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残酷刷题群动态规划的套路小讲座残酷群2020年会残酷群2021年会
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GitHub代码Lee215 特别节目
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No.TitleDateTag 1Tag 2LeveldifficultyYouTubeRecording DateB站
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3405Find the Lexicographically Largest String From the Box IStringHard
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1163Last Substring in Lexicographical OrderStringHard
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2800Shortest String That Contains Three StringsStringThinkingMedium1855
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420Strong Password CheckerStringMedium-
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2468Split Message Based on Limit
StringMedium2381https://youtu.be/oOWb_CQU5xo11/13/2022
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527*Word AbbreviationStringMedium-https://youtu.be/G-0QGOGea5M11/6/2022
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68Text JustificationStringMedium-https://youtu.be/6D7YFoQ4t0w2/5/2022
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418*Sentence Screen FittingStringMedium-https://youtu.be/0WD0M2GmVTw1/4/2022https://www.bilibili.com/video/BV16P4y1E75D/
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3681Maximum XOR of SubsequencesMathMediumhttps://youtu.be/M4UMLvrEh-A9/18/2025
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3068Find the Maximum Sum of Node ValuesOthersMedium2267https://youtu.be/CF7rTxasbow3/2/2024
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3092Most Frequent IDsSorted ContainerMedium1793N/A
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3703Remove K-Balanced SubstringsStackMediumN/A
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3676Count Bowl SubarraysStackMediumhttps://youtu.be/sfjXOXMRnQo9/7/2025
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3113Find the Number of Subarrays Where Boundary Elements Are MaximumStackMedium2046https://youtu.be/FViZk7J_SHE4/20/2024
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3609Minimum Moves to Reach Target in GridRecursiveThinkingHardhttps://youtu.be/rdhWlz01oyE7/6/2025
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3632*Subarrays with XOR at Least KTrieXORHard
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3372Maximize the Number of Target Nodes After Connecting Trees ITreeMedium
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3373Maximize the Number of Target Nodes After Connecting Trees IITreeReRootHard
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3367Maximize Sum of Weights after Edge RemovalsTreeGreedyHard
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3640Trionic Array IIEnumerationMediumhttps://youtu.be/PrcwRr7uebE8/4/2025
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3628Maximum Number of Subsequences After One InsertingEnumerationHardhttps://youtu.be/8I0lxrKfZHM8/1/2025
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3447Assign Elements to Groups with ConstraintsEnumerationMediumhttps://youtu.be/YCNZmqfCswE2/9/2025
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3641*Longest Semi-Repeating SubarrayTwo PointersHard
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3634Minimum Removals to Balance ArrayTwo PointersMedium
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3660Jump Game IXThinkingHardhttps://youtu.be/IMbwUOlC-FE8/25/2025
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3644Maximum K to Sort a PermutationThinkingHardhttps://youtu.be/-1CXTt9jWh08/11/2025
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3578Count Partitions With Max-Min Difference at Most KDequeDPHardhttps://youtu.be/zRxSvdFd8Mo6/10/2025
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3671Sum of Beautiful SubsequencesBITHardhttps://youtu.be/xFHXfJ1OlYY9/6/2025
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3714Longest Balanced Substring IIHashPrefixHard
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3448Count Substrings Divisible By Last DigitHashPrefixHardhttps://youtu.be/7VDPEki9qX42/9/2025
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3518Smallest Palindromic Rearrangement IICombinatoricsdigit coutingHardhttps://youtu.be/L-3r64EZoPw4/6/2025
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3463Check If Digits Are Equal in String After Operations IICombinatoricsHardhttps://youtu.be/grXNc-Tqgng2/24/2025
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3655XOR After Range Multiplication Queries IIDiff ArraySqrt DecompositionHardhttps://youtu.be/l1rTR3OBv4E8/20/2025
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3604Minimum Time to Reach Destination in Directed GraphGraphDijkstraMedium
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3594Minimum Time to Transport All IndividualsGraphDijkstraHardhttps://youtu.be/Z8n4D2nr5b46/23/2025
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3695Maximize Alternating Sum Using SwapsUnion FindMediumN/A
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3704Count No-Zero Pairs That Sum to Ndigit coutingRecursionMediumhttps://youtu.be/OS_1E9o4k1s10/5/2025
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3715Sum of Perfect Square AncestorsDFSPrimeMedium
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3669Balanced K-Factor DecompositionDFSMediumhttps://youtu.be/uI-HBJPRVhA9/1/2025
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3615Longest Palindromic Path in GraphDFSBit MaskHardhttps://youtu.be/VFEkS5GFhtY7/13/2025
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3593Minimum Increments to Equalize Leaf PathsDFSMedium
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3459Length of Longest V-Shaped Diagonal SegmentDFSMediumhttps://youtu.be/5CvMx5TKsX02/18/2025
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3691Maximum Total Subarray Value II11/10/2025Binary SearchRMQHardhttps://youtu.be/Fsng5ilHJFM9/29/2025
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3677Count Binary Palindromic Numbers11/9/2025Binary SearchMediumhttps://youtu.be/9zm0CqqvkOI9/7/2025
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3639Minimum Time to Activate String11/8/2025Binary SearchMedium
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3608Minimum Time for K Connected Components11/7/2025Binary SearchUnion FindMedium
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3600Maximize Spanning Tree Stability with Upgrades11/6/2025Binary SearchMSTHardhttps://youtu.be/JIevPW-LLDI6/30/2025
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3534Path Existence Queries in a Graph II11/5/2025Binary SearchBinary LiftingHard2507https://youtu.be/ffMSiTIgwMQ6/18/2025
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3464Maximize the Distance Between Points on a Square11/4/2025Binary SearchHard2805https://youtu.be/G_bJxy6Dc3k6/25/2025
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3449Maximize the Minimum Game Score11/3/2025Binary SearchHardhttps://youtu.be/N6aScon-ehY2/10/2025
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3399Smallest Substring With Identical Characters II11/2/2025Binary SearchHardhttps://youtu.be/AdT2F0x-uKo1/2/2025
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3097Shortest Subarray With OR at Least K II11/1/2025Binary SearchMedium1891https://youtu.be/be-rHbISs_E3/30/2024https://www.bilibili.com/video/BV1Rb421n7qb/
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3007Maximum Number That Sum of the Prices Is Less Than or Equal to K10/31/2025Binary Searchdigit coutingHard2258https://youtu.be/tw6jJCIq0lU1/14/2023https://www.bilibili.com/video/BV1ug4y1e7U7/
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2861Maximum Number of Alloys
10/30/2025Binary SearchMedium1981N/A
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SKIPPED10/29/2025
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2616Minimize the Maximum Difference of Pairs10/28/2025Binary SearchHard2155https://youtu.be/90Fyca_wwe84/23/2023https://www.bilibili.com/video/BV1Fm4y1v7q5/
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2565Subsequence With the Minimum Score10/27/2025Binary SearchThree PassHard2432https://youtu.be/vcjfoFhqzcI2/12/2023https://www.bilibili.com/video/BV1MR4y1v75D/
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2563Count the Number of Fair Pairs10/26/2025Binary SearchMedium1720https://youtu.be/MmegIOi5Rrw2/12/2023https://www.bilibili.com/video/BV1G14y1S7cf/
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2560House Robber IV10/25/2025Binary SearchHouse RobberHard2081https://youtu.be/_-nBUCSeU982/6/2023https://www.bilibili.com/video/BV13P411B7uQ/
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2528Maximize the Minimum Powered City10/24/2025Binary SearchMedium2235https://youtu.be/rn0yE0gC8Vw1/8/2023https://www.bilibili.com/video/BV1BV4y127ws/
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2513Minimize the Maximum of Two Arrays10/23/2025Binary SearchHard2302https://youtu.be/Nw7P4K7lyYk12/29/2022https://www.bilibili.com/video/BV1M8411Z7Qv/
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2517Maximum Tastiness of Candy Basket10/22/2025Binary SearchMedium2020https://youtu.be/ZKeWE8cu_7A12/27/2022https://www.bilibili.com/video/BV1Ym4y1i78E/
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2439Minimize Maximum of Array10/21/2025Binary SearchGreedyHard1965https://youtu.be/jBqKwUZeXkE10/16/2022https://www.bilibili.com/video/BV1eu411W75E/
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2302Count Subarrays With Score Less Than K10/20/2025Binary Search
Count Subarray By Element
Hard1808https://youtu.be/EsbBTfXpnPY6/11/2022https://www.bilibili.com/video/BV1JN4y1G7Tx/
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3700Number of ZigZag Arrays II10/19/2025DPMatrix MultiplicationHardhttps://youtu.be/bhMq96VOfAk9/28/2025
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3699Number of ZigZag Arrays I10/18/2025DPMediumN/A
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3686Number of Stable Subsequences10/17/2025DPMediumN/A
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3665Twisted Mirror Path Count10/16/2025DPMedium
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3670Maximum Product of Two Integers With No Common Bits10/15/2025DPBit MaskHardhttps://youtu.be/kZunhvnAuqY9/1/2025
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3661Maximum Walls Destroyed by Robots10/14/2025DPHardhttps://youtu.be/Dbmc23aEEn48/27/2025
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SKIPPED10/13/2025
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3654Minimum Sum After Divisible Sum Deletions10/12/2025DPPrefix SumHardhttps://youtu.be/gQO8_Vsa69c8/23/2025
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SKIPPED10/11/2025
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3599Partition Array to Minimize XOR10/10/2025DPPrefix SumMediumN/A
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3538Merge Operations for Minimum Travel Time10/9/2025DPHard
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3579Minimum Steps to Convert String with Operations10/8/2025DPGreedyHardhttps://youtu.be/A6pdvNWq7BM6/13/2025
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3685Subsequence Sum After Capping Elements10/7/2025DPKnapsack Hardhttps://youtu.be/G6xwQHlxRqQ9/14/2025
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SKIPPED10/6/2025
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3592Inverse Coin Change10/5/2025DPKnapsack Hardhttps://youtu.be/58MxA96KqwQ6/22/2025
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3489Zero Array Transformation IV10/4/2025DPKnapsack Hardhttps://youtu.be/ilvbOwh1o_U3/17/2025
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2902Count of Sub-Multisets With Bounded Sum10/3/2025DPKnapsack Hard2758https://youtu.be/7RyTk9IpU9810/16/2023https://www.bilibili.com/video/BV1xg4y1X7en/
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2585Number of Ways to Earn Points
10/2/2025DPKnapsackMedium1502https://youtu.be/a0_HXxT78eo3/6/2023https://www.bilibili.com/video/BV1U14y1C7Kr/
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2291*Maximum Profit From Trading Stocks10/1/2025DPKnapsackMedium-