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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
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constructive algorithms
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
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
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Status
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Custom test
Problems
#
Name
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x20076
398C
Tree and Array
constructive algorithms
x214
398A
Cards
constructive algorithms
,
implementation
x927
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x754
394C
Dominoes
constructive algorithms
,
greedy
x520
390D
Inna and Sweet Matrix
constructive algorithms
x518
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2482
379B
New Year Present
constructive algorithms
,
implementation
1200
x7278
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x635
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1584
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6525
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x8090
361A
Levko and Table
constructive algorithms
,
implementation
800
x16773
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x469
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x8071
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8573
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x2032
357B
Flag Day
constructive algorithms
,
implementation
1400
x8205
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x972
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1272
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9459
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x878
353D
Queue
constructive algorithms
,
dp
2000
x2925
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2291
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x779
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x9009
341E
Candies Game
constructive algorithms
,
greedy
3000
x457
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x552
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8333
335B
Palindrome
constructive algorithms
,
dp
1900
x2110
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2586
333C
Lucky Tickets
brute force
,
constructive algorithms
2700
x392
331E2
Deja Vu
constructive algorithms
,
dp
3100
x218
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x165
330B
Road Construction
constructive algorithms
,
graphs
1300
x17217
329D
The Evil Temple and the Moving Rocks
constructive algorithms
2500
x407
329C
Graph Reconstruction
constructive algorithms
2400
x912
329A
Purification
constructive algorithms
,
greedy
1500
x4651
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1411
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2285
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x401
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x747
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x7415
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x155
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x507
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x182
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x554
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5656
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4037
306D
Polygon
constructive algorithms
,
geometry
2300
x284
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4804
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7974
301C
Yaroslav and Algorithm
constructive algorithms
2500
x475
301A
Yaroslav and Sequence
constructive algorithms
1800
x3088
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x23179
297D
Color the Carpet
constructive algorithms
2500
x589
297C
Splitting the Uniqueness
constructive algorithms
2400
x962
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3507
297A
Parity Game
constructive algorithms
1700
x3628
290E
HQ
*special problem
,
constructive algorithms
2500
x205
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x833
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3186
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6585
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9441
277B
Set of Points
constructive algorithms
,
geometry
2300
x812
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2827
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1230
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x505
271C
Secret
constructive algorithms
,
implementation
1500
x2999
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1687
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13700
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1354
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x137024
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10820
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x779
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1556
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2986
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x7107
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2636
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9308
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2323
241G
Challenging Balloons
constructive algorithms
1900
x548
238B
Boring Partition
constructive algorithms
1800
x1333
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2047
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x568
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1480
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x291
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2549
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3624
226D
The table
constructive algorithms
,
greedy
2100
x967
225A
Dice Tower
constructive algorithms
,
greedy
1100
x11783
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x10410
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x9513
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4984
213D
Stars
constructive algorithms
,
geometry
2300
x341
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x754
209B
Pixels
constructive algorithms
,
math
2100
x377
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x3015
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x26747
198D
Cube Snake
constructive algorithms
2700
x107
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