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Codeforces Round 952 (Div. 4)
13:02:44
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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
#
Name
988A
Diverse Team
brute force
,
implementation
800
x24100
987C
Three displays
brute force
,
dp
,
implementation
1400
x13180
987A
Infinity Gauntlet
implementation
800
x16332
985B
Switches and Lamps
implementation
1200
x7318
985A
Chess Placing
implementation
1100
x8077
984B
Minesweeper
implementation
1100
x7279
983A
Finite or not?
implementation
,
math
1700
x4460
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8202
981C
Useful Decomposition
implementation
,
trees
1400
x5211
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9106
980A
Links and Pearls
implementation
,
math
900
x10271
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4243
978F
Mentors
binary search
,
data structures
,
implementation
1500
x8086
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8450
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24609
978A
Remove Duplicates
implementation
800
x26290
977B
Two-gram
implementation
,
strings
900
x37316
977A
Wrong Subtraction
implementation
800
x157470
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x674
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x6371
976B
Lara Croft and the New Game
implementation
,
math
1300
x5673
976A
Minimum Binary Number
implementation
800
x10454
975B
Mancala
brute force
,
implementation
1100
x6762
975A
Aramic script
implementation
,
strings
900
x9008
967A
Mind the Gap
implementation
1100
x4286
965B
Battleship
implementation
1300
x4490
962D
Merge Equals
data structures
,
implementation
1600
x6740
962C
Make a Square
brute force
,
implementation
,
math
1400
x7755
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7600
962A
Equator
implementation
1300
x12565
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5247
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19495
961A
Tetris
implementation
900
x9936
960D
Full Binary Tree Queries
brute force
,
implementation
,
trees
2100
x1739
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3885
960A
Check the string
implementation
1200
x8070
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3329
959B
Mahmoud and Ehab and the message
dsu
,
greedy
,
implementation
1200
x9184
958F1
Lightsabers (easy)
implementation
1500
x1590
958B1
Maximum Control (easy)
implementation
1000
x3334
958A1
Death Stars (easy)
implementation
1400
x1637
957A
Tritonic Iridescence
implementation
1300
x5688
955B
Not simply beatiful strings
implementation
1400
x4751
954C
Matrix Walk
implementation
1700
x3740
954B
String Typing
implementation
,
strings
1400
x7109
954A
Diagonal Walking
implementation
800
x10399
952C
Ravioli Sort
implementation
1600
x2866
950B
Intercepted Message
greedy
,
implementation
1100
x7321
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x14977
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13456
946E
Largest Beautiful Number
greedy
,
implementation
2200
x1079
940D
Alena And The Heater
binary search
,
implementation
1600
x3586
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5637
939B
Hamster Farm
implementation
1000
x10327
938A
Word Correction
implementation
800
x11307
937A
Olympiad
implementation
,
sortings
800
x14890
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x1157
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4324
935B
Fafa and the Gates
implementation
900
x11399
935A
Fafa and his Company
brute force
,
implementation
800
x41840
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x8546
931C
Laboratory Work
implementation
,
math
1700
x3298
931B
World Cup
constructive algorithms
,
implementation
1200
x7049
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11756
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x397
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2609
929B
Места в самолёте
*special problem
,
implementation
1300
x2038
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2492
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x882
926C
Is This a Zebra?
implementation
1700
x1862
926A
2-3-numbers
implementation
,
math
1300
x3691
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2179
924A
Mystical Mosaic
greedy
,
implementation
1300
x4914
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1160
922A
Cloning Toys
implementation
1300
x11370
920D
Tanks
dp
,
greedy
,
implementation
2400
x685
920B
Tea Queue
implementation
1200
x7136
920A
Water The Garden
implementation
1000
x7625
919C
Seat Arrangements
brute force
,
implementation
1300
x8840
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x27142
919A
Supermarket
brute force
,
greedy
,
implementation
800
x15957
918B
Radio Station
implementation
,
strings
900
x15783
918A
Eleven
brute force
,
implementation
800
x16811
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3484
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8493
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4068
915B
Browser
implementation
1300
x7657
915A
Garden
implementation
900
x14421
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8525
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13843
913B
Christmas Spruce
implementation
,
trees
1200
x15545
913A
Modular Exponentiation
implementation
,
math
900
x20674
912A
Tricky Alchemy
implementation
800
x13353
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2469
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11063
911A
Nearest Minimums
implementation
1100
x11338
910B
Door Frames
greedy
,
implementation
1600
x1680
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11451
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1756
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1380
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