cf/mirror
11,311/11,320 captured·📄 81 PDFs⊘ 0 skipped9 remaining100%

Problemset

91 problems · filtered by 2 tags

✓#Name✎Rating↕Solved↕
2229EDeconstruction Tree
combinatoricsdata structuresdpgraphstrees
21002k
2228E2Amanojaku and Sequence (Hard Version)
combinatoricsdata structuresimplementationmath
2500307
2205ESimons and Dividing the Rhythm
combinatoricsdata structuresdpdsumathstring suffix structuresstrings
21001.8k
2204FSum of Fractions
binary searchbrute forcecombinatoricsdata structuresgreedymathnumber theorytwo pointers
22001.3k
2199HSum of MEX
*specialcombinatoricsdata structuresdpmath
2300100
2184EExquisite Array
combinatoricsdata structuresdsusortings
18006.2k
2183D2Tree Coloring (Hard Version)
combinatoricsconstructive algorithmsdata structuresdfs and similargreedyimplementationtrees
21002.6k
2182F2Christmas Reindeer (hard version)
bitmasksbrute forcecombinatoricsdata structuresgreedymath
25001.1k
2182GShort Garland
combinatoricsdata structuresdfs and similardptrees
2800383
2170EBinary Strings and Blocks
combinatoricsdata structuresdp
21002.4k
2164F2Chain Prefix Rank (Hard Version)
binary searchcombinatoricsdata structuresdfs and similardpgraphsmathtrees
2900648
2147FExchange Queries
combinatoricsdata structuresgreedy
28001.2k
2144E2Looking at Towers (difficult version)
combinatoricsdata structuresdp
25001.5k
2143D1Inversion Graph Coloring (Easy Version)
combinatoricsdata structuresdpgreedytwo pointers
18006.8k
2143D2Inversion Graph Coloring (Hard Version)
binary searchcombinatoricsdata structuresdptwo pointers
22003k
2137FPrefix Maximum Invariance
binary searchcombinatoricsdata structuressortings
19004.2k
2077CBinary Subsequence Value Sum
combinatoricsdata structuresdpfftmathmatrices
23002.4k
2077EAnother Folding Strip
combinatoricsconstructive algorithmsdata structuresdivide and conquerdpgreedymath
2700627
2065HBro Thinks He's Him
combinatoricsdata structuresdivide and conquerdpmathmatrices
22002k
2064EMycraft Sand Sort
combinatoricsdata structuresdsugreedymathsortings
24001.5k
2063F1Counting Is Not Fun (Easy Version)
combinatoricsdata structuresdfs and similardpdsugraphshashingimplementationmathtrees
24001.6k
2063F2Counting Is Not Fun (Hard Version)
combinatoricsdata structuresdfs and similardsugraphsimplementationtrees
2700951
2056DUnique Median
binary searchbrute forcecombinatoricsdata structuresdivide and conquerdp
22003.7k
2045ENarrower Passageway
combinatoricsdata structures
2700302
2038FAlternative Platforms
combinatoricsdata structuresfftmathsortings
2500492
2037GNatlan Exploring
bitmaskscombinatoricsdata structuresdpmathnumber theory
20003.9k
2030EMEXimize the Score
combinatoricsdata structuresdpgreedyimplementationmath
22002k
2022E2Billetes MX (Hard Version)
binary searchcombinatoricsdata structuresdsugraphs
2600730
2000EPhotoshoot for Gorillas
combinatoricsdata structuresgreedymath
140016.5k
1996EDecode
combinatoricsdata structuresimplementationmath
160012.9k
1986G1Permutation Problem (Simple Version)
binary searchbrute forcecombinatoricsdata structuresmathnumber theory
22002k
1976DInvertible Bracket Sequences
binary searchcombinatoricsdata structuresdivide and conquerimplementationtwo pointers
20005.9k
1976ESplittable Permutations
combinatoricsdata structuresdfs and similargreedymathtrees
25001.3k
1974CBeautiful Triple Pairs
combinatoricsdata structures
140019.3k
1967CFenwick Tree
bitmasksbrute forcecombinatoricsdata structuresdpmathtrees
23002.3k
1929FSasha and the Wedding Binary Search Tree
brute forcecombinatoricsdata structuresdfs and similarmathtrees
23002.4k
1928FDigital Patterns
combinatoricsdata structuresimplementationmath
2900479
1917BErase First or Second Letter
brute forcecombinatoricsdata structuresdpstrings
110038.7k
1917DYet Another Inversions Problem
combinatoricsdata structuresdpimplementationmathnumber theory
23002.1k
1914G2Light Bulbs (Hard Version)
combinatoricsdata structuresdfs and similardpgraphshashing
23001.9k
1886DMonocarp and the Set
combinatoricsdata structuresmath
21004.3k
1850GThe Morning Star
combinatoricsdata structuresgeometryimplementationmathsortings
150015.8k
1844HMultiple of Three Cycles
combinatoricsdata structuresdpdsumath
3400305
1833FIra and Flamenco
combinatoricsconstructive algorithmsdata structuresimplementationmathsortingstwo pointers
170010.6k
1811G2Vlad and the Nice Paths (hard version)
binary searchcombinatoricsdata structuresdpmathtwo pointers
22002.2k
1780FThree Chairs
bitmasksbrute forcecombinatoricsdata structuresdpnumber theorysortings
23002k
1774GSegment Covering
brute forcecombinatoricsconstructive algorithmsdata structuresdptrees
3200692
1743GAntifibonacci Cut
bitmaskscombinatoricsconstructive algorithmsdata structuresdphashingmath
3000381
1735DMeta-set
brute forcecombinatoricsdata structureshashingmath
17007.1k
1730EMaximums and Minimums
combinatoricsdata structuresdivide and conquernumber theory
2700815
1726GA Certain Magical Party
combinatoricsdata structuresgreedysortings
3300444
1725EElectrical Efficiency
combinatoricsdata structuresdpmathnumber theorytrees
2500640
1715CMonoblock
combinatoricsdata structuresimplementationmath
170010.6k
1705EMark and Professor Koro
binary searchbitmasksbrute forcecombinatoricsdata structuresgreedy
23002.5k
1701FPoints
combinatoricsdata structuresimplementationmathmatrices
25001.2k
1648AWeird Sum
combinatoricsdata structuresgeometrymathmatricessortings
140019.8k
1648CTyler and Strings
combinatoricsdata structuresimplementation
19003.4k
1644EExpand the Path
brute forcecombinatoricsdata structuresimplementationmath
19003.5k
1616HKeep XOR Low
bitmaskscombinatoricsdata structuresdivide and conquerdpmath
30001.4k
1598DTraining Session
combinatoricsdata structuresgeometryimplementationmath
170010.7k
1598EStaircases
brute forcecombinatoricsdata structuresdfs and similardpimplementationmath
21002.5k
1558DTop-Notch Insertions
combinatoricsdata structures
26001.2k
1488HBuild From Suffixes
*specialcombinatoricsdata structures
280074
1486FPairs of Paths
combinatoricsdata structuresdfs and similardptrees
2600875
1485FCopy or Prefix Sum
combinatoricsdata structuresdpsortings
24002.4k
1470EStrange Permutation
binary searchcombinatoricsdata structuresdpgraphsimplementationtwo pointers
3200981
1442BIdentify the Operations
combinatoricsdata structuresdsugreedyimplementation
18005.4k
1420DRescue Nibel!
combinatoricsdata structuressortings
18008.4k
1400DZigzags
brute forcecombinatoricsdata structuresmathtwo pointers
190011.5k
1383EStrange Operation
combinatoricsdata structuresdp
28001.1k
1327FAND Segments
bitmaskscombinatoricsdata structuresdptwo pointers
25002.1k
1284BNew Year and Ascent Sequence
binary searchcombinatoricsdata structuresdpimplementationsortings
140011.6k
1276CBeautiful Rectangle
brute forcecombinatoricsconstructive algorithmsdata structuresgreedymath
23001.8k
1197ECulture Code
binary searchcombinatoricsdata structuresdpshortest pathssortings
23001.9k
1167ERange Deleting
binary searchcombinatoricsdata structurestwo pointers
21003k
1167FScalar Queries
combinatoricsdata structuresmathsortings
23001.9k
1151ENumber of Components
combinatoricsdata structuresdpmath
21003.8k
1085GBeautiful Matrix
combinatoricsdata structuresdp
29001k
1037FMaximum Reduction
combinatoricsdata structuresmath
25001.3k
1028DOrder book
combinatoricsdata structuresgreedy
21001.8k
1007AReorder the Array
combinatoricsdata structuresmathsortingstwo pointers
130013.2k
981HK Paths
combinatoricsdata structuresdpfftmath
3100453
875DHigh Cry
binary searchbitmaskscombinatoricsdata structuresdivide and conquer
22002.6k
815DKaren and Cards
binary searchcombinatoricsdata structuresgeometry
2800856
689EMike and Geometry Problem
combinatoricsdata structuresdpgeometryimplementation
20002.3k
629EFamil Door and Roads
combinatoricsdata structuresdfs and similardpprobabilitiestrees
23001.2k
577BModulo Sum
combinatoricsdata structuresdptwo pointers
190015.6k
552DVanya and Triangles
brute forcecombinatoricsdata structuresgeometrymathsortings
19004.9k
364AMatrix
combinatoricsdata structuresimplementation
16005k
283ECow Tennis Tournament
combinatoricsdata structuresmath
2800948
145DLucky Pair
combinatoricsdata structuresimplementation
2900301

showing 1–91 of 91