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data structures
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3493
895E
Eyes Closed
data structures
,
probabilities
2300
x1125
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1137
893F
Subtree Minimum Query
data structures
,
trees
2300
x2010
893D
Credit Card
data structures
,
dp
,
greedy
,
implementation
1900
x3074
891C
Envy
data structures
,
dsu
,
graphs
2300
x2421
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x4597
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x481
884D
Boxes And Balls
data structures
,
greedy
2300
x2041
883L
Berland.Taxi
data structures
2500
x233
879B
Table Tennis
data structures
,
implementation
1200
x12490
878C
Tournament
data structures
,
graphs
2700
x928
878B
Teams Formation
data structures
,
implementation
2300
x1072
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1831
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x4613
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x4412
875E
Delivery Club
binary search
,
data structures
,
dp
2600
x924
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x2287
873E
Awards For Contestants
brute force
,
data structures
,
dp
2300
x702
870F
Paths
data structures
,
number theory
2700
x622
869E
The Untended Antiquity
data structures
,
hashing
2400
x1819
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x5772
863E
Turn Off The TV
data structures
,
sortings
2000
x3186
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3298
862F
Mahmoud and Ehab and the final stage
data structures
,
strings
2900
x210
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x1667
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x444
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3855
855F
Nagini
binary search
,
data structures
3100
x459
855B
Marvolo Gaunt's Ring
brute force
,
data structures
,
dp
1500
x8742
853E
Lada Malina
data structures
,
geometry
3400
x66
853C
Boredom
data structures
2100
x1512
848C
Goodbye Souvenir
data structures
,
divide and conquer
2600
x1378
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1906
847D
Dog Show
constructive algorithms
,
data structures
,
greedy
2200
x1217
847B
Preparing for Merge Sort
binary search
,
data structures
1600
x5059
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2284
846D
Monitor
binary search
,
data structures
1900
x2535
846C
Four Segments
brute force
,
data structures
,
dp
1800
x2691
845E
Fire in the City
binary search
,
data structures
2400
x604
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2393
845C
Two TVs
data structures
,
greedy
,
sortings
1500
x8806
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3705
840D
Destiny
data structures
,
probabilities
2500
x3071
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2484
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x835
837G
Functions On The Segments
data structures
2500
x696
834B
The Festive Evening
data structures
,
implementation
1100
x8827
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x225
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x402
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x5086
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1206
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2848
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x408
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x1179
827C
DNA Evolution
data structures
,
strings
2100
x1663
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x4052
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x3494
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6973
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1707
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x2286
818D
Multicolored Cars
data structures
,
implementation
1700
x3535
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2633
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2959
817D
Imbalanced Array
data structures
,
divide and conquer
,
dsu
,
sortings
1900
x4840
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x18422
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x616
813F
Bipartite Checking
data structures
,
dsu
,
graphs
2500
x1372
813E
Army Creation
binary search
,
data structures
2200
x2455
811E
Vladik and Entertaining Flags
data structures
,
dsu
,
graphs
2600
x877
809D
Hitchhiking in the Baltic States
data structures
,
dp
2900
x860
808D
Array Division
binary search
,
data structures
,
implementation
1900
x7032
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x7864
803G
Periodic RMQ Problem
data structures
2300
x1605
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x973
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1141
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x116
799F
Beautiful fountains rows
data structures
3500
x450
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x937
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3782
799B
T-shirt buying
data structures
,
implementation
1400
x8935
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x492
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1230
797E
Array Queries
brute force
,
data structures
,
dp
2000
x4500
797D
Broken BST
data structures
,
dfs and similar
2100
x1840
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6809
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x181
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x3060
794F
Leha and security system
data structures
2800
x833
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x387
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x565
792F
Mages and Monsters
data structures
,
geometry
3100
x212
788E
New task
data structures
2900
x341
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x633
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x142
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2917
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x6226
785E
Anton and Permutation
brute force
,
data structures
2200
x1934
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x662
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x4093
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