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1237B
Balanced Tunnel
data structuressortingstwo pointers
1999E
Triple Operations
dpimplementationmath
508B
Anton and currency you all know
greedymathstrings
1498B
Box Fitting
binary searchbitmasksdata structuresgreedy
1555C
Coin Rows
brute forceconstructive algorithmsdpimplementation
1955C
Inhabitant of the Deep Sea
greedyimplementationmath
1203C
Common Divisors
implementationmath
1676G
White-Black Balanced Subtrees
dfs and similardpgraphstrees
1850F
We Were Both Children
brute forceimplementationmathnumber theory
1367C
Social Distance
constructive algorithmsgreedymath
1846E1
Rudolf and Snowflakes (simple version)
brute forceimplementationmath
862B
Mahmoud and Ehab and the bipartiteness
dfs and similargraphstrees
1612C
Chat Ban
binary searchmath
1364B
Most socially-distanced subsequence
greedytwo pointers
1401C
Mere Array
constructive algorithmsmathnumber theorysortings
1360E
Polygon
dpgraphsimplementationshortest paths
1879C
Make it Alternating
combinatoricsdpgreedy
893C
Rumor
dfs and similargraphsgreedy
1366B
Shuffle
mathtwo pointers
1365B
Trouble Sort
constructive algorithmsimplementation
450B
Jzzhu and Sequences
implementationmath
1335D
Anti-Sudoku
constructive algorithmsimplementation
1881D
Divide and Equalize
mathnumber theory
545D
Queue
greedyimplementationsortings
1352D
Alice, Bob and Candies
implementation
1470A
Strange Birthday Party
binary searchdpgreedysortingstwo pointers
1669H
Maximal AND
bitmasksgreedymath
1857D
Strong Vertices
mathsortingstrees
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary searchdata structuresdpgreedysortings
1285B
Just Eat It!
dpgreedyimplementation
1931D
Divisible Pairs
combinatoricsmathnumber theory
1328B
K-th Beautiful String
binary searchbrute forcecombinatoricsimplementationmath
276B
Little Girl and Game
gamesgreedy
1927D
Find the Different Ones!
binary searchbrute forcedata structuresdpdsugreedytwo pointers
1538C
Number of Pairs
binary searchdata structuresmathtwo pointers
1915E
Romantic Glasses
data structuresgreedymath
1372B
Omkar and Last Class of Math
greedymathnumber theory
476B
Dreamoon and WiFi
bitmasksbrute forcecombinatoricsdpmathprobabilities
600B
Queries about less or equal elements
binary searchdata structuressortingstwo pointers
478B
Random Teams
combinatoricsconstructive algorithmsgreedymath
1360D
Buying Shovels
mathnumber theory
1294C
Product of Three Numbers
greedymathnumber theory
459B
Pashmak and Flowers
combinatoricsimplementationsortings
451B
Sort the Array
implementationsortings
189A
Cut Ribbon
brute forcedp
230B
T-primes
binary searchimplementationmathnumber theory
4C
Registration System
data structureshashingimplementation