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Codeforces Round (Div. 2)
4 days
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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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Status
Standings
Custom test
Problems
#
Name
1739E
Cleaning Robot
bitmasks
,
dp
2400
x1190
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4969
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8848
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21828
1739A
Immobile Knight
implementation
800
x22434
1738H
Palindrome Addicts
data structures
,
strings
3300
x232
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x415
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1192
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1489
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3381
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10867
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x15143
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13435
1737G
Ela Takes Dancing Class
binary search
,
data structures
3500
x111
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x122
1737E
Ela Goes Hiking
combinatorics
,
dp
,
math
,
probabilities
2500
x906
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1821
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5630
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9266
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x10015
1736E
Swap and Take
dp
,
greedy
2600
x669
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2422
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1258
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14732
1736B
Playing with GCD
math
,
number theory
1200
x17543
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22557
1735F
Pebbles and Beads
data structures
,
geometry
2900
x219
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1031
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5380
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9689
1735B
Tea with Tangerines
greedy
,
math
900
x17898
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20015
1734F
Zeros and Ones
bitmasks
,
divide and conquer
,
dp
,
math
2500
x777
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2827
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6144
1734C
Removing Smallest Multiples
greedy
,
math
1200
x17536
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15648
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20896
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1110
1733D2
Zero-One (Hard Version)
dp
,
greedy
2000
x4063
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13113
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15301
1733B
Rule of League
constructive algorithms
,
math
900
x19436
1733A
Consecutive Sum
greedy
,
sortings
800
x20749
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x419
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1379
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8454
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2490
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5686
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x14608
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14640
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x669
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2720
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6901
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9193
1731B
Kill Demodogs
greedy
,
math
1100
x17367
1731A
Joey Takes Money
greedy
,
math
800
x22230
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x422
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x618
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2615
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16243
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x12194
1730A
Planets
data structures
,
greedy
,
sortings
800
x22688
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2102
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4065
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6849
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x19602
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x19626
1729B
Decode String
greedy
,
strings
800
x29660
1729A
Two Elevators
math
800
x39524
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x435
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x415
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1673
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6989
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15540
1728B
Best Permutation
constructive algorithms
,
greedy
800
x19988
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24446
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
x1368
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3596
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12153
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14858
1726A
Mainak and Array
greedy
,
math
900
x20582
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2910
1725L
Lemper Cooking Competition
data structures
2400
x888
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x595
1725J
Journey
dp
,
trees
2500
x367
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x193
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2541
1725G
Garage
binary search
,
geometry
,
math
1500
x5715
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x949
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x449
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x119
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1571
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x12481
1725A
Accumulation of Dominoes
math
800
x9135
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10764
1722F
L-shapes
dfs and similar
,
implementation
1700
x6681
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