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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
42:21:20
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Difficulty:
—
greedy
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
1950F
0, 1, 2, Tree!
greedy
,
math
,
trees
x2885
1949H
Division Avoidance
greedy
,
math
x40
1949G
Scooter
graphs
,
greedy
x406
1949F
Dating
greedy
,
sortings
,
trees
x490
1949C
Annual Ants' Gathering
dfs and similar
,
greedy
,
trees
x805
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1211
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2169
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x17848
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3043
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x7157
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x14843
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x19810
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x5688
1945D
Seraphim the Owl
dp
,
greedy
1300
x10106
1945A
Setting up Camp
greedy
,
math
800
x20852
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x18657
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x149
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x260
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1465
1943A
MEX Game 1
games
,
greedy
1300
x13268
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4629
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x27598
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x24363
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12157
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x356
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x944
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6112
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x312
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1013
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6511
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1082
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x2824
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5647
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x15539
1934A
Too Min Too Max
greedy
,
math
800
x22127
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16714
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x33980
1932D
Card Game
greedy
,
implementation
1400
x9122
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x25371
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x12560
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x24931
1931B
Make Equal
greedy
800
x29085
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2253
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3500
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6089
1930A
Maximise The Score
greedy
,
sortings
800
x16353
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1401
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12640
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23099
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x27949
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1432
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3536
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14539
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1409
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3530
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17423
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x24702
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x29329
1927A
Make it White
greedy
,
strings
800
x38499
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2677
1926D
Vlad and Division
bitmasks
,
greedy
1300
x12757
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17665
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x26619
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11814
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x293
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5443
1923C
Find B
constructive algorithms
,
greedy
1400
x12177
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x15361
1923A
Moving Chips
greedy
,
implementation
800
x22398
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6796
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16351
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8589
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19449
1921C
Sending Messages
greedy
,
math
900
x26559
1921B
Arranging Cats
greedy
,
implementation
800
x31362
1921A
Square
greedy
,
math
800
x38868
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x18782
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x25966
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x709
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x1958
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3503
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16267
1919B
Plus-Minus Split
greedy
800
x28424
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x710
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x12059
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21507
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28132
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9079
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x383
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2036
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16314
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5173
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x17640
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x26747
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3511
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x10852
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x10778
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x17171
1914C
Quests
greedy
,
math
1100
x19866
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13119
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