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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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Difficulty:
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greedy
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
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19351
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x907
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7812
515D
Drazil and Tiles
constructive algorithms
,
greedy
2000
x2764
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x25029
514A
Chewbaсca and Number
greedy
,
implementation
1200
x46170
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x2009
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9531
508E
Arthur and Brackets
dp
,
greedy
2200
x1535
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4414
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22114
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x17235
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x1326
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5513
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5748
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8717
499A
Watching a movie
greedy
,
implementation
1000
x13737
496E
Distributing Parts
greedy
,
sortings
2100
x1629
494A
Treasure
greedy
1500
x6118
492C
Vanya and Exams
greedy
,
sortings
1400
x13718
491B
New York Hotel
greedy
,
math
2100
x537
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1552
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55810
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44655
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46759
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9838
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2074
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11516
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x16978
485B
Valuable Resources
brute force
,
greedy
1300
x6451
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2420
482A
Diverse Permutation
constructive algorithms
,
greedy
1200
x9519
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4706
479C
Exams
greedy
,
sortings
1400
x28612
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7553
478C
Table Decorations
greedy
1800
x17522
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35384
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4325
475C
Kamal-ol-molk's Painting
brute force
,
constructive algorithms
,
greedy
2100
x777
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6314
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3538
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91834
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x3956
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7889
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x767
464A
No to Palindromes!
greedy
,
strings
1700
x5826
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8384
462B
Appleman and Card Game
greedy
1300
x14041
461A
Appleman and Toastman
greedy
,
sortings
1200
x15214
460C
Present
binary search
,
data structures
,
greedy
1700
x6053
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
457B
Distributed Join
greedy
1900
x1126
452D
Washer, Dryer, Folder
greedy
,
implementation
1900
x1474
449B
Jzzhu and Cities
graphs
,
greedy
,
shortest paths
2000
x8058
449A
Jzzhu and Chocolate
greedy
,
math
1700
x3866
448C
Painting Fence
divide and conquer
,
dp
,
greedy
1900
x7835
447B
DZY Loves Strings
greedy
,
implementation
1000
x19988
446B
DZY Loves Modification
brute force
,
data structures
,
greedy
2000
x3515
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12140
444A
DZY Loves Physics
greedy
,
math
1600
x3370
442C
Artem and Array
data structures
,
greedy
2500
x1622
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4855
441B
Valera and Fruits
greedy
,
implementation
1400
x6948
440B
Balancer
greedy
,
implementation
1600
x1917
439A
Devu, the Singer and Churu, the Joker
greedy
,
implementation
900
x24905
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13532
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9190
436E
Cardboard Box
data structures
,
greedy
2600
x1259
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2581
436A
Feed with Candy
greedy
1500
x3399
435D
Special Grid
brute force
,
dp
,
greedy
2000
x746
435B
Pasha Maximizes
greedy
1400
x6766
432E
Square Tiling
constructive algorithms
,
greedy
2300
x662
432C
Prime Swaps
greedy
,
sortings
1800
x2439
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11484
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56872
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x901
427E
Police Patrol
greedy
,
implementation
,
math
,
ternary search
2000
x1396
425B
Sereja and Table
bitmasks
,
greedy
2200
x1282
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7354
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2375
416D
Population Size
greedy
,
implementation
,
math
2400
x904
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7654
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8674
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6125
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x674
413C
Jeopardy!
greedy
,
math
1400
x2305
412B
Network Configuration
greedy
,
sortings
900
x5282
412A
Poster
greedy
,
implementation
900
x4313
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3089
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94944
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x562
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2520
402A
Nuts
greedy
,
math
1100
x4517
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19302
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4385
394C
Dominoes
constructive algorithms
,
greedy
x511
391F2
Stock Trading
greedy
x104
391C2
The Tournament
greedy
x131
389B
Fox and Cross
greedy
,
implementation
1100
x6824
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