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Before contest
Codeforces Round 954 (Div. 3)
28:01:33
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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
#
Name
1735B
Tea with Tangerines
greedy
,
math
900
x17857
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x19986
1734F
Zeros and Ones
bitmasks
,
divide and conquer
,
dp
,
math
2500
x776
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2819
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6119
1734C
Removing Smallest Multiples
greedy
,
math
1200
x17403
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15633
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20866
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1110
1733D2
Zero-One (Hard Version)
dp
,
greedy
2000
x4041
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13075
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15255
1733B
Rule of League
constructive algorithms
,
math
900
x19398
1733A
Consecutive Sum
greedy
,
sortings
800
x20726
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x419
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1376
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8422
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2483
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5665
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x14521
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14585
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x667
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2709
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6867
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9158
1731B
Kill Demodogs
greedy
,
math
1100
x17220
1731A
Joey Takes Money
greedy
,
math
800
x22203
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x421
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x618
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2612
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16214
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x12138
1730A
Planets
data structures
,
greedy
,
sortings
800
x22658
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2087
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4044
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6831
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x19432
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x19594
1729B
Decode String
greedy
,
strings
800
x29612
1729A
Two Elevators
math
800
x39408
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x434
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x415
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1669
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6967
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15497
1728B
Best Permutation
constructive algorithms
,
greedy
800
x19972
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24419
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x82
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x288
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1366
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3577
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12135
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14818
1726A
Mainak and Array
greedy
,
math
900
x20429
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2901
1725L
Lemper Cooking Competition
data structures
2400
x885
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x591
1725J
Journey
dp
,
trees
2500
x364
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x192
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2530
1725G
Garage
binary search
,
geometry
,
math
1500
x5691
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x945
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x441
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x119
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1561
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x12279
1725A
Accumulation of Dominoes
math
800
x9110
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10688
1722F
L-shapes
dfs and similar
,
implementation
1700
x6655
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10288
1722D
Line
greedy
,
sortings
1100
x22556
1722C
Word Game
data structures
,
implementation
800
x29908
1722B
Colourblindness
implementation
800
x43994
1722A
Spell Check
implementation
800
x48044
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x372
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1840
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6414
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13076
1721B
Deadly Laser
implementation
1000
x21665
1721A
Image
greedy
,
implementation
800
x26727
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x749
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1769
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5794
1720C
Corners
greedy
,
implementation
1200
x16444
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20850
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21941
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12975
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18354
1719A
Chip Game
games
,
math
800
x25110
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x147
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x105
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x293
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1539
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2910
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5067
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5572
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x519
1717E
Madoka and The Best University
math
,
number theory
2200
x2539
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4302
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