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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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math
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
trees
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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x484524
1A
Theatre Square
math
1000
x246874
50A
Domino piling
greedy
,
math
800
x229983
617A
Elephant
math
800
x171248
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168792
69A
Young Physicist
implementation
,
math
1000
x155813
486A
Calculating Function
implementation
,
math
800
x110006
200B
Drinks
implementation
,
math
800
x108416
318A
Even Odds
math
900
x106785
1328A
Divisibility Problem
math
800
x93969
479A
Expression
brute force
,
math
1000
x89197
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x87526
1335A
Candies and Two Sisters
math
800
x79078
1352A
Sum of Round Numbers
implementation
,
math
800
x72547
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71485
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71270
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x71266
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x70327
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67701
581A
Vasya the Hipster
implementation
,
math
800
x67425
1154A
Restoring Three Numbers
math
800
x66688
151A
Soft Drinking
implementation
,
math
800
x66271
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62762
758A
Holiday Of Equality
implementation
,
math
800
x57587
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57204
1475A
Odd Divisor
math
,
number theory
900
x55653
1343B
Balanced Array
constructive algorithms
,
math
800
x53871
9A
Die Roll
math
,
probabilities
800
x52857
1374A
Required Remainder
math
800
x50816
1367B
Even Array
greedy
,
math
800
x50535
1352C
K-th Not Divisible by n
binary search
,
math
1200
x50341
1624A
Plus One on the Subset
math
800
x49938
1433A
Boring Apartments
implementation
,
math
800
x49499
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x49080
1551A
Polycarp and Coins
greedy
,
math
800
x48611
1360A
Minimal Square
greedy
,
math
800
x48198
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48150
1472B
Fair Division
dp
,
greedy
,
math
800
x47712
1283A
Minutes Before the New Year
math
800
x46814
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46763
1475B
New Year's Number
brute force
,
dp
,
math
900
x46629
1343A
Candies
brute force
,
math
900
x46425
1374B
Multiply by 2, divide by 6
math
900
x46164
1426A
Floor Number
implementation
,
math
800
x45723
1676B
Equal Candies
greedy
,
math
,
sortings
800
x45410
1873B
Good Kid
brute force
,
greedy
,
math
800
x44687
1294A
Collecting Coins
math
800
x44478
1371A
Magical Sticks
math
800
x44444
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44398
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x44387
1857A
Array Coloring
greedy
,
math
800
x43853
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43573
584A
Olesya and Rodion
math
1000
x43045
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x43041
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42948
1542A
Odd Set
math
800
x42469
476A
Dreamoon and Stairs
implementation
,
math
1000
x41340
1472A
Cards for Friends
greedy
,
math
800
x40977
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40760
233A
Perfect Permutation
implementation
,
math
800
x40592
1921A
Square
greedy
,
math
800
x40166
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x40079
1296A
Array with Odd Sum
math
800
x39659
1941A
Rudolf and the Ticket
brute force
,
math
800
x39213
1729A
Two Elevators
math
800
x39056
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x39054
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38561
1342A
Road To Zero
greedy
,
math
1000
x38490
1348A
Phoenix and Balance
greedy
,
math
800
x38444
1899A
Game with Integers
games
,
math
,
number theory
800
x38425
1358A
Park Lighting
greedy
,
math
800
x38216
1579A
Casimir's String Solitaire
math
,
strings
800
x37892
1385A
Three Pairwise Maximums
math
800
x37660
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37452
1955A
Yogurt Sale
math
800
x37246
1327A
Sum of Odd Integers
math
1100
x37030
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36964
124A
The number of positions
math
1000
x36429
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x36210
1537A
Arithmetic Array
greedy
,
math
800
x36172
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35739
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35673
1873C
Target Practice
implementation
,
math
800
x35666
1369A
FashionabLee
geometry
,
math
800
x35663
1593A
Elections
math
800
x35634
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x35520
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35489
1950C
Clock Conversion
implementation
,
math
800
x35430
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35377
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x35162
1660A
Vasya and Coins
greedy
,
math
800
x35128
1560B
Who's Opposite?
math
800
x34777
1858A
Buttons
games
,
greedy
,
math
800
x34588
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34494
1624B
Make AP
implementation
,
math
900
x34416
1353C
Board Moves
math
1000
x34269
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33150
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x33029
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32904
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32474
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