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Before contest
Codeforces Round 953 (Div. 2)
07:03:51
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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
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15622
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20854
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1107
1733D2
Zero-One (Hard Version)
dp
,
greedy
2000
x4034
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13042
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15236
1733B
Rule of League
constructive algorithms
,
math
900
x19383
1733A
Consecutive Sum
greedy
,
sortings
800
x20711
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x419
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1375
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8387
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2481
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5649
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x14464
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14547
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x664
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2702
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6846
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9114
1731B
Kill Demodogs
greedy
,
math
1100
x17129
1731A
Joey Takes Money
greedy
,
math
800
x22190
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x420
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x617
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2609
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16192
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x12091
1730A
Planets
data structures
,
greedy
,
sortings
800
x22636
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2087
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4034
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6813
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x19342
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x19570
1729B
Decode String
greedy
,
strings
800
x29576
1729A
Two Elevators
math
800
x39307
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x430
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x413
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1668
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6955
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15464
1728B
Best Permutation
constructive algorithms
,
greedy
800
x19967
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24416
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x82
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x286
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1365
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3573
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12128
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14803
1726A
Mainak and Array
greedy
,
math
900
x20344
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2896
1725L
Lemper Cooking Competition
data structures
2400
x883
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x589
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
x2524
1725G
Garage
binary search
,
geometry
,
math
1500
x5669
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
x1559
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x12175
1725A
Accumulation of Dominoes
math
800
x9102
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10628
1722F
L-shapes
dfs and similar
,
implementation
1700
x6642
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10246
1722D
Line
greedy
,
sortings
1100
x22509
1722C
Word Game
data structures
,
implementation
800
x29847
1722B
Colourblindness
implementation
800
x43882
1722A
Spell Check
implementation
800
x47894
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
x1835
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6403
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13057
1721B
Deadly Laser
implementation
1000
x21645
1721A
Image
greedy
,
implementation
800
x26715
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x748
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1767
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5785
1720C
Corners
greedy
,
implementation
1200
x16429
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20841
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21913
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12958
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18343
1719A
Chip Game
games
,
math
800
x25096
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x146
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x105
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x291
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1534
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2903
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5051
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5552
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x518
1717E
Madoka and The Best University
math
,
number theory
2200
x2525
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4294
1717C
Madoka and Formal Statement
greedy
1300
x14367
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14541
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19229
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x1007
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1029
1716D
Chip Move
brute force
,
dp
,
math
2000
x5040
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