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Before contest
Codeforces Round 941 (Div. 1)
27:14:44
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
27:14:44
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→ Filter Problems
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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
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
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4649
808G
Anthem of Berland
dp
,
strings
2300
x2396
808F
Card Game
binary search
,
flows
,
graphs
2400
x1067
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1749
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6716
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x5953
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6581
808A
Lucky Year
implementation
900
x9050
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3526
807A
Is it rated?
implementation
,
sortings
900
x19382
805B
3-palindrome
constructive algorithms
1000
x16061
805A
Fake NP
greedy
,
math
1000
x17555
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x137
804E
The same permutation
constructive algorithms
3100
x409
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1256
804C
Ice cream coloring
constructive algorithms
,
dfs and similar
,
greedy
2200
x1611
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9512
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15175
803G
Periodic RMQ Problem
data structures
2300
x1291
803F
Coprime Subsequences
bitmasks
,
combinatorics
,
number theory
2000
x2981
803E
Roma and Poker
dp
,
graphs
2000
x2094
803D
Magazine Ad
binary search
,
greedy
1900
x3059
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4904
803B
Distances to Zero
constructive algorithms
1200
x6404
803A
Maximal Binary Matrix
constructive algorithms
1400
x4737
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x816
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1088
802M
April Fools' Problem (easy)
greedy
,
sortings
1200
x3016
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x279
802K
Send the Fool Further! (medium)
dp
,
trees
2100
x577
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4265
802I
Fake News (hard)
string suffix structures
2300
x1409
802H
Fake News (medium)
constructive algorithms
,
strings
2200
x426
802G
Fake News (easy)
implementation
,
strings
800
x6685
802F
Marmots (hard)
math
,
probabilities
2800
x120
802E
Marmots (medium)
math
2200
x237
802D
Marmots (easy)
math
2100
x437
802C
Heidi and Library (hard)
flows
2600
x528
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1009
802A
Heidi and Library (easy)
greedy
1800
x1282
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10002
801A
Vicious Keyboard
brute force
1100
x7211
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x107
799F
Beautiful fountains rows
data structures
3500
x417
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x911
799D
Field expansion
brute force
,
dp
,
meet-in-the-middle
2100
x1969
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3570
799B
T-shirt buying
data structures
,
implementation
1400
x8360
799A
Carrot Cakes
brute force
,
implementation
1100
x17827
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x454
798D
Mike and distribution
constructive algorithms
,
sortings
2400
x1836
798C
Mike and gcd problem
dp
,
greedy
,
number theory
1700
x5575
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8258
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21022
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1080
797E
Array Queries
brute force
,
data structures
,
dp
2000
x4043
797D
Broken BST
data structures
,
dfs and similar
2100
x1747
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6239
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10134
797A
k-Factorization
implementation
,
math
,
number theory
1100
x13906
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x169
796E
Exam Cheating
binary search
,
dp
2400
x621
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5119
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2964
796B
Find The Bone
implementation
1300
x8944
796A
Buying A House
brute force
,
implementation
800
x12816
794G
Replace All
combinatorics
,
dp
,
math
3400
x323
794F
Leha and security system
data structures
2800
x728
794E
Choosing Carrot
games
,
math
2800
x659
794D
Labelling Cities
dfs and similar
,
graphs
,
hashing
2400
x756
794C
Naming Company
games
,
greedy
,
sortings
1800
x3019
794B
Cutting Carrot
geometry
,
math
1200
x6318
794A
Bank Robbery
brute force
,
implementation
800
x6910
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x313
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x505
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x241
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1572
793C
Mice problem
geometry
,
implementation
,
math
,
sortings
2300
x1230
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4329
793A
Oleg and shares
implementation
,
math
900
x6529
792F
Mages and Monsters
data structures
,
geometry
3100
x199
792E
Colored Balls
greedy
,
math
,
number theory
2500
x1037
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2897
792C
Divide by Three
dp
,
greedy
,
math
,
number theory
2000
x4176
792B
Counting-out Rhyme
implementation
1300
x5893
792A
New Bus Route
implementation
,
sortings
1100
x8720
791A
Bear and Big Brother
implementation
800
x177932
789B
Masha and geometric depression
brute force
,
implementation
,
math
1700
x4342
789A
Anastasia and pebbles
implementation
,
math
1100
x9211
788E
New task
data structures
2900
x330
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x356
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2001
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2279
788A
Functions again
dp
,
two pointers
1600
x8952
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5567
787A
The Monster
brute force
,
math
,
number theory
1200
x11026
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x601
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x136
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2509
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5394
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