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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
25:05:25
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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
1949F
Dating
greedy
,
sortings
,
trees
x496
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1221
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x19976
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x2889
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4646
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x110
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x26
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x160
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x946
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6534
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16735
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x34008
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3009
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x12572
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6101
1930A
Maximise The Score
greedy
,
sortings
800
x16372
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x27967
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14548
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3533
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2179
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x18500
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19455
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x18786
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3507
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x712
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1419
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21524
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5178
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11024
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x10858
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x10784
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x17184
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1713
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9607
1907F
Shift and Reverse
greedy
,
sortings
1800
x4218
1906F
Maximize The Value
data structures
,
sortings
2100
x876
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3618
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x9996
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12202
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x22054
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1313
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2794
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13477
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x1985
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x221
1896E
Permutation Sorting
data structures
,
sortings
2100
x1936
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8302
1896A
Jagged Swaps
sortings
800
x17000
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1420
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19395
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x7852
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x762
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10811
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15182
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18149
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2914
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6544
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1291
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5239
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4727
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2088
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7262
1876A
Helmets in Night Light
greedy
,
sortings
1000
x14051
1873E
Building an Aquarium
binary search
,
sortings
1100
x22072
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6258
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x13939
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19028
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x109
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1289
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2438
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x14619
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2560
1863B
Split Sort
greedy
,
math
,
sortings
1100
x14386
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2569
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19331
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x260
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6408
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x23546
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x3969
1857E
Power of Points
math
,
sortings
1500
x11268
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x17281
1857C
Assembly via Minimums
greedy
,
sortings
1200
x22144
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4036
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2832
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9189
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27562
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x10932
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x31030
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x39399
1850A
To My Critics
implementation
,
sortings
800
x49278
1849B
Monsters
greedy
,
math
,
sortings
1000
x21828
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x12960
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x841
1847A
The Man who became a God
greedy
,
sortings
800
x21472
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17630
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x365
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32526
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1215
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x462
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4036
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