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Before contest
Codeforces Round 941 (Div. 1)
12:04:06
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Before contest
Codeforces Round 941 (Div. 2)
12:04:06
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→ Filter Problems
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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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Custom test
Problems
#
Name
659A
Round House
implementation
,
math
1000
x15343
658A
Bear and Reverse Radewoosh
implementation
800
x6955
656B
Scrambled
*special problem
,
implementation
1700
x1628
653C
Bear and Up-Down
brute force
,
implementation
1900
x1622
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x7991
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4552
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x22469
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x342
649A
Любимые числа Поликарпа
constructive algorithms
,
implementation
1000
x1088
648A
Наибольший подъем
constructive algorithms
,
implementation
900
x571
645A
Amity Assessment
brute force
,
constructive algorithms
,
implementation
1200
x3355
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
643A
Bear and Colors
implementation
1500
x4102
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1046
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x2839
641B
Little Artem and Matrix
implementation
1400
x3733
641A
Little Artem and Grasshopper
implementation
1000
x5798
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1187
639A
Bear and Displayed Friends
implementation
1200
x6015
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2409
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x5304
635A
Orchestra
brute force
,
implementation
1100
x2818
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3085
633H
Fibonacci-ish II
data structures
,
implementation
3100
x564
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2558
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2598
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1983
631B
Print Check
constructive algorithms
,
implementation
1200
x7240
631A
Interview
brute force
,
implementation
900
x9125
630L
Cracking the Code
implementation
,
math
1400
x3444
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13089
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x830
628A
Tennis Tournament
implementation
,
math
1000
x6148
626A
Robot Sequence
brute force
,
implementation
1000
x6137
625D
Finals in arithmetic
constructive algorithms
,
implementation
,
math
2400
x623
625C
K-special Tables
constructive algorithms
,
implementation
1300
x6638
625A
Guest From the Past
implementation
,
math
1700
x5350
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6181
622B
The Time
implementation
900
x9067
622A
Infinite Sequence
implementation
,
math
1000
x9056
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x10775
621A
Wet Shark and Odd and Even
implementation
900
x19560
620B
Grandfather Dovlet’s calculator
implementation
1000
x9185
620A
Professor GukiZ's Robot
implementation
,
math
800
x12717
618C
Constellation
geometry
,
implementation
1600
x4162
618A
Slime Combining
implementation
800
x8280
617D
Polyline
constructive algorithms
,
implementation
1700
x4128
617C
Watering Flowers
implementation
1600
x4757
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2656
616A
Comparing Two Long Integers
implementation
,
strings
900
x9500
615E
Hexagons
binary search
,
implementation
,
math
2100
x962
615A
Bulbs
implementation
800
x16610
614B
Gena's Code
implementation
,
math
1400
x6758
614A
Link/Cut Tree
brute force
,
implementation
1500
x7395
612B
HDD is Outdated Technology
implementation
,
math
1200
x6817
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7009
611F
New Year and Cleaning
binary search
,
implementation
2500
x454
611C
New Year and Domino
dp
,
implementation
1500
x8318
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9760
611A
New Year and Days
implementation
900
x11550
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7040
609C
Load Balancing
implementation
,
math
1500
x6294
609B
The Best Gift
constructive algorithms
,
implementation
1100
x8785
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x16778
608A
Saitama Destroys Hotel
implementation
,
math
1000
x9136
606B
Testing Robots
implementation
1600
x2730
606A
Magic Spheres
implementation
1200
x7738
604A
Uncowed Forces
implementation
1000
x8835
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10393
602A
Two Bases
brute force
,
implementation
1100
x8356
600A
Extract Numbers
implementation
,
strings
1600
x4846
599B
Spongebob and Joke
implementation
1500
x4327
599A
Patrick and Shopping
implementation
800
x27760
598B
Queries on a String
implementation
,
strings
1300
x10422
596B
Wilbur and Array
greedy
,
implementation
1100
x10188
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7594
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14346
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x673
593A
2Char
brute force
,
implementation
1200
x5670
592A
PawnChess
implementation
1200
x6302
591B
Rebranding
implementation
,
strings
1200
x8127
591A
Wizards' Duel
implementation
,
math
900
x13874
590A
Median Smoothing
implementation
1700
x3892
586B
Laurenty and Shop
implementation
1300
x5111
586A
Alena's Schedule
implementation
900
x9887
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x635
585A
Gennady the Dentist
brute force
,
implementation
1800
x4110
583B
Robot's Task
greedy
,
implementation
1200
x8619
583A
Asphalting Roads
implementation
1000
x11252
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3411
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7239
581B
Luxurious Houses
implementation
,
math
1100
x12880
581A
Vasya the Hipster
implementation
,
math
800
x66897
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83687
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5181
577A
Multiplication Table
implementation
,
number theory
1000
x37949
575D
Tablecity
constructive algorithms
,
implementation
1700
x1803
574A
Bear and Elections
greedy
,
implementation
1200
x8960
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16270
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6737
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