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Codeforces Round 941 (Div. 1)
3 days
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Codeforces Round 941 (Div. 2)
3 days
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brute force
combine-tags-by-or
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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
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implementation
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Problems
#
Name
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4920
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x4930
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4939
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4947
1468K
The Robot
brute force
,
implementation
1600
x4953
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4963
1716D
Chip Move
brute force
,
dp
,
math
2000
x4971
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4998
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5013
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5047
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5058
23A
You're Given a String...
brute force
,
greedy
1200
x5060
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5068
578B
"Or" Game
brute force
,
greedy
1700
x5109
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5113
1210A
Anadi and Domino
brute force
,
graphs
1700
x5116
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5121
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5124
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5128
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x5155
252A
Little Xor
brute force
,
implementation
1100
x5155
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5164
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5178
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x5179
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5181
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5184
1132C
Painting the Fence
brute force
1700
x5189
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5214
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5214
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x5238
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5257
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5261
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5284
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5293
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5346
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5366
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5378
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5381
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5381
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5384
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5396
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5438
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5464
1547F
Array Stabilization (GCD version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
number theory
,
two pointers
1900
x5477
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5517
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5520
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5525
887B
Cubes for Masha
brute force
,
implementation
1300
x5526
907A
Masha and Bears
brute force
,
implementation
1300
x5552
1812B
Was it Rated?
*special problem
,
*special problem
,
*special problem
,
brute force
,
implementation
x5558
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5571
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5576
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5590
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5603
821B
Okabe and Banana Trees
brute force
,
math
1300
x5623
1556C
Compressed Bracket Sequence
brute force
,
implementation
1800
x5640
1210B
Marcin and Training Camp
brute force
,
greedy
1700
x5662
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5662
593A
2Char
brute force
,
implementation
1200
x5670
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5682
18A
Triangle
brute force
,
geometry
1500
x5685
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5703
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5738
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5756
1162B
Double Matrix
brute force
,
greedy
1400
x5759
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5797
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5800
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5816
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5826
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5838
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5886
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5897
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x5914
106B
Choosing Laptop
brute force
,
implementation
1000
x5921
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5929
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x5970
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6014
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6080
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6090
626A
Robot Sequence
brute force
,
implementation
1000
x6135
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6136
192B
Walking in the Rain
brute force
,
implementation
1100
x6137
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x6138
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6141
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6147
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6160
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x6167
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6169
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6190
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6227
242A
Heads or Tails
brute force
,
implementation
1100
x6228
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6259
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6280
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6288
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6302
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6303
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6336
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6437
485B
Valuable Resources
brute force
,
greedy
1300
x6442
895A
Pizza Separation
brute force
,
implementation
1200
x6447
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