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Before contest
Codeforces Round 941 (Div. 1)
02:29:52
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
02:29:52
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→ Filter Problems
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dp
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
#
Name
1769D1
Игра в Девятку I
*special problem
,
brute force
,
dp
1800
x367
95B
Lucky Numbers
dp
,
greedy
1800
x1174
182E
Wooden Fence
dp
1800
x1423
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1629
234F
Fence
dp
1800
x1712
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1714
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1719
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1754
49D
Game
brute force
,
dp
,
implementation
1800
x1830
30C
Shooting Gallery
dp
,
probabilities
1800
x1847
187B
AlgoRace
dp
,
shortest paths
1800
x1922
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x1988
73C
LionAge II
dp
1800
x2041
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2053
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2086
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2169
132C
Logo Turtle
dp
1800
x2268
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2327
1575D
Divisible by Twenty-Five
brute force
,
dfs and similar
,
dp
1800
x2395
38E
Let's Go Rolling!
dp
,
sortings
1800
x2481
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2514
846C
Four Segments
brute force
,
data structures
,
dp
1800
x2612
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2647
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2680
847E
Packmen
binary search
,
dp
1800
x2714
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2757
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2839
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x2950
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x2953
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3294
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3413
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3421
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3588
1016C
Vasya And The Mushrooms
dp
,
implementation
1800
x3635
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3648
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3671
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3766
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3770
358D
Dima and Hares
dp
,
greedy
1800
x3867
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4095
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4104
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4245
946D
Timetable
dp
1800
x4258
869C
The Intriguing Obsession
combinatorics
,
dp
,
math
1800
x4350
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x4512
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4645
909C
Python Indentation
dp
1800
x4740
933A
A Twisty Movement
dp
1800
x4821
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4869
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4884
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4912
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4957
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x4996
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5174
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5192
983B
XOR-pyramid
dp
1800
x5210
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5237
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5463
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5472
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5621
721C
Journey
dp
,
graphs
1800
x5659
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5710
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5737
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x5924
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x5988
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6000
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6017
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6221
1283E
New Year Parties
dp
,
greedy
1800
x6266
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6268
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6344
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6380
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6446
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6512
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6547
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6676
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6741
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6826
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6872
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7032
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7086
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7214
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7275
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7286
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7304
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7348
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7470
1446B
Catching Cheaters
dp
,
strings
1800
x7519
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7540
543A
Writing Code
dp
1800
x7665
1096D
Easy Problem
dp
1800
x7678
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7939
1038D
Slime
dp
,
greedy
,
implementation
1800
x8109
1286A
Garland
dp
,
greedy
,
sortings
1800
x8381
1381B
Unmerge
dp
1800
x8480
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8492
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8512
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8552
1221D
Make The Fence Great Again
dp
1800
x8597
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8851
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