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Codeforces Round 937 (Div. 4)
06:27:01
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Difficulty:
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two pointers
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
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11869
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x11828
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x11768
716B
Complete the Word
greedy
,
two pointers
1300
x11672
1251C
Minimize The Integer
greedy
,
two pointers
1600
x11541
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11533
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11390
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11320
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11308
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11213
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11198
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11085
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x10910
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10788
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10649
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10560
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10522
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10518
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10427
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10349
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10272
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10217
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10183
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10135
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10025
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10017
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x9969
842A
Kirill And The Game
brute force
,
two pointers
1200
x9921
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9715
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x9603
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9601
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9401
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9360
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9267
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9184
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9170
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9093
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9081
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8943
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x8938
788A
Functions again
dp
,
two pointers
1600
x8916
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x8878
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x8866
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x8760
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x8687
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8626
1198A
MP3
sortings
,
two pointers
1600
x8615
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8603
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8596
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x8583
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8577
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8239
432D
Prefixes and Suffixes
dp
,
string suffix structures
,
strings
,
two pointers
2000
x8069
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8019
1066B
Heaters
greedy
,
two pointers
1500
x8008
279C
Ladder
dp
,
implementation
,
two pointers
1700
x7995
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x7969
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x7958
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x7942
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7896
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x7844
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7738
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7654
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x7653
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x7560
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7533
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7489
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7356
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7334
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7302
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x7252
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7157
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7135
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7119
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7104
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x6989
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x6872
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6801
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x6751
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6739
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6712
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6682
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6633
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6585
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6498
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6409
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6338
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6247
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6245
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6220
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x6068
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6020
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x5995
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x5936
1776H
Beppa and SwerChat
two pointers
1300
x5925
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5922
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x5918
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5895
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5811
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5760
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