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Codeforces Round 972 (Div. 2)
28:39:17
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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
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Status
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Custom test
Problems
#
Name
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4619
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x22867
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x351
649A
Любимые числа Поликарпа
constructive algorithms
,
implementation
1000
x1195
648A
Наибольший подъем
constructive algorithms
,
implementation
900
x658
645A
Amity Assessment
brute force
,
constructive algorithms
,
implementation
1200
x3439
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x914
643A
Bear and Colors
implementation
1500
x4140
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1236
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x3038
641B
Little Artem and Matrix
implementation
1400
x3979
641A
Little Artem and Grasshopper
implementation
1000
x5893
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1199
639A
Bear and Displayed Friends
implementation
1200
x6142
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2417
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x5386
635A
Orchestra
brute force
,
implementation
1100
x2881
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3304
633H
Fibonacci-ish II
data structures
,
implementation
3100
x590
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2783
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2745
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2068
631B
Print Check
constructive algorithms
,
implementation
1200
x7341
631A
Interview
brute force
,
implementation
900
x9247
630L
Cracking the Code
implementation
,
math
1400
x3549
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13340
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x883
628A
Tennis Tournament
implementation
,
math
1000
x6296
626A
Robot Sequence
brute force
,
implementation
1000
x6190
625D
Finals in arithmetic
constructive algorithms
,
implementation
,
math
2400
x628
625C
K-special Tables
constructive algorithms
,
implementation
1300
x6806
625A
Guest From the Past
implementation
,
math
1700
x5382
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6523
622B
The Time
implementation
900
x9458
622A
Infinite Sequence
implementation
,
math
1000
x9244
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x10942
621A
Wet Shark and Odd and Even
implementation
900
x20161
620B
Grandfather Dovlet’s calculator
implementation
1000
x9385
620A
Professor GukiZ's Robot
implementation
,
math
800
x13066
618C
Constellation
geometry
,
implementation
1600
x4223
618A
Slime Combining
implementation
800
x8321
617D
Polyline
constructive algorithms
,
implementation
1700
x4194
617C
Watering Flowers
implementation
1600
x4853
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2863
616A
Comparing Two Long Integers
implementation
,
strings
900
x9794
615E
Hexagons
binary search
,
implementation
,
math
2100
x973
615A
Bulbs
implementation
800
x17172
614B
Gena's Code
implementation
,
math
1400
x6885
614A
Link/Cut Tree
brute force
,
implementation
1500
x7444
612B
HDD is Outdated Technology
implementation
,
math
1200
x6978
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7197
611F
New Year and Cleaning
binary search
,
implementation
2500
x476
611C
New Year and Domino
dp
,
implementation
1500
x8442
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x10041
611A
New Year and Days
implementation
900
x11631
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7226
609C
Load Balancing
implementation
,
math
1500
x6554
609B
The Best Gift
constructive algorithms
,
implementation
1100
x8995
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x17185
608A
Saitama Destroys Hotel
implementation
,
math
1000
x9301
606B
Testing Robots
implementation
1600
x2742
606A
Magic Spheres
implementation
1200
x7962
604A
Uncowed Forces
implementation
1000
x8950
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10745
602A
Two Bases
brute force
,
implementation
1100
x8445
600A
Extract Numbers
implementation
,
strings
1600
x5196
599B
Spongebob and Joke
implementation
1500
x4359
599A
Patrick and Shopping
implementation
800
x28509
598B
Queries on a String
implementation
,
strings
1300
x10889
596B
Wilbur and Array
greedy
,
implementation
1100
x10309
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7697
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14504
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x682
593A
2Char
brute force
,
implementation
1200
x5734
592A
PawnChess
implementation
1200
x6334
591B
Rebranding
implementation
,
strings
1200
x8216
591A
Wizards' Duel
implementation
,
math
900
x14191
590A
Median Smoothing
implementation
1700
x3919
586B
Laurenty and Shop
implementation
1300
x5142
586A
Alena's Schedule
implementation
900
x9985
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x678
585A
Gennady the Dentist
brute force
,
implementation
1800
x4321
583B
Robot's Task
greedy
,
implementation
1200
x8713
583A
Asphalting Roads
implementation
1000
x11361
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3641
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7309
581B
Luxurious Houses
implementation
,
math
1100
x13016
581A
Vasya the Hipster
implementation
,
math
800
x70279
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x87450
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5244
577A
Multiplication Table
implementation
,
number theory
1000
x39456
575D
Tablecity
constructive algorithms
,
implementation
1700
x1819
574A
Bear and Elections
greedy
,
implementation
1200
x9066
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16489
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6885
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2317
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x9113
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x16081
570A
Elections
implementation
1100
x13845
569A
Music
implementation
,
math
1500
x4787
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