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Codeforces Round 950 (Div. 3)
44:14:02
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Difficulty:
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data structures
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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#
Name
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1663
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15383
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
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12112
1725L
Lemper Cooking Competition
data structures
2400
x882
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x588
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x942
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x437
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10173
1722C
Word Game
data structures
,
implementation
800
x29717
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x740
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1759
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20805
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12921
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x146
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x290
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1532
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x5034
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1027
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4032
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1621
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8396
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7211
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8784
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29483
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1525
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x306
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1185
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4301
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2367
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2481
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8137
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x21984
1707E
Replace
binary search
,
data structures
3500
x564
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5566
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2409
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1660
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1983
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18460
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24572
1703B
ICPC Balloons
data structures
,
implementation
800
x46002
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4368
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x8007
1702C
Train and Queries
data structures
,
greedy
1100
x21587
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x892
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5519
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10520
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1097
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3044
1698C
3SUM Closure
brute force
,
data structures
1300
x18000
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14009
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x266
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5218
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10439
1693E
Outermost Maximums
data structures
,
greedy
3400
x374
1693D
Decinc Dividing
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
2800
x782
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7133
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16205
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1762
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5533
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3273
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25550
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4051
1689B
Mystic Permutation
data structures
,
greedy
900
x17159
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x559
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1345
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x143
1684F
Diverse Segments
data structures
,
two pointers
2600
x845
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3062
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x289
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1567
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x704
1679C
Rooks Defenders
data structures
,
implementation
1400
x9941
1679B
Stone Age Problem
data structures
,
implementation
1200
x17183
1677E
Tokitsukaze and Beautiful Subsegments
data structures
2900
x507
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4030
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8153
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x10152
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15956
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4896
1672I
PermutationForces
data structures
,
greedy
3000
x138
1672H
Zigu Zagu
constructive algorithms
,
data structures
,
greedy
2700
x917
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9558
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23504
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x17061
1667B
Optimal Partition
data structures
,
dp
2100
x3498
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1430
1662L
Il Derby della Madonnina
data structures
,
dp
,
math
x999
1662F
Antennas
data structures
,
dfs and similar
,
graphs
,
graphs
,
implementation
,
implementation
,
shortest paths
,
shortest paths
x974
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x915
1661D
Progressions Covering
data structures
,
greedy
1900
x4548
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x2614
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3898
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1024
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2451
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x419
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17833
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x358
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x1061
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