451D
Count Good Substrings
math
Rating 2000
原题Codeforces 训练
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1536D
Omkar and Medians
data structuresgreedyimplementation
Rating 2000
原题1872G
Replace With Product
brute forcegreedymath
Rating 2000
原题1416C
XOR Inverse
bitmasksdata structuresdivide and conquerdpgreedymathsortingsstrings
Rating 2000
原题2063D
Game With Triangles
binary searchbrute forcedata structuresgeometrygreedyimplementationmathternary search
Rating 2000
原题1712D
Empty Graph
binary searchconstructive algorithmsdata structuresgreedyshortest paths
Rating 2000
原题2140D
A Cruel Segment's Thesis
data structuresgreedysortings
Rating 2000
原题1487E
Cheap Dinner
brute forcedata structuresgraphsgreedyimplementationsortingstwo pointers
Rating 2000
原题1923E
Count Paths
data structuresdfs and similardpdsugraphstrees
Rating 2000
原题2014F
Sheriff's Defense
dfs and similardpgreedytrees
Rating 2000
原题578C
Weakness and Poorness
ternary search
Rating 2000
原题466B
Wonder Room
brute forcemath
Rating 2000
原题1804D
Accommodation
brute forcedpgreedyimplementation
Rating 2000
原题1841D
Pairs of Segments
data structuresgreedysortingstwo pointers
Rating 2000
原题1783D
Different Arrays
brute forcedpimplementation
Rating 2000
原题1657D
For Gamers. By Gamers.
binary searchbrute forcegreedymathsortings
Rating 2000
原题1753C
Wish I Knew How to Sort
dpmathprobabilities
Rating 2000
原题1632D
New Year Concert
binary searchdata structuresgreedymathnumber theorytwo pointers
Rating 2000
原题468B
Two Sets
2-satdfs and similardsugraph matchingsgreedy
Rating 2000
原题2085D
Serval and Kaitenzushi Buffet
data structuresgraph matchingsgreedy
Rating 2000
原题1900D
Small GCD
bitmasksbrute forcedpmathnumber theory
Rating 2000
原题1183E
Subsequences (easy version)
dpgraphsimplementationshortest paths
Rating 2000
原题453B
Little Pony and Harmony Chest
bitmasksbrute forcedp
Rating 2000
原题1101D
GCD Counting
data structuresdfs and similardpnumber theorytrees
Rating 2000
原题1296E2
String Coloring (hard version)
data structuresdp
Rating 2000
原题2057D
Gifts Order
data structuresgreedyimplementationmathmatrices
Rating 2000
原题514D
R2D2 and Droid Army
binary searchdata structurestwo pointers
Rating 2000
原题1796D
Maximum Subarray
data structuresdpgreedytwo pointers
Rating 2000
原题1857G
Counting Graphs
combinatoricsdivide and conquerdsugraphsgreedysortingstrees
Rating 2000
原题2114F
Small Operations
binary searchbrute forcedfs and similardpmathnumber theorysortings
Rating 2000
原题1616D
Keep the Average High
dpgreedymath
Rating 2000
原题1994E
Wooden Game
bitmasksgreedymathtrees
Rating 2000
原题877E
Danil and a Part-time Job
bitmasksdata structurestrees
Rating 2000
原题2154C2
No Cost Too Great (Hard Version)
greedymathnumber theory
Rating 2000
原题545E
Paths and Trees
graphsgreedyshortest paths
Rating 2000
原题2096D
Wonderful Lightbulbs
combinatoricsconstructive algorithmsmath
Rating 2000
原题797E
Array Queries
brute forcedata structuresdp
Rating 2000
原题359D
Pair of Numbers
binary searchbrute forcedata structuresmathtwo pointers
Rating 2000
原题1391D
505
bitmasksbrute forceconstructive algorithmsdpgreedyimplementation
Rating 2000
原题710E
Generate a String
dfs and similardp
Rating 2000
原题1976D
Invertible Bracket Sequences
binary searchcombinatoricsdata structuresdivide and conquerimplementationtwo pointers
Rating 2000
原题1830B
The BOSS Can Count Pairs
brute forcemath
Rating 2000
原题2075D
Equalization
bitmasksbrute forcedpgraphsmath
Rating 2000
原题1613E
Crazy Robot
dfs and similargraphs
Rating 2000
原题1304E
1-Trees and Queries
data structuresdfs and similarshortest pathstrees
Rating 2000
原题1702G2
Passable Paths (hard version)
data structuresdfs and similartrees
Rating 2000
原题1974G
Money Buys Less Happiness Now
data structuresgreedysortings
Rating 2000
原题1988D
The Omnipotent Monster Killer
brute forcedfs and similardptrees
Rating 2000
原题1427C
The Hard Work of Paparazzi
dp
Rating 2000
原题1379C
Choosing flowers
binary searchbrute forcedata structuresdfs and similardpgreedysortingstwo pointers
Rating 2000
原题