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Codeforces Round 986 (Div. 2)
11:51:07
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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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Problems
#
Name
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
x5506
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4136
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x1130
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9381
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x12388
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x784
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4097
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x610
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1235
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x5993
2029G
Balanced Problem
data structures
,
dp
x51
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
x1733
2029C
New Rating
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
x3063
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1184
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x8281
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
2700
x131
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3708
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8083
2025G
Variable Damage
data structures
,
flows
3000
x122
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5683
2023F
Hills and Pits
data structures
,
greedy
,
math
,
matrices
3500
x52
2022E2
Billetes MX (Hard Version)
binary search
,
combinatorics
,
data structures
,
dsu
,
graphs
2600
x344
2021E3
Digital Village (Extreme Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
math
,
trees
2800
x408
2021E2
Digital Village (Hard Version)
data structures
,
dp
,
dsu
,
graphs
,
math
,
trees
2500
x779
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1441
2021C2
Adjust The Presentation (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1900
x3487
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18337
2018E2
Complex Segments (Hard Version)
binary search
,
data structures
,
divide and conquer
,
dsu
,
greedy
,
math
,
sortings
3400
x110
2018E1
Complex Segments (Easy Version)
binary search
,
data structures
,
divide and conquer
,
dsu
,
greedy
,
math
,
sortings
3300
x145
2018D
Max Plus Min Plus Size
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
matrices
,
sortings
2200
x1560
2018B
Speedbreaker
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1900
x3855
2014H
Robin Hood Archery
data structures
,
divide and conquer
,
greedy
,
hashing
1900
x3406
2014G
Milky Days
brute force
,
data structures
,
greedy
,
implementation
2200
x1244
2014D
Robert Hood and Mrs Hood
brute force
,
data structures
,
greedy
,
sortings
1400
x11867
2013F2
Game in Tree (Hard Version)
binary search
,
data structures
,
trees
3500
x101
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x464
2011I
Stack and Queue
*special problem
,
data structures
,
divide and conquer
x14
2011F
Good Subarray
*special problem
,
data structures
,
greedy
x113
2009G3
Yunli's Subarray Queries (extreme version)
data structures
,
dp
,
implementation
2700
x310
2009G2
Yunli's Subarray Queries (hard version)
binary search
,
data structures
,
dp
2200
x1181
2009G1
Yunli's Subarray Queries (easy version)
binary search
,
data structures
,
two pointers
1900
x3715
2009F
Firefly's Queries
bitmasks
,
data structures
,
flows
,
math
1700
x6399
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x9835
2007B
Index and Maximum Value
data structures
,
greedy
900
x20982
2006E
Iris's Full Binary Tree
brute force
,
data structures
,
dfs and similar
,
trees
3100
x218
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x669
2006C
Eri and Expanded Sets
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
2300
x1618
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x3268
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x782
2005D
Alter the GCD
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
number theory
2400
x853
2004G
Substring Compression
data structures
,
dp
,
matrices
3200
x300
2004F
Make a Palindrome
binary search
,
brute force
,
data structures
,
greedy
,
math
2600
x1152
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x10635
2003F
Turtle and Three Sequences
brute force
,
data structures
,
dp
,
greedy
,
math
,
probabilities
,
two pointers
2800
x468
2003E2
Turtle and Inversions (Hard Version)
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
two pointers
2700
x511
2002E
Cosmic Rays
brute force
,
data structures
,
dp
2300
x2421
2002D2
DFS Checker (Hard Version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
2300
x2372
2002D1
DFS Checker (Easy Version)
brute force
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
1900
x4305
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x4986
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1645
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x13161
2000C
Numeric String Template
data structures
,
strings
1000
x25168
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x687
1998E1
Eliminating Balls With Merging (Easy Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
2200
x1820
1998D
Determine Winning Islands in Race
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
2100
x3285
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x3109
1997C
Even Positions
constructive algorithms
,
data structures
,
greedy
1100
x21907
1996G
Penacony
brute force
,
data structures
,
graphs
,
greedy
,
hashing
2200
x1748
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x9720
1995E2
Let Me Teach You a Lesson (Hard Version)
data structures
,
dp
,
matrices
,
two pointers
2900
x300
1995E1
Let Me Teach You a Lesson (Easy Version)
2-sat
,
data structures
,
dp
,
matrices
,
two pointers
2700
x378
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8728
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
2800
x289
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x858
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x919
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5939
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1421
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x3384
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x1081
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1488
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x22780
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x26540
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
2200
x1521
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x5581
1985F
Final Boss
binary search
,
data structures
1500
x15260
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x1192
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x8179
1982F
Sorting Problem Again
binary search
,
data structures
,
sortings
2600
x947
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x7133
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x17502
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x269
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x900
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x1243
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x3735
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x10488
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x1438
1978F
Large Graph
data structures
,
dfs and similar
,
dsu
,
graphs
,
number theory
,
two pointers
2400
x1322
1978E
Computing Machine
brute force
,
data structures
,
dp
,
greedy
,
implementation
2000
x3806
1978D
Elections
data structures
,
greedy
,
implementation
,
math
1600
x11266
1978C
Manhattan Permutations
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1300
x14925
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