1207D
Number Of Permutations
combinatorics
Rating 1800
原题Codeforces 训练
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1720D1
Xor-Subsequence (easy version)
bitmasksbrute forcedpstringstreestwo pointers
Rating 1800
原题2008G
Sakurako's Task
binary searchgreedymathnumber theory
Rating 1800
原题1118F1
Tree Cutting (Easy Version)
dfs and similartrees
Rating 1800
原题1304D
Shortest and Longest LIS
constructive algorithmsgraphsgreedytwo pointers
Rating 1800
原题2148F
Gravity Falls
greedyimplementationsortings
Rating 1800
原题2071D1
Infinite Sequence (Easy Version)
bitmasksbrute forcedpimplementationmath
Rating 1800
原题1187C
Vasya And Array
constructive algorithmsgreedyimplementation
Rating 1800
原题1190B
Tokitsukaze, CSL and Stone Game
games
Rating 1800
原题519D
A and B and Interesting Substrings
data structuresdptwo pointers
Rating 1800
原题1867D
Cyclic Operations
brute forceconstructive algorithmsdfs and similargraphsgreedyimplementation
Rating 1800
原题687B
Remainders Game
chinese remainder theoremmathnumber theory
Rating 1800
原题2092D
Mishkin Energizer
brute forceconstructive algorithmsgreedyimplementationstrings
Rating 1800
原题2145D
Inversion Value of a Permutation
constructive algorithmsdfs and similardp
Rating 1800
原题1154E
Two Teams
data structuresimplementationsortings
Rating 1800
原题1968F
Equal XOR Segments
binary searchdata structures
Rating 1800
原题1635D
Infinite Set
bitmasksdpmathmatricesnumber theorystrings
Rating 1800
原题1734D
Slime Escape
data structuresdpgreedytwo pointers
Rating 1800
原题1152C
Neko does Maths
brute forcemathnumber theory
Rating 1800
原题1394A
Boboniu Chats with Du
dpgreedysortingstwo pointers
Rating 1800
原题600C
Make Palindrome
constructive algorithmsgreedystrings
Rating 1800
原题2069D
Palindrome Shuffle
binary searchgreedyhashingstringstwo pointers
Rating 1800
原题1705D
Mark and Lightbulbs
combinatoricsconstructive algorithmsgreedymathsortings
Rating 1800
原题1793D
Moscow Gorillas
binary searchdpgreedyimplementationmathtwo pointers
Rating 1800
原题1848C
Vika and Price Tags
mathnumber theory
Rating 1800
原题2033F
Kosuke's Sloth
brute forcemathnumber theory
Rating 1800
原题2101B
Quartet Swapping
brute forcedata structuresdivide and conquergreedysortings
Rating 1800
原题2144D
Price Tags
brute forcedpmath
Rating 1800
原题1620C
BA-String
brute forcedpgreedyimplementationmath
Rating 1800
原题1290B
Irreducible Anagrams
binary searchconstructive algorithmsdata structuresstringstwo pointers
Rating 1800
原题1648B
Integral Array
brute forceconstructive algorithmsdata structuresmath
Rating 1800
原题1809D
Binary String Sorting
constructive algorithmsgreedy
Rating 1800
原题1678B2
Tokitsukaze and Good 01-String (hard version)
dpgreedyimplementation
Rating 1800
原题1611F
ATM and Students
binary searchdata structurestwo pointers
Rating 1800
原题1283E
New Year Parties
dpgreedy
Rating 1800
原题1941F
Rudolf and Imbalance
binary searchgreedysortingstwo pointers
Rating 1800
原题1042D
Petya and Array
data structuresdivide and conquertwo pointers
Rating 1800
原题2020D
Connect the Dots
brute forcedpdsugraphsmathtrees
Rating 1800
原题1750D
Count GCD
combinatoricsmathnumber theory
Rating 1800
原题1316C
Primitive Primes
constructive algorithmsmathternary search
Rating 1800
原题1872F
Selling a Menagerie
dfs and similardsugraphsimplementationmath
Rating 1800
原题1691D
Max GEQ Sum
binary searchconstructive algorithmsdata structuresdivide and conquerimplementationtwo pointers
Rating 1800
原题1801B
Buying gifts
data structuresgreedysortings
Rating 1800
原题1862F
Magic Will Save the World
binary searchbitmasksbrute forcedp
Rating 1800
原题1851F
Lisa and the Martians
bitmasksgreedymathstringstrees
Rating 1800
原题61D
Eternal Victory
dfs and similargraphsgreedyshortest pathstrees
Rating 1800
原题1721D
Maximum AND
bitmasksdfs and similardivide and conquergreedysortings
Rating 1800
原题1334D
Minimum Euler Cycle
constructive algorithmsgraphsgreedyimplementation
Rating 1800
原题2043D
Problem about GCD
brute forceflowsmathnumber theory
Rating 1800
原题482B
Interesting Array
constructive algorithmsdata structurestrees
Rating 1800
原题