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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
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2-sat
binary search
bitmasks
brute force
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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
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number theory
probabilities
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shortest paths
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ternary search
trees
two pointers
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Problems
#
Name
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4070
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4050
1141F2
Same Sum Blocks (Hard)
data structures
,
greedy
1900
x4048
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4046
1638D
Big Brush
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x4028
1090A
Company Merging
greedy
1300
x4026
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4021
1620D
Exact Change
brute force
,
constructive algorithms
,
greedy
2000
x4018
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4018
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4015
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4012
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4009
1566E
Buds Re-hanging
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x4008
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x4000
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x3998
1082E
Increasing Frequency
binary search
,
dp
,
greedy
2000
x3993
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3983
154A
Hometask
greedy
1600
x3976
250A
Paper Work
greedy
1000
x3975
79A
Bus Game
greedy
1200
x3970
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x3967
1733D2
Zero-One (Hard Version)
dp
,
greedy
2000
x3964
1621D
The Winter Hike
constructive algorithms
,
greedy
,
math
2100
x3955
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3951
1872G
Replace With Product
brute force
,
greedy
,
math
2000
x3941
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3939
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3937
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x3936
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3934
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x3923
333A
Secrets
greedy
1600
x3922
1138B
Circus
brute force
,
greedy
,
math
,
strings
1800
x3920
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3914
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x3906
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3900
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x3893
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x3877
1129A2
Toy Train
brute force
,
greedy
1800
x3872
1256E
Yet Another Division Into Teams
dp
,
greedy
,
sortings
2000
x3867
358D
Dima and Hares
dp
,
greedy
1800
x3866
449A
Jzzhu and Chocolate
greedy
,
math
1700
x3865
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x3864
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3859
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3857
527B
Error Correct System
greedy
1500
x3855
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x3853
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3853
33A
What is for dinner?
greedy
,
implementation
1200
x3840
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3835
1384B1
Koa and the Beach (Easy Version)
brute force
,
dp
,
greedy
1900
x3832
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3806
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3791
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3780
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x3772
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3760
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3742
363D
Renting Bikes
binary search
,
greedy
1800
x3739
1141F1
Same Sum Blocks (Easy)
greedy
1900
x3728
980C
Posterized
games
,
greedy
1700
x3720
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3711
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3702
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3689
101A
Homework
greedy
1200
x3686
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3683
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3680
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3674
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3674
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3665
612D
The Union of k-Segments
greedy
,
sortings
1800
x3662
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3642
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3642
1136D
Nastya Is Buying Lunch
greedy
1800
x3640
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3636
988E
Divisibility by 25
brute force
,
greedy
2100
x3634
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3630
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3630
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3629
1680E
Moving Chips
bitmasks
,
dp
,
greedy
2000
x3619
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3607
898D
Alarm Clock
greedy
1600
x3605
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3602
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3587
1260D
A Game with Traps
binary search
,
dp
,
greedy
,
sortings
1900
x3579
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3575
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3573
1070F
Debate
greedy
1500
x3569
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3567
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3557
1060D
Social Circles
greedy
,
math
1900
x3557
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3553
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3541
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3533
446B
DZY Loves Modification
brute force
,
data structures
,
greedy
2000
x3513
120F
Spiders
dp
,
greedy
,
trees
1400
x3500
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3498
673B
Problems for Round
greedy
,
implementation
1300
x3494
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3493
883M
Quadcopter Competition
greedy
,
math
1100
x3487
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3477
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3476
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