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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
44:47:31
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Difficulty:
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constructive algorithms
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
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x10472
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x10950
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11219
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11309
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x11612
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x12608
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x12669
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x12752
1503A
Balance the Bits
constructive algorithms
,
greedy
1600
x12920
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x12960
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x12996
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14137
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x14842
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x15970
1497C2
k-LCM (hard version)
constructive algorithms
,
math
1600
x16268
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x17208
1352G
Special Permutation
constructive algorithms
1600
x19524
649C
Печать условий
constructive algorithms
,
greedy
,
sortings
1500
x435
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1891
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2194
271C
Secret
constructive algorithms
,
implementation
1500
x2893
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3542
1054C
Candies Distribution
constructive algorithms
,
implementation
1500
x4214
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4368
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4503
329A
Purification
constructive algorithms
,
greedy
1500
x4578
710C
Magic Odd Square
constructive algorithms
,
math
1500
x4954
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x4960
901A
Hashing Trees
constructive algorithms
,
trees
1500
x4992
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5496
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5496
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5581
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5641
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5659
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5777
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6543
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6612
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x6674
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6682
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6759
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7061
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7115
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7195
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x7470
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7536
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x7593
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7725
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8533
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8597
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8682
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8829
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8875
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9045
1439A1
Binary Table (Easy Version)
constructive algorithms
,
implementation
1500
x9119
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9273
1611D
Weights Assignment For Tree Edges
constructive algorithms
,
trees
1500
x9405
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9597
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x9644
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9839
1814C
Search in Parallel
constructive algorithms
,
greedy
,
sortings
1500
x9971
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10068
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10515
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x10566
1215C
Swap Letters
constructive algorithms
,
greedy
1500
x10748
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x10786
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10797
1873G
ABBC or BACB
constructive algorithms
,
greedy
1500
x11303
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x11387
1809C
Sum on Subarrays
constructive algorithms
,
greedy
,
math
1500
x11694
743C
Vladik and fractions
brute force
,
constructive algorithms
,
math
,
number theory
1500
x11729
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11810
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11814
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12213
1473C
No More Inversions
constructive algorithms
,
math
1500
x12293
1506E
Restoring the Permutation
constructive algorithms
,
implementation
1500
x12497
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12678
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12761
1562C
Rings
constructive algorithms
,
math
1500
x12828
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x12909
1368C
Even Picture
constructive algorithms
1500
x12954
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13198
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13598
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x13954
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14521
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15340
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16032
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16636
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17269
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17512
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x18865
1542B
Plus and Multiply
constructive algorithms
,
math
,
number theory
1500
x21757
649B
Этажи
constructive algorithms
1400
x516
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2406
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2493
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3088
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3872
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x3987
865A
Save the problem!
constructive algorithms
1400
x4131
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4530
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4596
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