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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
2 days
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binary search
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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Custom test
Problems
#
Name
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5960
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x683
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x7333
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4820
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9603
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x874
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x1004
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2120
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1875
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3598
549H
Degenerate Matrix
binary search
,
math
2100
x1994
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8830
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2137
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5828
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3800
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2419
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x392
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6934
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x3319
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x2058
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6951
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x374
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4486
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x6958
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x1409
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x940
501E
Misha and Palindrome Degree
binary search
,
combinatorics
,
implementation
2500
x918
496D
Tennis Game
binary search
1900
x3025
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6838
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3159
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x76596
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1604
489E
Hiking
binary search
,
dp
2300
x1033
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3557
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3774
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2346
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x7078
483B
Friends and Presents
binary search
,
math
1800
x4094
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4795
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3402
474B
Worms
binary search
,
implementation
1200
x49186
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3571
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2423
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x36529
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x449
460C
Present
binary search
,
data structures
,
greedy
1700
x6249
448D
Multiplication Table
binary search
,
brute force
1800
x14240
444E
DZY Loves Planting
binary search
,
dsu
,
trees
2700
x779
444D
DZY Loves Strings
binary search
,
hashing
,
strings
,
two pointers
2500
x783
439D
Devu and his Brother
binary search
,
sortings
,
ternary search
,
two pointers
1700
x6135
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x273
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x1025
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2323
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1461
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x568
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7769
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x541
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8056
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6322
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x687
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x578
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x972
387E
George and Cards
binary search
,
data structures
2200
x890
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2187
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9712
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x697
382B
Number Busters
binary search
,
math
2000
x1412
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2688
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2113
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x186
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x885
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2487
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x991
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x13164
371C
Hamburgers
binary search
,
brute force
1600
x26810
369E
Valera and Queries
binary search
,
data structures
2200
x2180
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2477
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1567
363D
Renting Bikes
binary search
,
greedy
1800
x3965
360B
Levko and Array
binary search
,
dp
2000
x3026
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x5138
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x269
348A
Mafia
binary search
,
math
,
sortings
1600
x13228
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x3024
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x7254
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4905
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2586
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1137
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x2122
325B
Stadium and Games
binary search
,
math
1800
x1568
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3650
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x527
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1519
309E
Sheep
binary search
,
greedy
2900
x225
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1366
309A
Morning run
binary search
,
math
,
two pointers
2000
x488
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8242
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2409
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1047
287B
Pipeline
binary search
,
math
1700
x9886
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