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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
*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
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x25732
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25753
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x25916
1382A
Common Subsequence
brute force
800
x26093
1391B
Fix You
brute force
,
greedy
,
implementation
800
x26115
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26155
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26182
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26307
1948A
Special Characters
brute force
,
constructive algorithms
800
x26452
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26593
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x26636
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26689
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x26769
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26850
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26982
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27110
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x27135
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27304
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27343
1555A
PizzaForces
brute force
,
math
900
x27347
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27498
330A
Cakeminator
brute force
,
implementation
800
x27513
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x27535
1881A
Don't Try to Count
brute force
,
strings
800
x27734
1788A
One and Two
brute force
,
implementation
,
math
800
x27807
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27833
1968A
Maximize?
brute force
,
math
,
number theory
800
x27835
1698A
XOR Mixup
bitmasks
,
brute force
800
x27945
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28192
1772B
Matrix Rotation
brute force
,
implementation
800
x28236
1853A
Desorting
brute force
,
greedy
,
math
800
x28289
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28297
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28568
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28576
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28706
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28803
711A
Bus to Udayland
brute force
,
implementation
800
x28855
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28920
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29095
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29150
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29677
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29791
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x29905
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31151
1462C
Unique Number
brute force
,
greedy
,
math
900
x31375
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31535
1633A
Div. 7
brute force
800
x31963
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32667
894A
QAQ
brute force
,
dp
800
x33011
1931A
Recovering a Small String
brute force
,
strings
800
x33765
214A
System of Equations
brute force
800
x33767
320A
Magic Numbers
brute force
,
greedy
900
x33830
1703C
Cypher
brute force
,
implementation
,
strings
800
x34296
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34499
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34691
1538A
Stone Game
brute force
,
dp
,
greedy
800
x35834
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36096
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36419
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36968
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37170
509A
Maximum in Table
brute force
,
implementation
800
x37336
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37460
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38825
1941A
Rudolf and the Ticket
brute force
,
math
800
x39231
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x40130
935A
Fafa and his Company
brute force
,
implementation
800
x41642
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x43055
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44404
1873B
Good Kid
brute force
,
greedy
,
math
800
x44704
1343A
Candies
brute force
,
math
900
x46431
1535A
Fair Playoff
brute force
,
implementation
800
x46623
1475B
New Year's Number
brute force
,
dp
,
math
900
x46649
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x48156
1873A
Short Sort
brute force
,
implementation
800
x49182
363B
Fence
brute force
,
dp
1100
x49430
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49862
80A
Panoramix's Prediction
brute force
800
x49878
1512A
Spy Detected!
brute force
,
implementation
800
x60243
189A
Cut Ribbon
brute force
,
dp
1300
x63000
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x63343
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67723
155A
I_love_\%username\%
brute force
800
x70931
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71296
268A
Games
brute force
800
x81362
25A
IQ test
brute force
1300
x81573
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84314
479A
Expression
brute force
,
math
1000
x89214
122A
Lucky Division
brute force
,
number theory
1000
x116713
271A
Beautiful Year
brute force
800
x128446
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168839
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x194623
231A
Team
brute force
,
greedy
800
x301298
4A
Watermelon
brute force
,
math
800
x484645
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