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1,223 problems · 784 with a MIK video · 405 asked in the last 6 months
D · DSA 722Q · SQL & DBMS 62
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1223 problems, most frequent first

DoneLC #ProblemLevelHow often askedMIK video
1Two SumArrays · Asked in the last 6 monthsEasy100▶ Watch
56Merge Intervals ↗Asked in the last 6 monthsMedium87Not covered yet
2Add Two Numbers ↗Asked in the last 6 monthsMedium85Not covered yet
3Longest Substring Without Repeating Characters ↗Asked in the last 6 monthsMedium85Not covered yet
380Insert Delete GetRandom O(1)Design Data Structures · Asked in the last 6 monthsMedium85▶ Watch
200Number of IslandsArrays · Asked in the last 6 monthsMedium85▶ Watch
121Best Time to Buy and Sell Stock ↗Asked in the last 6 monthsEasy84Not covered yet
20Valid ParenthesesStack · Asked in the last 6 monthsEasy84▶ Watch
42Trapping Rain WaterArrays · Asked in the last 6 monthsHard81▶ Watch
5Longest Palindromic SubstringDynamic Programming · Asked in the last 6 monthsMedium80▶ Watch
153SumArrays · Asked in the last 6 monthsMedium80▶ Watch
1169Invalid Transactions ↗Asked in the last 6 monthsMedium79Not covered yet
430Flatten a Multilevel Doubly Linked List ↗Asked in the last 6 monthsMedium79Not covered yet
4Median of Two Sorted ArraysBinary Search · Asked in the last 6 monthsHard78▶ Watch
14Longest Common Prefix ↗Asked in the last 6 monthsEasy78Not covered yet
79Word SearchBacktracking · Asked in the last 6 monthsMedium78▶ Watch
11Container With Most WaterArrays · Asked in the last 6 monthsMedium77▶ Watch
394Decode String ↗Asked in the last 6 monthsMedium76Not covered yet
169Majority ElementArrays · Asked in the last 6 monthsEasy75▶ Watch
242Valid AnagramStrings · Asked in the last 6 monthsEasy75▶ Watch
7Reverse Integer ↗Asked in the last 6 monthsMedium75Not covered yet
88Merge Sorted Array ↗Asked in the last 6 monthsEasy75Not covered yet
9Palindrome Number ↗Asked in the last 6 monthsEasy74Not covered yet
26Remove Duplicates from Sorted ArrayTwo Pointers · Asked in the last 6 monthsEasy74▶ Watch
146LRU CacheDesign Data Structures · Asked in the last 6 monthsMedium73▶ Watch
21Merge Two Sorted Lists ↗Asked in the last 6 monthsEasy72Not covered yet
560Subarray Sum Equals KArrays · Asked in the last 6 monthsMedium72▶ Watch
1396Design Underground SystemDesign Data Structures · Asked in the last 6 monthsMedium72▶ Watch
128Longest Consecutive Sequence ↗Asked in the last 6 monthsMedium72Not covered yet
13Roman to Integer ↗Asked in the last 6 monthsEasy72Not covered yet
33Search in Rotated Sorted ArrayBinary Search · Asked in the last 6 monthsMedium71▶ Watch
49Group AnagramsArrays · Asked in the last 6 monthsMedium70▶ Watch
155Min Stack ↗Asked in the last 6 monthsMedium70Not covered yet
78SubsetsBacktracking · Asked in the last 6 monthsMedium70▶ Watch
31Next PermutationArrays · Asked in the last 6 monthsMedium69▶ Watch
53Maximum Subarray ↗Asked in the last 6 monthsMedium69Not covered yet
283Move Zeroes ↗Asked in the last 6 monthsEasy67Not covered yet
70Climbing StairsDynamic Programming · Asked in the last 6 monthsEasy67▶ Watch
387First Unique Character in a StringStrings · Asked in the last 6 monthsEasy67▶ Watch
253Meeting Rooms IIPrefix Sum & Difference Array · Asked in the last 6 months · LeetCode PremiumMedium66▶ Watch

Source: community data (liquidslr/leetcode-company-wise-problems), updated Aug 16, 2026. Company tags are crowd-reported and may be incomplete.