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Codeforces Round (Div. 3)
39:11:24
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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
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27207
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36207
455A
Boredom
dp
1500
x54060
174B
File List
dp
,
greedy
,
implementation
1400
x2189
928B
Chat
*special problem
,
dp
1400
x2489
120F
Spiders
dp
,
greedy
,
trees
1400
x3507
44E
Anfisa the Monkey
dp
1400
x4808
180C
Letter
dp
1400
x7046
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7707
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8265
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x8824
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9472
534B
Covered Path
dp
,
greedy
,
math
1400
x9849
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10060
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10140
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10268
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10301
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10408
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10584
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10639
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11166
1276A
As Simple as One and Two
dp
,
greedy
1400
x12033
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x12058
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12068
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12189
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12353
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12370
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12390
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12778
987C
Three displays
brute force
,
dp
,
implementation
1400
x13075
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13296
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13326
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14421
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14690
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15197
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15418
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x15852
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16060
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16716
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x16736
1245C
Constanze's Machine
dp
1400
x16738
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17578
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19861
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20538
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20776
1195C
Basketball Exercise
dp
1400
x23808
698A
Vacations
dp
1400
x28388
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28595
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44328
1769C2
Подкрутка II
*special problem
,
dp
1300
x911
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4878
234C
Weather
dp
,
implementation
1300
x5324
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6504
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7010
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8260
416B
Art Union
brute force
,
dp
,
implementation
1300
x8516
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8951
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8959
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9146
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9329
628B
New Skateboard
dp
1300
x10291
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10365
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10692
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x11535
1945D
Seraphim the Owl
dp
,
greedy
1300
x11833
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12478
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12931
1766C
Hamiltonian Wall
dp
,
implementation
1300
x13058
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13800
1178B
WOW Factor
dp
,
strings
1300
x13828
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x13829
1459B
Move and Turn
dp
,
math
1300
x13876
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14111
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14156
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14262
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14781
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x14840
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15467
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16946
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x17000
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17291
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18085
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18103
1618D
Array and Operations
dp
,
greedy
,
math
1300
x18249
1037C
Equalize
dp
,
greedy
,
strings
1300
x18288
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18717
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x20824
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x20932
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21200
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24374
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x28975
189A
Cut Ribbon
brute force
,
dp
1300
x62323
1769C1
Подкрутка I
*special problem
,
brute force
,
dp
,
greedy
1200
x928
729B
Spotlights
dp
,
implementation
1200
x7706
1140D
Minimum Triangulation
dp
,
greedy
,
math
1200
x12362
998B
Cutting
dp
,
greedy
,
sortings
1200
x12737
1245B
Restricted RPS
constructive algorithms
,
dp
,
greedy
1200
x13431
1200B
Block Adventure
dp
,
greedy
1200
x13590
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x15155
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15695
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