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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
2 days
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binary search
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
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x8258
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x305
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x442
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2821
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x6100
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x9789
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x145
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x516
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2964
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x453
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x8318
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x8261
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6862
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x11338
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x7172
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x15095
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x17713
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x21878
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x12080
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x378
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x6900
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x537
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x1009
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5664
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4854
1915C
Can I Square?
binary search
,
implementation
800
x43488
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x329
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x15202
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x90
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x14581
1906D
Spaceship Exploration
binary search
,
geometry
2800
x124
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x13602
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x15841
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x651
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5824
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x4206
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x14619
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x155
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x7126
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x293
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5856
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x9768
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x195
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1587
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x4014
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x13597
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x385
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x983
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1775
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x3072
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x16341
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x12809
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x5477
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x11354
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2422
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1200
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x13169
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x141
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x139
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x15827
1873E
Building an Aquarium
binary search
,
sortings
1100
x27526
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x13987
1870F
Lazy Numbers
binary search
,
math
2900
x496
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x11624
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x728
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x451
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1731
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x137
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2920
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x6371
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x17422
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x21005
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x205
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x17104
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x7082
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x11793
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x12628
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x547
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x17582
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x8158
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x3297
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x23806
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x730
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1682
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x10695
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1647
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2649
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x15466
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x912
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x7120
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7929
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x14455
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x404
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x12617
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x13913
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x320
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2233
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x953
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2298
1832F
Zombies
binary search
,
dp
3200
x279
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