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Codeforces Round 961 (Div. 2)
09:11:30
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→ Filter Problems
Difficulty:
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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
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Status
Standings
Custom test
Problems
#
Name
479C
Exams
greedy
,
sortings
1400
x29089
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7805
479A
Expression
brute force
,
math
1000
x91365
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x219
478D
Red-Green Towers
dp
2000
x5554
478C
Table Decorations
greedy
1800
x17796
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35915
478A
Initial Bet
implementation
1100
x25287
477E
Dreamoon and Notepad
data structures
3100
x133
477D
Dreamoon and Binary
dp
,
strings
2700
x520
476E
Dreamoon and Strings
dp
,
strings
2200
x1820
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4439
476C
Dreamoon and Sums
math
1600
x5491
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29867
476A
Dreamoon and Stairs
implementation
,
math
1000
x42450
475F
Meta-universe
data structures
2900
x227
475E
Strongly Connected City 2
dfs and similar
2700
x406
475D
CGCDSSQ
brute force
,
data structures
,
math
2000
x4672
475C
Kamal-ol-molk's Painting
brute force
,
constructive algorithms
,
greedy
2100
x778
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8362
475A
Bayan Bus
implementation
1100
x4738
474F
Ant colony
data structures
,
math
,
number theory
2100
x8233
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3219
474D
Flowers
dp
1700
x24564
474C
Captain Marmot
brute force
,
geometry
2000
x3090
474B
Worms
binary search
,
implementation
1200
x46338
474A
Keyboard
implementation
900
x44038
472G
Design Tutorial: Increase the Constraints
bitmasks
,
data structures
,
fft
2800
x395
472F
Design Tutorial: Change the Goal
constructive algorithms
,
math
,
matrices
2700
x250
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x131
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5181
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6342
472B
Design Tutorial: Learn from Life
1300
x7391
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x58410
471E
MUH and Lots and Lots of Segments
data structures
,
dsu
2700
x81
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x7747
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3545
471B
MUH and Important Things
implementation
,
sortings
1300
x5914
471A
MUH and Sticks
implementation
1100
x13379
470H
Array Sorting
*special problem
2300
x188
470G
Hamming Distance
*special problem
2300
x95
470F
Pairwise Sums
*special problem
2300
x104
470E
Chessboard
*special problem
1900
x196
470D
Caesar Cipher
*special problem
1900
x151
470C
Eval
*special problem
1900
x238
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x258
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x670
469B
Chat Online
implementation
1300
x12485
469A
I Wanna Be the Guy
greedy
,
implementation
800
x94236
468E
Permanent
dp
,
graph matchings
,
math
,
meet-in-the-middle
3100
x312
468D
Tree
graph matchings
3100
x359
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2328
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x4047
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7940
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x770
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1785
467C
George and Job
dp
,
implementation
1700
x14342
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36870
467A
George and Accommodation
implementation
800
x117480
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2159
466D
Increase Sequence
combinatorics
,
dp
2100
x3098
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x35284
466B
Wonder Room
brute force
,
math
2000
x4841
466A
Cheap Travel
implementation
1200
x61471
465B
Inbox (100500)
implementation
1000
x10333
465A
inc ARG
implementation
900
x9977
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1392
464D
World of Darkraft - 2
dp
,
probabilities
2700
x663
464C
Substitutes in Number
dp
2100
x1842
464B
Restore Cube
brute force
,
geometry
2000
x1671
464A
No to Palindromes!
greedy
,
strings
1700
x5839
463E
Caisa and Tree
brute force
,
dfs and similar
,
math
,
number theory
,
trees
2100
x1582
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x6181
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8646
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x26552
463A
Caisa and Sugar
brute force
,
implementation
1200
x9194
462B
Appleman and Card Game
greedy
1300
x14238
462A
Appleman and Easy Task
brute force
,
implementation
1000
x16725
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x370
461D
Appleman and Complicated Task
dsu
,
math
2800
x361
461C
Appleman and a Sheet of Paper
data structures
,
implementation
2200
x1319
461B
Appleman and Tree
dfs and similar
,
dp
,
trees
2000
x5454
461A
Appleman and Toastman
greedy
,
sortings
1200
x15378
460E
Roland and Rose
brute force
,
geometry
,
math
,
sortings
2700
x340
460D
Little Victor and Set
brute force
,
constructive algorithms
,
math
2300
x988
460C
Present
binary search
,
data structures
,
greedy
1700
x6125
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12213
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x45044
459E
Pashmak and Graph
dp
,
sortings
1900
x5316
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9818
459C
Pashmak and Buses
combinatorics
,
constructive algorithms
,
math
1900
x6134
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x39418
459A
Pashmak and Garden
implementation
1200
x32050
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x105
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x95
457D
Bingo!
combinatorics
,
math
,
probabilities
2700
x276
457C
Elections
brute force
2100
x874
457B
Distributed Join
greedy
1900
x1128
457A
Golden System
math
,
meet-in-the-middle
1700
x1267
456B
Fedya and Maths
math
,
number theory
1200
x16355
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