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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
2 days
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Difficulty:
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implementation
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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Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x4653
2038M
Royal Flush
dp
,
implementation
2800
x145
2038J
Waiting for...
greedy
,
implementation
800
x3758
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x1310
2038D
Divide OR Conquer
bitmasks
,
data structures
,
dp
,
implementation
2400
x367
2037B
Intercepted Inputs
brute force
,
implementation
800
x16263
2037A
Twice
implementation
800
x21003
2036D
I Love 1543
brute force
,
implementation
,
matrices
1300
x11318
2036C
Anya and 1100
brute force
,
implementation
1100
x16063
2036A
Quintomania
implementation
800
x29960
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1485
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4364
2035A
Sliding
implementation
,
math
800
x14675
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32610
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x920
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4461
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15320
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20009
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1471
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x671
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1310
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x6187
2028F
Alice's Adventures in Addition
bitmasks
,
brute force
,
dp
,
implementation
2700
x280
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x2226
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8231
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13432
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1278
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x4621
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18311
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
2700
x169
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3917
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8495
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5859
2025C
New Game
binary search
,
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14395
2023C
C+K+S
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
,
strings
2400
x940
2022D1
Asesino (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
implementation
,
interactive
1900
x2797
2022C
Gerrymandering
dp
,
implementation
1800
x3836
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13671
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1477
2021D
Boss, Thirsty
dp
,
greedy
,
implementation
2500
x674
2021C2
Adjust The Presentation (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1900
x3544
2020C
Bitwise Balancing
bitmasks
,
hashing
,
implementation
,
math
,
schedules
,
ternary search
1400
x14356
2019B
All Pairs Segments
implementation
,
math
1200
x13785
2018D
Max Plus Min Plus Size
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
matrices
,
sortings
2200
x1585
2018B
Speedbreaker
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1900
x3923
2018A
Cards Partition
2-sat
,
brute force
,
greedy
,
implementation
,
math
1600
x10109
2014G
Milky Days
brute force
,
data structures
,
greedy
,
implementation
2200
x1268
2014A
Robin Helps
greedy
,
implementation
800
x36891
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x473
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19754
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16727
2009G3
Yunli's Subarray Queries (extreme version)
data structures
,
dp
,
implementation
2700
x330
2009C
The Legend of Freya the Frog
implementation
,
math
1100
x25714
2009B
osu!mania
brute force
,
implementation
800
x41558
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x9962
2006F
Dora's Paint
brute force
,
combinatorics
,
constructive algorithms
,
graphs
,
implementation
3500
x118
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x673
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x795
2005E1
Subtangle Game (Easy Version)
dp
,
games
,
greedy
,
implementation
2100
x2685
2005D
Alter the GCD
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
number theory
2400
x873
2005C
Lazy Narek
dp
,
implementation
,
strings
1800
x7016
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x10718
2004A
Closest Point
implementation
,
math
800
x30249
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
math
2100
x3995
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19420
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x5024
2001A
Make All Equal
greedy
,
implementation
800
x29514
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1655
2000F
Color Rows and Columns
dp
,
greedy
,
implementation
,
math
1900
x5391
2000D
Right Left Wrong
greedy
,
implementation
,
two pointers
1200
x22947
2000A
Primary Task
implementation
,
math
,
strings
800
x37302
1999E
Triple Operations
dp
,
implementation
,
math
1300
x18635
1999D
Slavic's Exam
greedy
,
implementation
,
strings
1100
x26959
1999C
Showering
greedy
,
implementation
800
x35046
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x32365
1999A
A+B Again?
implementation
,
math
800
x55926
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x693
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x6123
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23930
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x3131
1997A
Strong Password
brute force
,
implementation
,
strings
800
x29219
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x9811
1996B
Scale
greedy
,
implementation
800
x32575
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x8581
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x24227
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20230
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x542
1993C
Light Switches
implementation
,
math
1400
x13623
1993A
Question Marks
greedy
,
implementation
800
x29403
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x9162
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x20435
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x611
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2325
1991A
Maximize the Last Element
greedy
,
implementation
800
x21851
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x6316
1989A
Catch the Coin
implementation
800
x26404
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1424
1988B
Make Majority
greedy
,
implementation
900
x22801
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x23267
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x15237
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