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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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2-sat
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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
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number theory
probabilities
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shortest paths
sortings
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strings
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trees
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Custom test
Problems
#
Name
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x19801
1681B
Card Trick
implementation
,
math
800
x19841
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x19901
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x19910
835A
Key races
math
800
x19953
513A
Game
constructive algorithms
,
math
800
x19968
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20020
1257A
Two Rival Students
greedy
,
math
800
x20037
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20143
1482A
Prison Break
math
800
x20146
1392A
Omkar and Password
greedy
,
math
800
x20197
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20221
1605A
A.M. Deviation
math
,
number theory
800
x20360
832A
Sasha and Sticks
games
,
math
800
x20393
1615A
Closing The Gap
greedy
,
math
800
x20527
1684B
Z mod X = C
constructive algorithms
,
math
800
x20622
1422A
Fence
geometry
,
math
800
x20652
746A
Compote
implementation
,
math
800
x20671
1300A
Non-zero
implementation
,
math
800
x20704
1530A
Binary Decimal
greedy
,
math
800
x20780
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20782
1269A
Equation
brute force
,
math
800
x20932
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21026
1680A
Minimums and Maximums
brute force
,
math
800
x21041
1838A
Blackboard List
constructive algorithms
,
math
800
x21097
1716B
Permutation Chain
constructive algorithms
,
math
800
x21207
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21224
1928A
Rectangle Cutting
geometry
,
math
800
x21300
1223A
CME
math
800
x21326
1061A
Coins
greedy
,
implementation
,
math
800
x21348
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21393
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x21415
1834A
Unit Array
greedy
,
math
800
x21420
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x21481
1708A
Difference Operations
greedy
,
math
800
x21496
1937A
Shuffle Party
implementation
,
math
800
x21620
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21652
1759B
Lost Permutation
math
800
x21674
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21732
1452A
Robot Program
math
800
x21793
1249A
Yet Another Dividing into Teams
math
800
x21843
1905A
Constructive Problems
constructive algorithms
,
math
800
x21879
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22004
1731A
Joey Takes Money
greedy
,
math
800
x22147
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22289
294A
Shaass and Oskols
implementation
,
math
800
x22313
1822C
Bun Lover
math
800
x22364
1436A
Reorder
math
800
x22435
1492A
Three swimmers
math
800
x22456
1806A
Walking Master
geometry
,
greedy
,
math
800
x22474
1647A
Madoka and Math Dad
implementation
,
math
800
x22507
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22569
1498A
GCD Sum
brute force
,
math
800
x22680
1566A
Median Maximization
binary search
,
greedy
,
math
800
x22781
1744B
Even-Odd Increments
implementation
,
math
800
x22889
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x23010
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23019
1828A
Divisible Array
constructive algorithms
,
math
800
x23052
1861A
Prime Deletion
constructive algorithms
,
math
800
x23166
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23223
1895A
Treasure Chest
math
800
x23497
1102A
Integer Sequence Dividing
math
800
x23498
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23503
1748A
The Ultimate Square
math
800
x23549
1934A
Too Min Too Max
greedy
,
math
800
x23559
1206A
Choose Two Numbers
math
,
sortings
800
x23559
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23672
1657A
Integer Moves
brute force
,
math
800
x23716
1514A
Perfectly Imperfect Array
math
,
number theory
800
x23823
1345A
Puzzle Pieces
math
800
x23828
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23894
1594A
Consecutive Sum Riddle
math
800
x23894
1451A
Subtract or Divide
greedy
,
math
800
x23935
1646A
Square Counting
math
800
x24008
1391A
Suborrays
constructive algorithms
,
math
800
x24017
1883A
Morning
math
800
x24091
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24129
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x24278
1917A
Least Product
constructive algorithms
,
math
800
x24282
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24562
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24603
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24626
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24751
1741B
Funny Permutation
constructive algorithms
,
math
800
x24839
1945A
Setting up Camp
greedy
,
math
800
x24967
1304A
Two Rabbits
math
800
x25032
1719A
Chip Game
games
,
math
800
x25043
1525A
Potion-making
math
,
number theory
800
x25087
1517A
Sum of 2050
greedy
,
math
800
x25130
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25208
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25353
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25566
1901A
Line Trip
greedy
,
math
800
x25644
1674B
Dictionary
combinatorics
,
math
800
x25675
1674A
Number Transformation
constructive algorithms
,
math
800
x25709
1814A
Coins
implementation
,
math
800
x25890
1455A
Strange Functions
math
,
number theory
800
x26054
1560C
Infinity Table
implementation
,
math
800
x26137
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26181
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26592
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