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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
22:25:55
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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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Custom test
Problems
#
Name
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x487
152D
Frames
brute force
2600
x244
152C
Pocket Book
combinatorics
1400
x10673
152B
Steps
binary search
,
implementation
1300
x6753
152A
Marks
implementation
900
x16880
151B
Phone Numbers
implementation
,
strings
1200
x6390
151A
Soft Drinking
implementation
,
math
800
x74705
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x868
150D
Mission Impassable
dp
,
strings
2600
x627
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x643
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4214
150A
Win or Freeze
games
,
math
,
number theory
1400
x7867
149E
Martian Strings
string suffix structures
,
strings
2300
x2293
149D
Coloring Brackets
dp
1900
x3914
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5404
149B
Martian Clock
implementation
1600
x2264
149A
Business trip
greedy
,
implementation
,
sortings
900
x40137
148E
Porcelain
dp
1900
x4088
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x7344
148C
Terse princess
constructive algorithms
,
greedy
1700
x3147
148B
Escape
implementation
,
math
1500
x5513
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x93938
147B
Smile House
binary search
,
graphs
,
matrices
2500
x789
147A
Punctuation
implementation
,
strings
1300
x3658
146B
Lucky Mask
brute force
,
implementation
1300
x4410
146A
Lucky Ticket
implementation
800
x15177
145E
Lucky Queries
data structures
2400
x3200
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x243
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1911
145B
Lucky Number 2
constructive algorithms
1800
x2221
145A
Lucky Conversion
greedy
,
implementation
1200
x7174
144E
Competition
data structures
,
greedy
2200
x590
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4026
144C
Anagram Search
implementation
,
strings
1500
x4017
144B
Meeting
implementation
1300
x5287
144A
Arrival of the General
implementation
800
x97445
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4996
143A
Help Vasilisa the Wise 2
brute force
,
math
1000
x13948
142E
Help Greg the Dwarf 2
geometry
3000
x80
142D
Help Shrek and Donkey 2
games
2600
x347
142C
Help Caretaker
brute force
,
dp
2300
x930
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2219
142A
Help Farmer
brute force
,
math
1600
x2630
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x1100
141D
Take-off Ramps
graphs
,
shortest paths
2300
x900
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2470
141B
Hopscotch
geometry
,
math
1400
x5407
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x84306
140F
New Year Snowflake
geometry
,
sortings
2600
x370
140E
New Year Garland
combinatorics
,
dp
2600
x948
140D
New Year Contest
greedy
,
sortings
1800
x2217
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4386
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1683
140A
New Year Table
geometry
,
math
1700
x4157
139B
Wallpaper
implementation
,
math
1600
x1311
139A
Petr and Book
implementation
1000
x31561
138E
Hellish Constraints
brute force
,
dp
,
two pointers
2900
x174
138D
World of Darkraft
dp
,
games
2500
x497
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x871
138B
Digits Permutations
greedy
1900
x1039
138A
Literature Lesson
implementation
1600
x2395
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1242
137D
Palindromes
dp
,
strings
1900
x1523
137C
History
sortings
1500
x7231
137B
Permutation
greedy
1000
x13759
137A
Postcards and photos
implementation
900
x7218
136B
Ternary Logic
implementation
,
math
1100
x4881
136A
Presents
implementation
800
x119536
135E
Weak Subsequence
combinatorics
3000
x306
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x301
135C
Zero-One
constructive algorithms
,
games
,
greedy
1900
x1349
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2361
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7647
134C
Swaps
constructive algorithms
,
graphs
,
greedy
2200
x475
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x2051
134A
Average Numbers
brute force
,
implementation
1200
x4002
133B
Unary
implementation
1200
x8826
133A
HQ9+
implementation
900
x106640
132E
Bits of merry old England
flows
,
graphs
2700
x533
132D
Constants in the language of Shakespeare
constructive algorithms
,
dp
,
greedy
2100
x618
132C
Logo Turtle
dp
1800
x2353
132B
Piet
implementation
2100
x663
132A
Turing Tape
implementation
1300
x2785
131F
Present to Mom
binary search
,
two pointers
2000
x649
131E
Yet Another Task with Queens
sortings
1700
x1856
131D
Subway
dfs and similar
,
graphs
1600
x4701
131C
The World is a Theatre
combinatorics
,
math
1400
x11229
131B
Opposites Attract
implementation
,
math
1200
x7056
131A
cAPS lOCK
implementation
,
strings
1000
x86539
130J
Date calculation
*special problem
1800
x341
130I
Array sorting
*special problem
,
sortings
2300
x167
130H
Balanced brackets
*special problem
1600
x606
130G
CAPS LOCK ON
*special problem
1700
x284
130F
Prime factorization
*special problem
1600
x278
130E
Tribonacci numbers
*special problem
1600
x296
130D
Exponentiation
*special problem
1500
x394
130C
Decimal sum
*special problem
1500
x502
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x532
130A
Hexagonal numbers
*special problem
,
implementation
900
x1633
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x12363
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