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Codeforces Round 945 (Div. 2)
43:38:16
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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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Custom test
Problems
#
Name
1938D
Bánh Bò
3300
x77
1938C
Bit Counting Sequence
1900
x1261
1938B
Attraction Score
3000
x147
1938A
Antiparticle Antiphysics
3500
x37
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13136
1937A
Shuffle Party
implementation
,
math
800
x21500
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x67
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x96
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x418
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1101
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2456
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6587
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x394
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1173
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x7350
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7156
1935B
Informatics in MAC
constructive algorithms
1200
x16509
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25514
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x183
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1195
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3084
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6057
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16715
1934A
Too Min Too Max
greedy
,
math
800
x23442
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x867
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2203
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9749
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17865
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20563
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x30007
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35524
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x882
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3410
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6829
1932D
Card Game
greedy
,
implementation
1400
x9938
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13735
1932B
Chaya Calendar
number theory
1100
x18454
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26799
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2454
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x6974
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13396
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15900
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26146
1931B
Make Equal
greedy
800
x30064
1931A
Recovering a Small String
brute force
,
strings
800
x33621
1930I
Counting Is Fun
combinatorics
3500
x50
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x123
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x253
1930F
Maximize the Difference
bitmasks
,
brute force
,
dfs and similar
2700
x614
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x987
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2371
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3701
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6426
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x13665
1930A
Maximise The Score
greedy
,
sortings
800
x17189
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1634
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1518
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4184
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13292
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23819
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28952
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x210
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1554
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3758
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7504
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15330
1928A
Rectangle Cutting
geometry
,
math
800
x21227
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1494
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3814
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12453
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18360
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25642
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30470
1927A
Make it White
greedy
,
strings
800
x39806
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2970
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1496
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10089
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13654
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x23296
1926B
Vlad and Shapes
geometry
,
implementation
800
x29898
1926A
Vlad and the Best of Five
implementation
800
x42275
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3232
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18265
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27179
1924F
Anti-Proxy Attendance
constructive algorithms
,
dp
,
interactive
,
ternary search
3500
x129
1924E
Paper Cutting Again
combinatorics
,
probabilities
3100
x394
1924D
Balanced Subsequences
combinatorics
,
dp
,
math
2700
x778
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1046
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2283
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12375
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x332
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3202
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5928
1923C
Find B
constructive algorithms
,
greedy
1400
x13202
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x16201
1923A
Moving Chips
greedy
,
implementation
800
x23299
1922F
Replace on Segment
dp
,
graph matchings
2500
x1169
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x7057
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5239
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16913
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