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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
23:32:35
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number theory
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
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implementation
interactive
math
matrices
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probabilities
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shortest paths
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ternary search
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Name
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2741
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2730
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2708
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2683
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2671
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2663
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2633
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2626
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2621
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2617
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2597
1154G
Minimum Possible LCM
brute force
,
greedy
,
math
,
number theory
2200
x2592
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2580
1610D
Not Quite Lee
combinatorics
,
dp
,
math
,
number theory
2000
x2552
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2543
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2525
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2516
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2509
1182E
Product Oriented Recurrence
dp
,
math
,
matrices
,
number theory
2300
x2506
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x2494
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2452
955C
Sad powers
binary search
,
math
,
number theory
2100
x2441
1717E
Madoka and The Best University
math
,
number theory
2200
x2430
980D
Perfect Groups
dp
,
math
,
number theory
2100
x2390
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2358
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2310
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2294
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2287
1033D
Divisors
interactive
,
math
,
number theory
2000
x2284
1646E
Power Board
brute force
,
dp
,
math
,
number theory
2200
x2276
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2244
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2215
1559E
Mocha and Stars
combinatorics
,
dp
,
fft
,
math
,
number theory
2200
x2201
449C
Jzzhu and Apples
constructive algorithms
,
number theory
2500
x2186
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2155
1614D2
Divan and Kostomuksha (hard version)
dp
,
number theory
2300
x2148
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2137
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2093
776E
The Holmes Children
math
,
number theory
2100
x2071
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2071
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2052
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2046
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2031
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2020
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2013
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2007
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2002
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x1993
1500B
Two chandeliers
binary search
,
brute force
,
chinese remainder theorem
,
math
,
number theory
2200
x1976
850B
Arpa and a list of numbers
implementation
,
number theory
2100
x1963
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1961
1603C
Extreme Extension
dp
,
greedy
,
math
,
number theory
2300
x1960
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x1952
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1928
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1895
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x1848
1055C
Lucky Days
math
,
number theory
1900
x1839
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x1810
78C
Beaver Game
dp
,
games
,
number theory
2000
x1790
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1788
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1787
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1786
1510D
Digits
dp
,
math
,
number theory
2100
x1780
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1759
438E
The Child and Binary Tree
combinatorics
,
divide and conquer
,
fft
,
number theory
3100
x1747
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1713
990G
GCD Counting
divide and conquer
,
dp
,
dsu
,
number theory
,
trees
2400
x1684
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1671
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1663
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1663
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1658
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1639
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1630
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1620
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1599
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x1581
1204E
Natasha, Sasha and the Prefix Sums
combinatorics
,
dp
,
math
,
number theory
2300
x1558
1497E2
Square-free division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1541
117B
Very Interesting Game
brute force
,
number theory
1800
x1533
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1501
1406E
Deleting Numbers
interactive
,
math
,
number theory
2600
x1500
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1496
1630D
Flipping Range
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x1494
594D
REQ
data structures
,
number theory
2500
x1487
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1486
1497D
Genius
bitmasks
,
dp
,
graphs
,
number theory
2500
x1473
396A
On Number of Decompositions into Multipliers
combinatorics
,
math
,
number theory
x1457
448E
Divisors
brute force
,
dfs and similar
,
implementation
,
number theory
2200
x1440
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1435
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1432
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1429
1548D1
Gregor and the Odd Cows (Easy)
bitmasks
,
geometry
,
math
,
number theory
2300
x1420
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1405
1036E
Covered Points
fft
,
geometry
,
number theory
2400
x1397
10C
Digital Root
number theory
2000
x1383
463E
Caisa and Tree
brute force
,
dfs and similar
,
math
,
number theory
,
trees
2100
x1376
172D
Calendar Reform
*special problem
,
number theory
1500
x1375
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1353
1036F
Relatively Prime Powers
combinatorics
,
math
,
number theory
2400
x1345
1608D
Dominoes
combinatorics
,
fft
,
graphs
,
math
,
number theory
2400
x1342
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