.go
2337 Move Pieces to Obtain a String canchange.go
2341 Maximum Number of Pairs in Array numberofpairs.go
2342 Max Sum of a Pair With Equal Sum of Digits maximumsum.go
2349 Design a Number Container System numbercontainers.go
2353 Design a Food Rating System foodratings.go
2357 Make Array Zero by Subtracting Equal Amounts minimumoperations_1.go
2364 Count Number of Bad Pairs countbadpairs.go
2375 Construct Smallest Number From DI String smallestnumber.go
2379 Minimum Recolors to Get K Consecutive Black Blocks minimumrecolors.go
2381 Shifting Letters II shiftingletters.go
2385 Amount of Time for Binary Tree to Be Infected amountoftime.go
2391 Minimum Amount of Time to Collect Garbage garbagecollection.go
2401 Longest Nice Subarray longestnicesubarray.go
2410 Maximum Matching of Players With Trainers matchplayersandtrainers.go
2413 Smallest Even Multiple smallestevenmultiple.go
2415 Reverse Odd Levels of Binary Tree reverseoddlevels.go
2418 Sort the People sortpeople.go
2419 Longest Subarray With Maximum Bitwise AND longestsubarray.go
2425 Bitwise XOR of All Pairings xorallnums.go
2433 Find The Original Array of Prefix Xor findarray.go
2434 Using a Robot to Print the Lexicographically Smallest String robotwithstring.go
2441 Largest Positive Integer That Exists With Its Negative findmaxk.go
2460 Apply Operations to an Array applyoperations.go
2469 Convert the Temperature converttemperature.go
2482 Difference Between Ones and Zeros in Row and Column onesminuszeros.go
2485 Find the Pivot Integer pivotinteger.go
2487 Remove Nodes From Linked List removenodes.go
2490 Circular Sentence iscircularsentence.go
2491 Divide Players Into Teams of Equal Skill divideplayers.go
2516 Take K of Each Character From Left and Right takecharacters.go
2523 Closest Prime Numbers in Range closestprimes.go
2529 Maximum Count of Positive Integer and Negative Integer maximumcount.go
2537 Count the Number of Good Subarrays countgood.go
2540 Minimum Common Value getcommon.go
2549 Count Distinct Numbers on Board distinctintegers.go
2554 Maximum Number of Integers to Choose From a Range I maxcount.go
2558 Take Gifts From the Richest Pile pickgifts.go
2559 Count Vowel Strings in Ranges vowelstrings.go
2563 Count the Number of Fair Pairs countfairpairs.go
2570 Merge Two 2D Arrays by Summing Values mergearrays.go
2574 Left and Right Sum Differences leftrightdifference.go
2579 Count Total Number of Colored Cells coloredcells.go
2582 Pass the Pillow passthepillow.go
2595 Number of Even and Odd Bits evenoddbit.go
2599 Make the Prefix Sum Non-negative makeprefsumnonnegative.go
2610 Convert an Array Into a 2D Array With Conditions findmatrix.go
2619 Array Prototype Last last.js
2620 Counter createCounter1.js
2621 Sleep sleep.js
2622 Cache With Time Limit timeLimitedCache.js
2623 Memoize memoize.js
2625 Flatten Deeply Nested Array flat.js
2626 Array Reduce Transformation reduce.js
2627 Debounce debounce.js
2628 JSON Deep Equal areDeeplyEqual.js
2629 Function Composition compose.js
2631 Group By groupBy.js
2632 Curry curry.js
2633 Convert Object to JSON String jsonStringify.js
2634 Filter Elements from Array filter.js
2635 Apply Transform Over Each Element in Array map.js
2636 Promise Pool promisePooljs
2637 Promise Time Limit timeLimit.js
2652 Sum Multiples sumofmultiples.go
2657 Find the Prefix Common Array of Two Arrays findtheprefixcommonarray.go
2661 First Completely Painted Row or Column firstcompleteindex.go
2665 Counter II createCounter2.js
2666 Allow One Function Call once.js
2667 Create Hello World Function createHelloWorld.js
2676 Throttle throttle.js
2677 Chunk Array chunk.js
2678 Number of Senior Citizens countseniors.go
2683 Neighboring Bitwise XOR doesvalidarrayexist.go
2694 Event Emitter eventEmitter.js
2695 Array Wrapper arrayWrapper.js
2696 Minimum String Length After Removing Substrings minlength.go
2703 Return Length of Arguments Passed argumentsLength.js
2704 To Be Or Not To Be expect.js
2705 Compact Object compactObject.js
2706 Buy Two Chocolates buychoco.go
2715 Timeout Cancellation cancellable1.js
2721 Execute Asynchronous Functions in Parallel promiseAll.js
2722 Join Two Arrays by ID join.js
2723 Add Two Promises addTwoPromises.js
2724 Sort By sortBy.js
2725 Interval Cancellation cancellable2.js
2726 Calculator with Method Chaining calculator.js
2727 Is Object Empty isEmpty.js
2744 Find Maximum Number of String Pairs maximumnumberofstringpairs.go
2769 Find the Maximum Achievable Number themaximumachievablex.go
2779 Maximum Beauty of an Array After Applying Operation maximumbeauty.go
2785 Sort Vowels in a String sortvowels.go
2788 Split Strings by Separator splitwordsbyseparator.go
2796 Repeat String replicate.js
2807 Insert Greatest Common Divisors in Linked List insertgreatestcommondivisors.go
2816 Double a Number Represented as a Linked List doubleit.go
2825 Make String a Subsequence Using Cyclic Increments canmakesubsequence.go
2843 Count Symmetric Integers countsymmetricintegers.go
2849 Determine if a Cell Is Reachable at a Given Time isreachableattime.go
2864 Maximum Odd Binary Number maximumoddbinarynumber.go
2870 Minimum Number of Operations to Make Array Empty minoperations_2.go
2877 Create a DataFrame from List create_dataframe.py
2879 Display the First Three Rows select_first_rows.py
2884 Modify Columns modify_salary_column.py
2894 Divisible and Non-divisible Sums Difference differenceofsums.go
2899 Last Visited Integers lastvisitedintegers.go
2900 Longest Unequal Adjacent Groups Subsequence I getLongestSubsequence.go
2914 Minimum Number of Changes to Make Binary String Beautiful minchanges.go
2938 Separate Black and White Balls minimumsteps.go
2942 Find Words Containing Character findwordscontaining.go
2958 Length of Longest Subarray With at Most K Frequency maxsubarraylength.go
2965 Find Missing and Repeated Values findmissingandrepeatedvalues.go
2966 Divide Array Into Arrays With Max Difference dividearray_1.go
2971 Find Polygon With the Largest Perimeter largestperimeter.go
2981 Find Longest Special Substring That Occurs Thrice I maximumlength.go
3005 Count Elements With Maximum Frequency maxfrequencyelements.go
3011 Find if Array Can Be Sorted cansortarray.go
3016 Minimum Number of Pushes to Type Word II minimumpushes.go
3024 Type of Triangle triangletype.go
3032 Count Numbers With Unique Digits II numbercount.go
3042 Count Prefix and Suffix Pairs I countprefixsuffixpairs.go
3062 Winner of the Linked List Game gameresult.go
3063 Linked List Frequency frequenciesofelements.go
3066 Minimum Operations to Exceed Threshold Value II minoperations_6.go
3075 Maximize Happiness of Selected Children maximumhappinesssum.go
3105 Longest Strictly Increasing or Strictly Decreasing Subarray longestmonotonicsubarray.go
3110 Score of a String scoreofstring.go
3133 Minimum Array End minend.go
3136 Valid Word isvalid.go
3146 Permutation Difference between Two Strings findpermutationdifference.go
3151 Special Array I isarrayspecial.go
3160 Find the Number of Distinct Colors Among the Balls queryresults.go
3168 Minimum Number of Chairs in a Waiting Room minimumchairs.go
3169 Count Days Without Meetings countdays.go
3173 Bitwise OR of Adjacent Elements orarray.go
3174 Clear Digits cleardigits.go
3189 Minimum Moves to Get a Peaceful Board minmoves.go
3190 Find Minimum Operations to Make All Elements Divisible by Three minimumoperations_2.go
3191 Minimum Operations to Make Binary Array Elements Equal to One I minoperations_7.go
3208 Alternating Groups II numberofalternatinggroups.go
3217 Delete Nodes From Linked List Present in Array modifiedlist.go
3223 Minimum Length of String After Operations minimumlength_2.go
3263 Convert Doubly Linked List to Array I toarray.go
3264 Final Array State After K Multiplication Operations I getfinalstate.go
3280 Convert Date to Binary convertdatetobinary.go
3289 The Two Sneaky Numbers of Digitville getsneakynumbers.go
3304 Find the K-th Character in String Game I kthcharacter.go
3306 Count of Substrings Containing Every Vowel and K Consonants II countofsubstrings.go
3330 Find the Original Typed String I possiblestringcount.go
3335 Total Characters in String After Transformations I lengthAfterTransformations.go
3340 Check Balanced String isbalanced_2.go
3375 Minimum Operations to Make Array Values Equal to K minoperations_8.go
3396 Minimum Number of Operations to Make Elements in Array Distinct minimumoperations_3.go
3423 Maximum Difference Between Adjacent Elements in a Circular Array maxadjacentdistance.go
3443 Maximum Manhattan Distance After K Changes maxdistance_2.go
3487 Maximum Unique Subarray Sum After Deletion maxsum.go

Directories

Path Synopsis
legacy
again/Graph
again/NestedIterator
again/canTraverseAllPairs
again/constrainedSubsetSum
again/countOfAtoms
again/countVowelPermutation
again/distanceToCycle command
again/findAllPeople
again/findChampion
again/findCheapestPrice
again/findDuplicates
again/findScore
again/findTheCity
again/firstMissingPositive
again/fullBloomFlowers
again/getLengthOfOptimalCompression
again/integerBreak
again/isArraySpecial
again/jobScheduling
again/kInversePairs
again/largestSubmatrix
again/maxChunksToSorted
again/maxDotProduct
again/maxLength
again/maxPoints
again/maxSumAfterOperation
again/maxSumAfterPartitioning
again/maximumBeauty
again/maximumScore
again/minDays
again/minDifficulty
again/minOperations
again/minScore
again/minSubarray
again/minimizedMaximum
again/minimumCost1
again/minimumCost2
again/minimumOneBitOperations
again/minimumSubarrayLength
again/minimumTime
again/modifiedGraphEdges
again/mostBooked
again/numBusesToDestination
again/numDecodings
again/numOfArrays
again/numSubmatrixSumTarget
again/numberOfArithmeticSlices
again/numberOfWays
again/paintWalls
again/primeSubOperation
again/regionsBySlashes
again/secondMinimum
again/shortestDistanceAfterQueries
again/shortestPalindrome
again/slidingPuzzle
again/sumPrefixScores
again/survivedRobotsHealths
again/treeDiameter
arch/LRUCache
arch/MinStack
arch/MyLinkedList
arch/MyStack
arch/RecentCounter
arch/SnapshotArray
arch/Solution
arch/StockSpanner
arch/addBinary
arch/areOccurrencesEqual
arch/arrayPairSum
arch/asteroidCollision
arch/canConstruct
arch/canMakeArithmeticProgression
arch/canPlaceFlowers
arch/checkStraightLine
arch/closestValue
arch/compress
arch/containsDuplicate
arch/countBits
arch/countNegatives
arch/countPrimes
arch/decodeString
arch/deepestLeavesSum
arch/deleteDuplicates
arch/deleteMiddle
arch/deleteNode
arch/dominantIndex
arch/equalPairs
arch/findAnagrams
arch/findDiagonalOrder
arch/findDifference
arch/findDuplicate
arch/findInMountainArray
arch/findLucky
arch/findPeakElement
arch/findTheDifference
arch/firstBadVersion
arch/fizzBuzz
arch/gcdOfStrings
arch/getMinimumDifference
arch/goodNodes
arch/guessNumber
arch/hammingDistance
arch/hammingWeight
arch/hasPathSum
arch/increasingTriplet
arch/insertIntoBST
arch/intersection
arch/isPalindrome
arch/isPowerOfThree
arch/isSubsequence
arch/isSymmetric
arch/isValid
arch/isValidBST
arch/isValidSudoku
arch/kidsWithCandies
arch/largestValues
arch/levelOrder
arch/longestArithSeqLength
arch/longestCommonPrefix
arch/longestPalindrome
arch/longestSubarray
arch/longestZigZag
arch/lowestCommonAncestor
arch/majorityElement
arch/makeGood
arch/maxArea
arch/maxDepth
arch/maxLevelSum
arch/maxOperations
arch/maxProfit
arch/maxSlidingWindow
arch/maximumWealth
arch/merge
arch/mergeAlternately
arch/mergeTwoLists
arch/minDepth
arch/minDiffInBST
arch/minimumCardPickup
arch/myAtoi
arch/nextGreaterElement
arch/nextGreatestLetter
arch/numFactoredBinaryTrees
arch/numIdenticalPairs
arch/numJewelsInStones
arch/numberOfSteps
arch/numberOfSubarrays
arch/oddEvenList
arch/pairSum
arch/pathSum
arch/peakIndexInMountainArray
arch/plusOne
arch/predictPartyVictory
arch/removeDuplicates
arch/removeElement
arch/removeElements
arch/removeStars
arch/repeatedCharacter
arch/reverseBetween
arch/reverseBits
arch/reverseEvenLengthGroups
arch/reverseVowels
arch/reverseWords
arch/rightSideView
arch/romanToInt
arch/rotate
arch/searchBST
arch/searchRange
arch/simplifyPath
arch/singleNumber
arch/sortedArrayToBST
arch/spiralOrder
arch/strStr
arch/subarraySum
arch/successfulPairs
arch/sum
arch/sumOfUnique
arch/summaryRanges
arch/swapNodes
arch/swapPairs
arch/totalCost
arch/twoSum
arch/validateStackSequences
arch/winnerOfGame
arch/wordPattern
arch/zigzagLevelOrder
solutions
golang

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