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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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Difficulty:
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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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Status
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Custom test
Problems
#
Name
734D
Anton and Chess
implementation
1700
x3743
732D
Exams
binary search
,
greedy
,
sortings
1700
x5562
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3772
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3938
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4403
711C
Coloring Trees
dp
1700
x8274
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5752
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3511
691D
Swaps in Permutation
dfs and similar
,
dsu
,
math
1700
x5558
690B1
Recover Polygon (easy)
1700
x941
689C
Mike and Chocolate Thieves
binary search
,
combinatorics
,
math
1700
x5391
685A
Robbers' watch
brute force
,
combinatorics
,
dp
,
math
1700
x4239
678D
Iterated Linear Function
math
,
number theory
1700
x4567
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3241
656B
Scrambled
*special problem
,
implementation
1700
x1655
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2705
632C
The Smallest String Concatenation
sortings
,
strings
1700
x7970
631C
Report
data structures
,
sortings
1700
x3800
630Q
Pyramids
geometry
,
math
1700
x1284
630I
Parking Lot
combinatorics
,
math
1700
x6858
627B
Factory Repairs
data structures
1700
x2935
627A
XOR Equation
dp
,
math
1700
x4247
625A
Guest From the Past
implementation
,
math
1700
x5424
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6729
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5569
617D
Polyline
constructive algorithms
,
implementation
1700
x4225
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3471
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x11232
596C
Wilbur and Points
combinatorics
,
greedy
,
sortings
1700
x2258
590A
Median Smoothing
implementation
1700
x3981
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3580
584C
Marina and Vasya
constructive algorithms
,
greedy
,
strings
1700
x6254
582A
GCD Table
constructive algorithms
,
greedy
,
number theory
1700
x7819
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3771
578B
"Or" Game
brute force
,
greedy
1700
x5232
578A
A Problem about Polyline
geometry
,
math
1700
x4773
575D
Tablecity
constructive algorithms
,
implementation
1700
x1878
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4819
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9599
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10696
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11972
540B
School Marks
greedy
,
implementation
1700
x4711
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2199
530E
Sum and product
*special problem
1700
x308
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1464
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x7051
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4348
498A
Crazy Town
geometry
1700
x6475
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9714
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9104
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6707
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11772
484A
Bits
bitmasks
,
constructive algorithms
1700
x11472
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4795
474D
Flowers
dp
1700
x25541
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3570
467C
George and Job
dp
,
implementation
1700
x14776
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x36510
464A
No to Palindromes!
greedy
,
strings
1700
x5920
460C
Present
binary search
,
data structures
,
greedy
1700
x6248
457A
Golden System
math
,
meet-in-the-middle
1700
x1284
451C
Predict Outcome of the Game
brute force
,
implementation
,
math
1700
x3388
449A
Jzzhu and Chocolate
greedy
,
math
1700
x3951
442A
Borya and Hanabi
bitmasks
,
brute force
,
implementation
1700
x2153
439D
Devu and his Brother
binary search
,
sortings
,
ternary search
,
two pointers
1700
x6131
439C
Devu and Partitioning of the Array
brute force
,
constructive algorithms
,
implementation
,
number theory
1700
x3934
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x14147
411C
Kicker
implementation
1700
x1229
409D
Big Data
*special problem
1700
x1716
409C
Magnum Opus
*special problem
1700
x1983
409B
Mysterious Language
*special problem
1700
x1359
409A
The Great Game
*special problem
1700
x2469
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3125
387C
George and Number
greedy
,
implementation
1700
x2188
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9710
382C
Arithmetic Progression
implementation
,
sortings
1700
x8321
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2057
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x14021
339D
Xenia and Bit Operations
data structures
,
trees
1700
x26055
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8332
331B1
Shave Beaver!
implementation
1700
x738
327C
Magic Five
combinatorics
,
math
1700
x3225
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3650
316G1
Good Substrings
hashing
,
strings
1700
x966
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2151
303B
Rectangle Puzzle II
implementation
,
math
1700
x1347
297A
Parity Game
constructive algorithms
1700
x3628
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x14310
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4570
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1550
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2307
287B
Pipeline
binary search
,
math
1700
x9884
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3671
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3036
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8288
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13949
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2827
269B
Greenhouse Effect
dp
1700
x6344
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2986
245C
Game with Coins
greedy
1700
x1551
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