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Codeforces Round 946 (Div. 3)
22:02:19
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Difficulty:
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sortings
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
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
x331
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
x5089
1971G
XOUR
data structures
,
dsu
,
sortings
1400
x6120
1971E
Find the Car
binary search
,
math
,
sortings
1500
x9504
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x19135
1971A
My First Sorting Problem
implementation
,
sortings
800
x32930
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x2221
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x3360
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x9420
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x10478
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x266
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7264
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x24072
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x4962
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x697
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9735
1949F
Dating
greedy
,
sortings
,
trees
2200
x778
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x1945
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23717
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3615
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2452
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5246
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x124
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
x174
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1107
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7192
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17952
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35617
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3429
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13460
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6445
1930A
Maximise The Score
greedy
,
sortings
800
x17239
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x29041
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15411
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3830
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2293
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x19109
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20069
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19371
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3609
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x777
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1566
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x22219
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5461
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11705
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11299
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11199
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18347
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1893
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x10019
1907F
Shift and Reverse
greedy
,
sortings
1800
x4412
1906F
Maximize The Value
data structures
,
sortings
2100
x941
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3846
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10751
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12960
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x24500
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1382
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2920
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13991
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2062
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x309
1896E
Permutation Sorting
data structures
,
sortings
2100
x2027
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8669
1896A
Jagged Swaps
sortings
800
x18972
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1461
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19674
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8116
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x775
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11385
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15909
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18417
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3024
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6771
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1338
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5489
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4898
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2143
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7553
1876A
Helmets in Night Light
greedy
,
sortings
1000
x14961
1873E
Building an Aquarium
binary search
,
sortings
1100
x23212
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6447
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x14516
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19256
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x120
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1316
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2469
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x14794
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2620
1863B
Split Sort
greedy
,
math
,
sortings
1100
x14615
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2667
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19733
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x265
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6572
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x24456
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4099
1857E
Power of Points
math
,
sortings
1500
x11560
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x17807
1857C
Assembly via Minimums
greedy
,
sortings
1200
x23121
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4161
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