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Codeforces Round 950 (Div. 3)
34:52:04
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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
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x4614
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
x237
1976A
Verify Password
implementation
,
sortings
x22453
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x13203
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x15130
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3099
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x2617
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x25706
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
2500
x597
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x6561
1971G
XOUR
data structures
,
dsu
,
sortings
1400
x7181
1971E
Find the Car
binary search
,
math
,
sortings
1500
x10773
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x21020
1971A
My First Sorting Problem
implementation
,
sortings
800
x35874
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x2856
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x3647
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x10106
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x11118
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x282
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7482
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x24666
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x5172
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x706
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9982
1949F
Dating
greedy
,
sortings
,
trees
2200
x799
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x2125
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x24122
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3683
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2492
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5315
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x125
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x33
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x177
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1129
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7300
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x18190
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35929
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3495
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13679
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6503
1930A
Maximise The Score
greedy
,
sortings
800
x17392
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x29360
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15618
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3879
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2310
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x19281
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20252
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19491
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3635
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x793
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1596
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x22371
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5524
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11876
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11399
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11291
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18646
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1910
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x10153
1907F
Shift and Reverse
greedy
,
sortings
1800
x4466
1906F
Maximize The Value
data structures
,
sortings
2100
x948
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3897
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10906
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x13220
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x25343
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1398
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2945
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x14142
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2076
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x312
1896E
Permutation Sorting
data structures
,
sortings
2100
x2048
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8786
1896A
Jagged Swaps
sortings
800
x19457
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1470
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19762
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8182
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x779
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11535
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x16118
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18488
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3050
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6830
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1348
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5552
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4932
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2163
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7621
1876A
Helmets in Night Light
greedy
,
sortings
1000
x15216
1873E
Building an Aquarium
binary search
,
sortings
1100
x23543
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6505
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x14699
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19328
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x122
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1323
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2481
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x14860
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2639
1863B
Split Sort
greedy
,
math
,
sortings
1100
x14692
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2691
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19840
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