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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
568D
Sign Posts
brute force
,
geometry
,
math
2800
x298
568C
New Language
2-sat
,
greedy
2600
x774
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2219
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4999
567F
Mausoleum
dp
2400
x565
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1640
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4646
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9275
567B
Berland National Library
implementation
1300
x8335
567A
Lineland Mail
greedy
,
implementation
900
x30587
566G
Max and Min
geometry
2500
x333
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3523
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x600
566D
Restructuring Company
data structures
,
dsu
1900
x3096
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x694
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x259
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x869
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7832
560A
Currency System in Geraldion
implementation
,
sortings
1000
x16829
559E
Gerald and Path
dp
,
sortings
3000
x856
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x423
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6141
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10361
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10281
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5585
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1109
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3917
558B
Amr and The Large Array
implementation
1300
x7754
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10166
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1055
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2135
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3939
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7078
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8201
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7876
556A
Case of the Zeros and Ones
greedy
900
x37920
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2191
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x857
555C
Case of Chocolate
data structures
2200
x1945
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3686
555A
Case of Matryoshkas
implementation
1500
x6488
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9683
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12717
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x535
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x980
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1734
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2094
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8373
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1409
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4355
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5385
552B
Vanya and Books
implementation
,
math
1200
x15191
552A
Vanya and Table
implementation
,
math
1000
x9328
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1650
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1723
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3443
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3759
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16008
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1376
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3242
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27256
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19461
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36276
549H
Degenerate Matrix
binary search
,
math
2100
x1785
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2393
549F
Yura and Developers
data structures
,
divide and conquer
2800
x849
549E
Sasha Circle
geometry
,
math
2700
x145
549D
Haar Features
greedy
,
implementation
1900
x2124
549C
The Game Of Parity
games
2200
x1717
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1475
549A
Face Detection
implementation
,
strings
900
x9348
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8270
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9833
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1935
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2419
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2703
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8218
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2310
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3467
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11225
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17069
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17179
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x167657
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4388
545D
Queue
greedy
,
implementation
,
sortings
1300
x24066
545C
Woodcutters
dp
,
greedy
1500
x26222
545B
Equidistant String
greedy
1100
x11423
545A
Toy Cars
implementation
900
x11419
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7817
544A
Set of Strings
implementation
,
strings
1100
x7726
543E
Listening to Music
constructive algorithms
,
data structures
3200
x276
543D
Road Improvement
dp
,
trees
2300
x2536
543C
Remembering Strings
bitmasks
,
dp
2500
x1351
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3830
543A
Writing Code
dp
1800
x7673
542F
Quest
dp
,
greedy
2100
x734
542E
Playing on Graph
graphs
,
shortest paths
2600
x807
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x496
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1096
542B
Duck Hunt
data structures
3100
x125
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