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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
3 days
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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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Problems
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Name
1195D2
Submarine in the Rybinsk Sea (hard edition)
combinatorics
,
math
,
number theory
1800
x4674
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7904
1195C
Basketball Exercise
dp
1400
x26512
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19968
1195A
Drinks Choosing
greedy
,
math
1000
x13165
1194G
Another Meme Problem
dp
2700
x261
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x996
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1936
1194D
1-2-K Game
games
,
math
1700
x6592
1194C
From S To T
implementation
,
strings
1300
x13277
1194B
Yet Another Crosses Problem
implementation
1300
x10329
1194A
Remove a Progression
math
800
x16371
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x40
1193B
Magic Tree
*special problem
,
data structures
,
dp
,
trees
x441
1193A
Amusement Park
*special problem
,
dp
,
math
x278
1192C
Cubeword
*special problem
,
brute force
,
dp
,
meet-in-the-middle
x334
1192B
Dynamic Diameter
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
trees
x1231
1192A
Building Skyscrapers
*special problem
x62
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9618
1191A
Tokitsukaze and Enhancement
brute force
800
x18202
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x93
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x227
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2311
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x2031
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6470
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9393
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10624
1189B
Number Circle
greedy
,
math
,
sortings
1100
x14335
1189A
Keanu Reeves
strings
800
x15325
1188E
Problem from Red Panda
combinatorics
3300
x243
1188D
Make Equal
dp
3100
x721
1188C
Array Beauty
dp
2500
x1793
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4582
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1246
1188A1
Add on a Tree
trees
1600
x8446
1187G
Gang Up
flows
,
graphs
2500
x576
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x887
1187E
Tree Painting
dfs and similar
,
dp
,
trees
2100
x8516
1187D
Subarray Sorting
data structures
,
sortings
2400
x2652
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x6382
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x12303
1187A
Stickers and Toys
math
900
x14911
1186F
Vus the Cossack and a Graph
dfs and similar
,
graphs
,
greedy
,
implementation
2400
x788
1186E
Vus the Cossack and a Field
divide and conquer
,
implementation
,
math
2500
x630
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8964
1186C
Vus the Cossack and Strings
implementation
,
math
1800
x6141
1186A
Vus the Cossack and a Contest
implementation
800
x37861
1185G2
Playlist for Polycarp (hard version)
combinatorics
,
dp
2600
x768
1185G1
Playlist for Polycarp (easy version)
bitmasks
,
combinatorics
,
dp
2100
x2888
1185F
Two Pizzas
bitmasks
,
brute force
2100
x2053
1185E
Polycarp and Snakes
brute force
,
implementation
2000
x2668
1185D
Extra Element
implementation
,
math
1700
x6747
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7481
1185C1
Exam in BerSU (easy version)
greedy
,
sortings
1200
x11435
1185B
Email from Polycarp
implementation
,
strings
1200
x13439
1185A
Ropewalkers
math
800
x14931
1184E3
Daleks' Invasion (hard)
data structures
,
dsu
,
graphs
,
trees
2400
x579
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x952
1184E1
Daleks' Invasion (easy)
graphs
,
trees
1900
x1627
1184D2
Parallel Universes (Hard)
math
,
matrices
3100
x107
1184D1
Parallel Universes (Easy)
implementation
1600
x2548
1184C3
Heidi and the Turing Test (Hard)
3200
x41
1184C2
Heidi and the Turing Test (Medium)
data structures
2200
x633
1184C1
Heidi and the Turing Test (Easy)
implementation
1600
x2302
1184B3
The Doctor Meets Vader (Hard)
flows
,
shortest paths
2700
x174
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x593
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x5435
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x139
1184A2
Heidi Learns Hashing (Medium)
brute force
,
number theory
2100
x1001
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5992
1183H
Subsequences (hard version)
dp
,
strings
1900
x3202
1183G
Candy Box (hard version)
greedy
,
implementation
,
sortings
2000
x2384
1183F
Topforces Strikes Back
brute force
,
math
,
sortings
2100
x2033
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4889
1183D
Candy Box (easy version)
greedy
,
sortings
1400
x14604
1183C
Computer Game
binary search
,
math
1400
x14060
1183B
Equalize Prices
math
900
x18566
1183A
Nearest Interesting Number
implementation
800
x25005
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x345
1182E
Product Oriented Recurrence
dp
,
math
,
matrices
,
number theory
2300
x2858
1182D
Complete Mirror
constructive algorithms
,
dfs and similar
,
dp
,
hashing
,
implementation
,
trees
2400
x861
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4427
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x11179
1182A
Filling Shapes
dp
,
math
1000
x31431
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x289
1181E1
A Story of One Country (Easy)
brute force
,
divide and conquer
,
sortings
2500
x482
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2419
1181C
Flag
brute force
,
combinatorics
,
dp
,
implementation
1900
x3155
1181B
Split a Number
greedy
,
implementation
,
strings
1500
x6326
1181A
Chunga-Changa
greedy
,
math
1000
x13697
1180B
Nick and Array
greedy
,
implementation
1500
x9596
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x25412
1179E
Alesya and Discrete Math
divide and conquer
,
interactive
3200
x176
1179D
Fedor Runs for President
data structures
,
dp
,
trees
2700
x844
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x2085
1179B
Tolik and His Uncle
constructive algorithms
1800
x4393
1179A
Valeriy and Deque
data structures
,
implementation
1500
x10657
1178H
Stock Exchange
binary search
,
flows
,
graphs
3500
x232
1178G
The Awesomest Vertex
data structures
,
dfs and similar
3000
x472
1178F2
Long Colorful Strip
dp
2600
x908
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