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共 810 道題目含解題說明

AllEasyMediumHard
#題目難度RatingTopics
1425Constrained Subsequence SumHard2032
arraydynamic-programmingqueue+3
1431Kids With the Greatest Number of CandiesEasy1118
arraygreedy
1438Longest Continuous Subarray With Absolute Diff Less Than or Equal to LimitMedium1672
arrayqueuesliding-window+3
1443Minimum Time to Collect All Apples in a TreeMedium1683
hash-tabletreedepth-first-search+1
1448Count Good Nodes in Binary TreeMedium1438
treedepth-first-searchbreadth-first-search+1
1456Maximum Number of Vowels in a Substring of Given LengthMedium1263
stringsliding-window
1461Check If a String Contains All Binary Codes of Size KMedium1504
hash-tablestringbit-manipulation+2
1462Course Schedule IVMedium1693
depth-first-searchbreadth-first-searchgraph+1
1466Reorder Routes to Make All Paths Lead to the City ZeroMedium1634
graphdfsbfs
1467Probability of a Two Boxes Having The Same Number of Distinct BallsHard2357
arraymathdynamic-programming+3
1470Shuffle the ArrayEasy1121
array
1472Design Browser HistoryMedium1454
arraylinked-liststack+3
1475Final Prices With a Special Discount in a ShopEasy1225
arraystackmonotonic-stack
1480Running Sum of 1d ArrayEasy1133
arrayprefix-sum
1486XOR Operation in an ArrayEasy1176
bit-manipulationmath
1489Find Critical and Pseudo-Critical Edges in Minimum Spanning TreeHard2572
union-findgraphsorting+2
1493Longest Subarray of 1's After Deleting One ElementMedium1423
sliding-windowarraydynamic-programming
1498Number of Subsequences That Satisfy the Given Sum ConditionMedium2276
arraytwo-pointersbinary-search+1
1499Max Value of EquationHard2456
arrayqueuesliding-window+2
1505Minimum Possible Integer After at Most K Adjacent Swaps On DigitsHard2337
stringgreedybinary-indexed-tree+1
1514Path with Maximum ProbabilityMedium1846
arraygraphheap-priority-queue+1
1515Best Position for a Service CentreHard2157
arraymathgeometry+1
1523Count Odd Numbers in an Interval RangeEasy1209
math
1545Find Kth Bit in Nth Binary StringMedium1479
stringrecursionsimulation
1547Minimum Cost to Cut a StickHard2116
arraydynamic-programmingsorting
1553Minimum Number of Days to Eat N OrangesHard2048
dynamic-programmingmemoization
1557Minimum Number of Vertices to Reach All NodesMedium1512
graph
1569Number of Ways to Reorder Array to Get Same BSTHard2288
arraymathdivide-and-conquer+7
1572Matrix Diagonal SumEasy1280
arraymatrix
1579Remove Max Number of Edges to Keep Graph Fully TraversableHard2132
union-findgraph
1584Min Cost to Connect All PointsMedium1605
arrayunion-findgraph+1
1591Strange Printer IIHard2291
arraygraphtopological-sort+1
1603Design Parking SystemEasy1324
designsimulationcounting
1606Find Servers That Handled Most Number of RequestsHard2276
arrayheap-priority-queuesimulation+1
1609Even Odd TreeMedium1749
treebfsbinary-tree
1622Fancy SequenceHard2476
mathdesignsegment-tree
1626Best Team With No ConflictsMedium2027
arraydynamic-programmingsorting
1627Graph Connectivity With ThresholdHard2221
arraymathunion-find+1
1631Path With Minimum EffortMedium1947
arraybinary-searchdepth-first-search+4
1632Rank Transform of a MatrixHard2530
arrayunion-findgraph+3
1639Number of Ways to Form a Target String Given a DictionaryHard2082
arraystringdynamic-programming
1642Furthest Building You Can ReachMedium1536
arraygreedyheap-priority-queue
1647Minimum Deletions to Make Character Frequencies UniqueMedium1510
hash-tablestringgreedy+1
1649Create Sorted Array through InstructionsHard2208
arraybinary-searchdivide-and-conquer+4
1650Lowest Common Ancestor of a Binary Tree IIIMedium—
treehash-tabletwo-pointers
1655Distribute Repeating IntegersHard2307
arrayhash-tabledynamic-programming+4
1656Design an Ordered StreamEasy1419
arrayhash-tabledesign+1
1657Determine if Two Strings Are CloseMedium1530
hash-tablestringsorting+1
1658Minimum Operations to Reduce X to ZeroMedium1817
arrayhash-tablebinary-search+3
1670Design Front Middle Back QueueMedium1610
arraylinked-listdesign+3
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