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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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brute force
combine-tags-by-or
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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
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x484462
231A
Team
brute force
,
greedy
800
x301157
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x194544
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168768
271A
Beautiful Year
brute force
800
x128391
122A
Lucky Division
brute force
,
number theory
1000
x116672
479A
Expression
brute force
,
math
1000
x89188
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84300
25A
IQ test
brute force
1300
x81552
268A
Games
brute force
800
x81330
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71255
155A
I_love_\%username\%
brute force
800
x70902
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67690
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x63296
189A
Cut Ribbon
brute force
,
dp
1300
x62985
1512A
Spy Detected!
brute force
,
implementation
800
x60217
80A
Panoramix's Prediction
brute force
800
x49857
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49853
363B
Fence
brute force
,
dp
1100
x49408
1873A
Short Sort
brute force
,
implementation
800
x49153
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x48132
1475B
New Year's Number
brute force
,
dp
,
math
900
x46623
1535A
Fair Playoff
brute force
,
implementation
800
x46605
1343A
Candies
brute force
,
math
900
x46421
1873B
Good Kid
brute force
,
greedy
,
math
800
x44682
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44396
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x43040
935A
Fafa and his Company
brute force
,
implementation
800
x41637
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x40120
1941A
Rudolf and the Ticket
brute force
,
math
800
x39202
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38812
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37448
509A
Maximum in Table
brute force
,
implementation
800
x37327
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37161
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36959
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36412
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36088
1538A
Stone Game
brute force
,
dp
,
greedy
800
x35830
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34681
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34494
1703C
Cypher
brute force
,
implementation
,
strings
800
x34292
320A
Magic Numbers
brute force
,
greedy
900
x33819
214A
System of Equations
brute force
800
x33752
1931A
Recovering a Small String
brute force
,
strings
800
x33750
894A
QAQ
brute force
,
dp
800
x33007
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32651
1633A
Div. 7
brute force
800
x31959
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31529
1462C
Unique Number
brute force
,
greedy
,
math
900
x31363
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31149
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x29899
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29783
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29674
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29139
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29081
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28910
711A
Bus to Udayland
brute force
,
implementation
800
x28852
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28801
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28701
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28570
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28568
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28294
1772B
Matrix Rotation
brute force
,
implementation
800
x28234
1853A
Desorting
brute force
,
greedy
,
math
800
x28231
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28189
1698A
XOR Mixup
bitmasks
,
brute force
800
x27940
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27831
1788A
One and Two
brute force
,
implementation
,
math
800
x27790
1968A
Maximize?
brute force
,
math
,
number theory
800
x27716
1881A
Don't Try to Count
brute force
,
strings
800
x27704
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x27531
330A
Cakeminator
brute force
,
implementation
800
x27507
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27497
1555A
PizzaForces
brute force
,
math
900
x27343
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27333
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27300
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x27124
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27105
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26971
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26848
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x26757
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26667
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x26630
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26580
1948A
Special Characters
brute force
,
constructive algorithms
800
x26442
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26286
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26180
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26152
1391B
Fix You
brute force
,
greedy
,
implementation
800
x26109
1382A
Common Subsequence
brute force
800
x26093
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x25910
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25736
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x25731
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25641
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x25539
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25518
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x25451
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25194
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24702
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x24611
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