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Before contest
Codeforces Round 941 (Div. 1)
2 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
→ 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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Problems
#
Name
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4612
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4606
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4605
540B
School Marks
greedy
,
implementation
1700
x4596
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4590
405C
Unusual Product
implementation
,
math
1600
x4563
1536D
Omkar and Medians
data structures
,
greedy
,
implementation
2000
x4550
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4550
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4532
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4523
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4517
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4503
221B
Little Elephant and Numbers
implementation
1300
x4497
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4488
120A
Elevator
brute force
,
implementation
,
math
1000
x4485
94B
Friends
graphs
,
implementation
,
math
1300
x4479
366A
Dima and Guards
implementation
1100
x4477
965B
Battleship
implementation
1300
x4469
747C
Servers
implementation
1300
x4467
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4464
983A
Finite or not?
implementation
,
math
1700
x4447
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4437
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4426
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4407
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4402
1137A
Skyscrapers
implementation
,
sortings
1600
x4398
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4397
1567D
Expression Evaluation Error
constructive algorithms
,
greedy
,
implementation
,
math
2000
x4394
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4384
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4383
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4377
234A
Lefthanders and Righthanders
implementation
1200
x4376
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4357
71B
Progress Bar
implementation
,
math
1300
x4354
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4352
825C
Multi-judge Solving
greedy
,
implementation
1600
x4347
789B
Masha and geometric depression
brute force
,
implementation
,
math
1700
x4342
88B
Keyboard
implementation
1500
x4342
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4331
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4329
599B
Spongebob and Joke
implementation
1500
x4327
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4325
832B
Petya and Exam
implementation
,
strings
1600
x4325
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4323
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4316
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4313
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4311
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4300
412A
Poster
greedy
,
implementation
900
x4296
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4295
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4282
967A
Mind the Gap
implementation
1100
x4277
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4273
1569D
Inconvenient Pairs
binary search
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x4237
1054C
Candies Distribution
constructive algorithms
,
implementation
1500
x4228
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4220
146B
Lucky Mask
brute force
,
implementation
1300
x4218
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4199
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4186
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4184
1418D
Trash Problem
data structures
,
implementation
2100
x4169
618C
Constellation
geometry
,
implementation
1600
x4161
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4154
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4150
846A
Curriculum Vitae
brute force
,
implementation
1500
x4150
1662A
Organizing SWERC
brute force
,
implementation
x4143
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4136
617D
Polyline
constructive algorithms
,
implementation
1700
x4128
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4126
203A
Two Problems
brute force
,
implementation
1200
x4111
585A
Gennady the Dentist
brute force
,
implementation
1800
x4110
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4104
643A
Bear and Colors
implementation
1500
x4102
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4098
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4093
906A
Shockers
implementation
,
strings
1600
x4086
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4080
399A
Pages
implementation
x4074
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4070
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4064
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4061
112B
Petya and Square
implementation
,
math
1200
x4060
825B
Five-In-a-Row
brute force
,
implementation
1600
x4048
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4046
1952D
Are You a Procrastinator?
implementation
x4035
1638D
Big Brush
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x4028
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4021
1250A
Berstagram
implementation
1400
x4020
69E
Subsegments
data structures
,
implementation
1800
x4020
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4018
678B
The Same Calendar
implementation
1600
x4018
1618F
Reverse
bitmasks
,
constructive algorithms
,
dfs and similar
,
implementation
,
math
,
strings
2000
x4014
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4009
319B
Psychos in a Line
data structures
,
implementation
1900
x4009
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4008
907B
Tic-Tac-Toe
implementation
1400
x4006
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x4000
1095E
Almost Regular Bracket Sequence
implementation
1900
x4000
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x3998
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x3992
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