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Codeforces Round 937 (Div. 4)
03:24:48
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Difficulty:
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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
x364
95B
Lucky Numbers
dp
,
greedy
1800
x1170
182E
Wooden Fence
dp
1800
x1407
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1620
234F
Fence
dp
1800
x1683
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1707
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1709
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1750
49D
Game
brute force
,
dp
,
implementation
1800
x1819
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x1822
30C
Shooting Gallery
dp
,
probabilities
1800
x1840
187B
AlgoRace
dp
,
shortest paths
1800
x1849
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2029
73C
LionAge II
dp
1800
x2033
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2070
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2154
132C
Logo Turtle
dp
1800
x2260
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2320
1575D
Divisible by Twenty-Five
brute force
,
dfs and similar
,
dp
1800
x2366
38E
Let's Go Rolling!
dp
,
sortings
1800
x2449
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2508
846C
Four Segments
brute force
,
data structures
,
dp
1800
x2600
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2640
847E
Packmen
binary search
,
dp
1800
x2652
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2674
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2678
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2786
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x2938
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x2940
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3285
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3409
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3417
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3496
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3563
1016C
Vasya And The Mushrooms
dp
,
implementation
1800
x3625
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3664
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3737
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3760
358D
Dima and Hares
dp
,
greedy
1800
x3842
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4052
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4099
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4229
946D
Timetable
dp
1800
x4231
869C
The Intriguing Obsession
combinatorics
,
dp
,
math
1800
x4313
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4608
909C
Python Indentation
dp
1800
x4709
933A
A Twisty Movement
dp
1800
x4747
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4790
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4796
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4859
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4860
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x4916
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x4996
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5112
983B
XOR-pyramid
dp
1800
x5150
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5155
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5410
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5490
721C
Journey
dp
,
graphs
1800
x5628
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5653
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5654
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x5807
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x5905
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5922
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x5936
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6036
1283E
New Year Parties
dp
,
greedy
1800
x6176
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6221
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6306
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6340
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6404
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6410
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6467
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6500
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6633
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6637
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6739
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6803
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x6998
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7136
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7139
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7167
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7237
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7264
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7430
1446B
Catching Cheaters
dp
,
strings
1800
x7461
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7491
1096D
Easy Problem
dp
1800
x7498
543A
Writing Code
dp
1800
x7629
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7896
1038D
Slime
dp
,
greedy
,
implementation
1800
x8082
1286A
Garland
dp
,
greedy
,
sortings
1800
x8283
1381B
Unmerge
dp
1800
x8439
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8445
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8450
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8487
1221D
Make The Fence Great Again
dp
1800
x8535
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8791
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x8858
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9006
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