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Codeforces Round 943 (Div. 3)
09:54:49
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Difficulty:
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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
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17613
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23230
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x469
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x611
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3504
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6813
1945D
Seraphim the Owl
dp
,
greedy
1300
x11882
1945C
Left and Right Houses
brute force
1200
x12557
1945B
Fireworks
math
,
number theory
900
x19299
1945A
Setting up Camp
greedy
,
math
800
x24304
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x14016
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20889
1943F
Minimum Hamming Distance
dp
3500
x72
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x212
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x338
1943D2
Counting Is Fun (Hard Version)
combinatorics
,
dp
2800
x567
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1204
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1744
1943B
Non-Palindromic Substring
hashing
,
implementation
,
math
,
strings
2000
x3179
1943A
MEX Game 1
games
,
greedy
1300
x14989
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x57
1942G
Bessie and Cards
combinatorics
,
dp
,
math
2800
x358
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x545
1942E
Farm Game
combinatorics
,
games
2300
x1413
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2377
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5404
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9342
1942B
Bessie and MEX
constructive algorithms
,
math
1100
x12085
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x15392
1941G
Rudolf and Subway
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2000
x2895
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5107
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8037
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x16392
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29362
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26138
1941A
Rudolf and the Ticket
brute force
,
math
800
x38572
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x123
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x32
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x173
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x78
1939D
Big Persimmon
*special problem
,
dp
,
games
x59
1939C
More Gifts
*special problem
,
dfs and similar
,
two pointers
x272
1939B
Evidence Board
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
x208
1939A
Draw Polygon Lines
*special problem
,
constructive algorithms
,
dp
,
geometry
,
interactive
x14
1938M
Zig-zag
3500
x44
1938L
XOR Operations
2800
x245
1938K
Tree Quiz
2400
x527
1938J
There and Back Again
2100
x1103
1938I
Symmetric Boundary
2800
x52
1938H
Pho Restaurant
1600
x1844
1938G
Personality Test
2300
x861
1938F
Forming Groups
2400
x632
1938E
Duplicates
2200
x848
1938D
Bánh Bò
3300
x77
1938C
Bit Counting Sequence
1900
x1239
1938B
Attraction Score
3000
x146
1938A
Antiparticle Antiphysics
3500
x36
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12946
1937A
Shuffle Party
implementation
,
math
800
x21310
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x66
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x94
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x407
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1063
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2389
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6502
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x386
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1154
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x7256
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7056
1935B
Informatics in MAC
constructive algorithms
1200
x16286
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25292
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x181
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1175
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3036
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5990
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16479
1934A
Too Min Too Max
greedy
,
math
800
x23210
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x853
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2174
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9596
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17586
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20299
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29686
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35180
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x864
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3336
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6698
1932D
Card Game
greedy
,
implementation
1400
x9789
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13505
1932B
Chaya Calendar
number theory
1100
x18225
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26448
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2418
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x6875
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13190
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15688
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25874
1931B
Make Equal
greedy
800
x29835
1931A
Recovering a Small String
brute force
,
strings
800
x33384
1930I
Counting Is Fun
combinatorics
3500
x49
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x118
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