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Before contest
Codeforces Round (Div. 3)
6 days
→ Filter Problems
Difficulty:
—
implementation
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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Problems
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Status
Standings
Custom test
Problems
#
Name
1154C
Gourmet Cat
implementation
,
math
1400
x10285
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x15014
1150B
Tiling Challenge
greedy
,
implementation
900
x10829
1150A
Stock Arbitraging
greedy
,
implementation
800
x11650
1149C
Tree Generator™
data structures
,
implementation
,
trees
2700
x1183
1149B
Three Religions
dp
,
implementation
,
strings
2200
x1876
1146E
Hot is Cold
bitmasks
,
data structures
,
divide and conquer
,
implementation
2400
x844
1146B
Hate "A"
implementation
,
strings
1100
x8424
1146A
Love "A"
implementation
,
strings
800
x21524
1145D
Pigeon d'Or
implementation
x1142
1145A
Thanos Sort
implementation
x8529
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x16832
1144A
Diverse Strings
implementation
,
strings
800
x18913
1143A
The Doors
implementation
800
x13169
1141D
Colored Boots
greedy
,
implementation
1500
x8408
1141B
Maximal Continuous Rest
implementation
900
x20819
1141A
Game 23
implementation
,
math
1000
x30175
1140B
Good String
implementation
,
strings
1200
x11165
1140A
Detective Book
implementation
1000
x12091
1139B
Chocolates
greedy
,
implementation
1000
x15831
1139A
Even Substrings
implementation
,
strings
800
x16498
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x17566
1137C
Museums Tour
dp
,
graphs
,
implementation
2500
x1164
1137A
Skyscrapers
implementation
,
sortings
1600
x4438
1136A
Nastya Is Reading a Book
implementation
800
x16163
1133A
Middle of the Contest
implementation
1000
x16655
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x9527
1131B
Draw!
greedy
,
implementation
1400
x9637
1130A
Be Positive
implementation
800
x11494
1121C
System Testing
implementation
1600
x1945
1121B
Mike and Children
brute force
,
implementation
1200
x8683
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7122
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x409
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1623
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x433
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6624
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10504
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4067
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5681
1118B
Tanya and Candies
implementation
1200
x11881
1117A
Best Subsegment
implementation
,
math
1100
x10942
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7276
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18359
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6197
1111A
Superhero Transformation
implementation
,
strings
1000
x16641
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x249
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8399
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2133
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4434
1108A
Two distinct points
implementation
800
x21328
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3686
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14346
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6700
1106A
Lunar New Year and Cross Counting
implementation
800
x12292
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x4005
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9822
1105A
Salem and Sticks
brute force
,
implementation
1100
x10818
1104B
Game with string
data structures
,
implementation
,
math
1200
x14575
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15186
1103A
Grid game
constructive algorithms
,
implementation
1400
x9635
1101E
Polycarp's New Job
implementation
1500
x7743
1101B
Accordion
greedy
,
implementation
1300
x10393
1100B
Build a Contest
data structures
,
implementation
1300
x10972
1100A
Roman and Browser
implementation
1000
x10065
1099C
Postcard
constructive algorithms
,
implementation
1200
x9452
1099A
Snowball
implementation
800
x12794
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x219
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8342
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37512
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18471
1095E
Almost Regular Bracket Sequence
implementation
1900
x4039
1095D
Circular Dance
implementation
1600
x7436
1095B
Array Stabilization
implementation
900
x21355
1095A
Repeating Cipher
implementation
800
x29963
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2874
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4515
1092A
Uniform String
implementation
800
x16019
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x979
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10567
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17362
1090M
The Pleasant Walk
implementation
1000
x6042
1090G
Combostone
games
,
implementation
2500
x105
1089J
JS Minification
greedy
,
implementation
3200
x121
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2785
1088B
Ehab and subtraction
implementation
,
sortings
1000
x12427
1085E
Vasya and Templates
greedy
,
implementation
,
strings
2300
x864
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5316
1085C
Connect Three
implementation
,
math
1600
x5377
1085A
Right-Left Cipher
implementation
,
strings
800
x12081
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7713
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x7722
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7832
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x230
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3603
1082A
Vasya and Book
implementation
,
math
1200
x8457
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x454
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4406
1080D
Olya and magical square
constructive algorithms
,
implementation
,
math
2000
x1525
1080C
Masha and two friends
implementation
1500
x4000
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12642
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