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Problems
#
Name
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3913
631A
Interview
brute force
,
implementation
900
x9153
629B
Far Relative’s Problem
brute force
1100
x7954
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13147
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2654
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4296
626A
Robot Sequence
brute force
,
implementation
1000
x6156
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x963
614A
Link/Cut Tree
brute force
,
implementation
1500
x7402
613B
Skills
binary search
,
brute force
,
dp
,
greedy
,
sortings
,
two pointers
1900
x2174
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7048
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9808
602A
Two Bases
brute force
,
implementation
1100
x8372
599D
Spongebob and Squares
brute force
,
math
1900
x2533
598E
Chocolate Bar
brute force
,
dp
2000
x4647
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x673
593A
2Char
brute force
,
implementation
1200
x5680
585A
Gennady the Dentist
brute force
,
implementation
1800
x4117
584D
Dima and Lisa
brute force
,
math
,
number theory
1800
x8876
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3454
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84524
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5223
578B
"Or" Game
brute force
,
greedy
1700
x5123
575C
Party
bitmasks
,
brute force
,
graph matchings
2700
x211
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7630
568D
Sign Posts
brute force
,
geometry
,
math
2800
x298
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x5005
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10306
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3939
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10196
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3943
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7881
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9704
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12766
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1411
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4364
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5394
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3760
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16044
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27394
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19630
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36470
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8286
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9843
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2316
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17112
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17258
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x169268
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1500
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2407
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5764
538A
Cutting Banner
brute force
,
implementation
1400
x7078
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21717
535A
Tavas and Nafas
brute force
,
implementation
1000
x11860
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x853
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2076
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2272
526A
King of Thieves
brute force
,
implementation
1300
x4727
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2770
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x353
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7370
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20247
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1757
513B1
Permutations
brute force
1400
x3576
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5203
509A
Maximum in Table
brute force
,
implementation
800
x37378
508A
Pasha and Pixels
brute force
1100
x7797
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2033
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6607
497D
Gears
brute force
,
geometry
,
math
2900
x225
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7608
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5812
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16140
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6688
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1555
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2072
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8919
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6553
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2082
488A
Giga Tower
brute force
1100
x14073
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3672
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11524
485B
Valuable Resources
brute force
,
greedy
1300
x6456
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22296
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7558
479A
Expression
brute force
,
math
1000
x89429
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x206
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29230
475D
CGCDSSQ
brute force
,
data structures
,
math
2000
x4507
475C
Kamal-ol-molk's Painting
brute force
,
constructive algorithms
,
greedy
2100
x777
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8262
474C
Captain Marmot
brute force
,
geometry
2000
x3073
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3539
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36164
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34741
466B
Wonder Room
brute force
,
math
2000
x4617
464B
Restore Cube
brute force
,
geometry
2000
x1664
463E
Caisa and Tree
brute force
,
dfs and similar
,
math
,
number theory
,
trees
2100
x1387
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x25962
463A
Caisa and Sugar
brute force
,
implementation
1200
x9110
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brute force
combine-tags-by-or
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2-sat
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brute force
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data structures
dfs and similar
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dp
dsu
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games
geometry
graph matchings
graphs
greedy
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