1415D
XOR-gun
bitmasksbrute forceconstructive algorithms
Rating 2000
原题Codeforces 训练
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598E
Chocolate Bar
brute forcedp
Rating 2000
原题1716D
Chip Move
brute forcedpmath
Rating 2000
原题1426F
Number of Subsequences
combinatoricsdpstrings
Rating 2000
原题776D
The Door Problem
2-satdfs and similardsugraphs
Rating 2000
原题1951D
Buying Jewels
constructive algorithmsgreedymath
Rating 2000
原题1399E1
Weights Division (easy version)
data structuresdfs and similargreedytrees
Rating 2000
原题1344B
Monopole Magnets
constructive algorithmsdfs and similardsugraphs
Rating 2000
原题1354C2
Not So Simple Polygon Embedding
binary searchbrute forcegeometrymath
Rating 2000
原题1268B
Domino for Young
dpgreedymath
Rating 2000
原题1082E
Increasing Frequency
binary searchdpgreedy
Rating 2000
原题1513D
GCD and MST
constructive algorithmsdsugraphsgreedynumber theorysortings
Rating 2000
原题1244E
Minimizing Difference
binary searchconstructive algorithmsgreedysortingsternary searchtwo pointers
Rating 2000
原题1416B
Make Them Equal
constructive algorithmsgreedymath
Rating 2000
原题1454E
Number of Simple Paths
combinatoricsdfs and similargraphstrees
Rating 2000
原题1156C
Match Points
binary searchgreedysortingsternary searchtwo pointers
Rating 2000
原题475D
CGCDSSQ
brute forcedata structuresmath
Rating 2000
原题1359E
Modular Stability
combinatoricsmathnumber theory
Rating 2000
原题1388D
Captain Flint and Treasure
data structuresdfs and similargraphsgreedyimplementationtrees
Rating 2000
原题337D
Book of Evil
dfs and similardivide and conquerdptrees
Rating 2000
原题1294F
Three Paths on a Tree
dfs and similardpgreedytrees
Rating 2000
原题461B
Appleman and Tree
dfs and similardptrees
Rating 2000
原题938D
Buy a Ticket
data structuresgraphsshortest paths
Rating 2000
原题478D
Red-Green Towers
dp
Rating 2000
原题1674E
Breaking the Wall
binary searchbrute forceconstructive algorithmsgreedymath
Rating 2000
原题895C
Square Subsets
bitmaskscombinatoricsdpmath
Rating 2000
原题1363E
Tree Shuffling
dfs and similardpgreedytrees
Rating 2000
原题383C
Propagating tree
data structuresdfs and similartrees
Rating 2000
原题1763C
Another Array Problem
brute forceconstructive algorithmsgreedy
Rating 2000
原题999E
Reachability from the Capital
dfs and similargraphsgreedy
Rating 2000
原题514C
Watto and Mechanism
binary searchdata structureshashingstring suffix structuresstrings
Rating 2000
原题540C
Ice Cave
dfs and similar
Rating 2000
原题1244C
The Football Season
brute forcemathnumber theory
Rating 2000
原题1288D
Minimax Problem
binary searchbitmasksdp
Rating 2000
原题118E
Bertown roads
dfs and similargraphs
Rating 2000
原题920F
SUM and REPLACE
brute forcedata structuresdsunumber theory
Rating 2000
原题1349B
Orac and Medians
constructive algorithmsgreedymath
Rating 2000
原题1385E
Directing Edges
constructive algorithmsdfs and similargraphs
Rating 2000
原题1200E
Compress Words
brute forcehashingimplementationstring suffix structuresstrings
Rating 2000
原题1311D
Three Integers
brute forcemath
Rating 2000
原题1359D
Yet Another Yet Another Task
data structuresdpimplementationtwo pointers
Rating 2000
原题449B
Jzzhu and Cities
graphsgreedyshortest paths
Rating 2000
原题1370D
Odd-Even Subsequence
binary searchdpdsugreedyimplementation
Rating 2000
原题1132F
Clear the String
dp
Rating 2000
原题1438C
Engineer Artem
2-satchinese remainder theoremconstructive algorithmsfftflows
Rating 2000
原题242E
XOR on Segment
bitmasksdata structures
Rating 2000
原题432D
Prefixes and Suffixes
dpstring suffix structuresstringstwo pointers
Rating 2000
原题1366D
Two Divisors
constructive algorithmsmathnumber theory
Rating 2000
原题2B
The least round way
dpmath
Rating 2000
原题380C
Sereja and Brackets
data structuresschedules
Rating 2000
原题