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Codeforces Round 1101 (Div. 2)
01:22:55
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constructive algorithms
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
2044H
Hard Demon Problem
constructive algorithms
,
data structures
,
dp
,
implementation
,
math
2100
x2613
2044D
Harder Problem
constructive algorithms
,
greedy
,
math
1100
x24217
2041E
Beautiful Array
constructive algorithms
,
math
1200
x9945
2040D
Non Prime Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
number theory
,
trees
,
two pointers
1900
x5876
2040C
Ordered Permutations
bitmasks
,
combinatorics
,
constructive algorithms
,
greedy
,
math
,
two pointers
1600
x10855
2040B
Paint a Strip
constructive algorithms
,
greedy
,
math
1000
x24231
2039H2
Cool Swap Walk (Hard Version)
constructive algorithms
,
constructive algorithms
,
constructive algorithms
,
implementation
,
sortings
3500
x94
2039H1
Cool Swap Walk (Easy Version)
constructive algorithms
,
implementation
,
sortings
3500
x102
2039D
Shohag Loves GCD
constructive algorithms
,
greedy
,
math
,
number theory
1700
x7022
2039B
Shohag Loves Strings
constructive algorithms
,
greedy
,
implementation
,
strings
1000
x17391
2039A
Shohag Loves Mod
constructive algorithms
,
number theory
800
x18159
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x2983
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x25652
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1688
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x9635
2035H
Peak Productivity Forces
constructive algorithms
3500
x100
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1975
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x11605
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x20666
2034G1
Simurgh's Watch (Easy Version)
constructive algorithms
,
greedy
,
implementation
,
sortings
3500
x78
2034E
Permutations Harmony
combinatorics
,
constructive algorithms
,
greedy
,
hashing
,
math
2200
x2031
2034D
Darius' Wisdom
constructive algorithms
,
greedy
,
implementation
,
sortings
1600
x6655
2034C
Trapped in the Witch's Labyrinth
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
1400
x9200
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x28928
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x41281
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x1405
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x6227
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x20700
2031F
Penchick and Even Medians
binary search
,
constructive algorithms
,
interactive
,
probabilities
2800
x458
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x15812
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x21098
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x23768
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x27643
2029F
Palindrome Everywhere
constructive algorithms
,
graphs
,
greedy
2500
x854
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x3554
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
1900
x3950
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x11796
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x3768
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x12721
2026B
Black Cells
binary search
,
brute force
,
constructive algorithms
,
greedy
1300
x16575
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x20341
2025F
Choose Your Queries
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2700
x1069
2024B
Buying Lemonade
binary search
,
constructive algorithms
,
sortings
1100
x17130
2023C
C+K+S
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
,
strings
2400
x1381
2023A
Concatenation of Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1300
x16660
2022E1
Billetes MX (Easy Version)
2-sat
,
binary search
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x767
2022D2
Asesino (Hard Version)
constructive algorithms
,
dp
,
interactive
2700
x833
2022D1
Asesino (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
implementation
,
interactive
1900
x4055
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x17298
2021C2
Adjust The Presentation (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4537
2021C1
Adjust The Presentation (Easy Version)
constructive algorithms
,
greedy
1300
x14184
2013C
Password Cracking
constructive algorithms
,
interactive
,
strings
1400
x14687
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x28382
2013A
Zhan's Blender
constructive algorithms
,
math
800
x31307
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x41963
2006F
Dora's Paint
brute force
,
combinatorics
,
constructive algorithms
,
graphs
,
implementation
3500
x166
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x9481
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x26379
2003C
Turtle and Good Pairs
constructive algorithms
,
greedy
,
sortings
,
strings
1200
x21767
2002B
Removals Game
constructive algorithms
,
games
1000
x23100
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x21345
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x6441
2001B
Generate Permutation
constructive algorithms
800
x26151
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x41964
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x7118
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x28254
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x26178
1997C
Even Positions
constructive algorithms
,
data structures
,
greedy
1100
x25525
1997B
Make Three Regions
constructive algorithms
,
two pointers
1100
x23530
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x10329
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x775
1994F
Stardew Valley
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x1539
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x7558
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x19630
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x22328
1993F1
Dyn-scripted Robot (Easy Version)
brute force
,
chinese remainder theorem
,
constructive algorithms
,
math
,
number theory
2400
x1204
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x734
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x26552
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x10804
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x33364
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x49465
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x171
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x748
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x5144
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x7914
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x17806
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x18961
1990B
Array Craft
constructive algorithms
,
greedy
1200
x19930
1988C
Increasing Sequence with Fixed OR
bitmasks
,
constructive algorithms
,
greedy
1300
x20378
1984G
Magic Trick II
constructive algorithms
,
implementation
,
sortings
3200
x302
1984A
Strange Splitting
constructive algorithms
800
x22906
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x11183
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18464
1983A
Array Divisibility
constructive algorithms
,
math
800
x28158
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
2400
x2155
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1800
x6375
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x13085
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
1300
x21797
1979F
Kostyanych's Theorem
brute force
,
constructive algorithms
,
graphs
,
interactive
2900
x440
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x1828
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