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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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→ Filter Problems
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
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x38060
1352A
Sum of Round Numbers
implementation
,
math
800
x81174
1351C
Skier
data structures
,
implementation
1400
x8622
1351B
Square?
brute force
,
implementation
,
math
900
x17117
1351A
A+B (Trial Problem)
implementation
800
x24227
1350B
Orac and Models
dp
,
math
,
number theory
1400
x22527
1350A
Orac and Factors
math
900
x26144
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x114
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x418
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x92
1349D
Slime and Biscuits
math
,
probabilities
3200
x916
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4544
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8198
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17313
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x821
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2248
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8911
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14679
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25518
1348A
Phoenix and Balance
greedy
,
math
800
x39780
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x49
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x50
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x135
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x228
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x380
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x506
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x608
1346B
Boot Camp
*special problem
,
greedy
1400
x1210
1346A
Color Revolution
*special problem
,
math
1000
x2043
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x26590
1345A
Puzzle Pieces
math
800
x24243
1344F
Piet's Palette
matrices
3200
x455
1344E
Train Tracks
data structures
,
trees
3100
x461
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1170
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1867
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6076
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15699
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1272
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x5224
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12762
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x38716
1343B
Balanced Array
constructive algorithms
,
math
800
x57107
1343A
Candies
brute force
,
math
900
x48356
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x766
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x3113
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6125
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14088
1342B
Binary Period
constructive algorithms
,
strings
1100
x23748
1342A
Road To Zero
greedy
,
math
1000
x40925
1341B
Nastya and Door
greedy
,
implementation
1300
x19746
1341A
Nastya and Rice
math
900
x29121
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x508
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x53
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x995
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2261
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7873
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13431
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x26569
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x32205
1338E
JYPnation
graphs
3500
x245
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1025
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3235
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8514
1338A
Powered Addition
greedy
,
math
1500
x24321
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34429
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38627
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x221
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x307
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x691
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x477
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3623
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11417
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20605
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x2197
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8389
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10897
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x27544
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34941
1335B
Construct the String
constructive algorithms
900
x38729
1335A
Candies and Two Sisters
math
800
x86123
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x374
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1323
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2851
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7344
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16729
1334B
Middle Class
greedy
,
sortings
1100
x25961
1334A
Level Statistics
implementation
,
math
1200
x23360
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4284
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1705
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3949
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12641
1333B
Kind Anton
greedy
,
implementation
1100
x21650
1333A
Little Artem
constructive algorithms
1000
x24669
1332G
No Monotone Triples
data structures
3100
x301
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x1018
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3875
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8199
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16813
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17675
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19438
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