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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
36:23:10
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→ Filter Problems
Difficulty:
—
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
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1736
294C
Shaass and Lights
combinatorics
,
number theory
1900
x3837
292E
Copying Data
data structures
1900
x4178
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2449
292C
Beautiful IP Addresses
brute force
2000
x1172
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1319
286C
Main Sequence
greedy
,
implementation
2100
x1514
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1555
283C
Coin Troubles
dp
2100
x1449
282D
Yet Another Number Game
dp
,
games
2100
x1447
280A
Rectangle Puzzle
geometry
2000
x1473
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1449
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1617
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1687
268E
Playlist
math
,
probabilities
,
sortings
2100
x1026
267B
Dominoes
dfs and similar
,
graphs
2000
x644
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1354
264C
Choosing Balls
dp
2000
x2956
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1078
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x779
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1418
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1556
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1795
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1453
257D
Sum
greedy
,
math
1900
x1610
254E
Dormitory
dp
,
implementation
2100
x676
253D
Table with Letters - 2
brute force
,
two pointers
2000
x847
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1036
250E
Mad Joe
brute force
2000
x467
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x894
248C
Robo-Footballer
binary search
,
geometry
2000
x855
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x878
243B
Hydra
graphs
,
sortings
2000
x1236
242E
XOR on Segment
bitmasks
,
data structures
2000
x9401
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1881
241G
Challenging Balloons
constructive algorithms
1900
x548
241C
Mirror Box
geometry
,
implementation
2000
x512
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1247
237E
Build String
flows
,
graphs
2000
x1738
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x567
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3588
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x568
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1479
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1907
229D
Towers
dp
,
greedy
,
two pointers
2100
x2275
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1630
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2479
228D
Zigzag
data structures
2100
x386
228C
Fractal Detector
dp
,
hashing
2000
x455
226D
The table
constructive algorithms
,
greedy
2100
x967
226B
Naughty Stone Piles
greedy
1900
x1566
225E
Unsolvable
math
,
number theory
2100
x806
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1568
223B
Two Strings
data structures
,
dp
,
strings
1900
x1813
222E
Decoding Genome
dp
,
matrices
1900
x2829
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2173
220C
Little Elephant and Shifts
data structures
2100
x945
217B
Blackboard Fibonacci
brute force
,
math
2100
x899
216E
Martian Luck
math
,
number theory
2000
x590
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x557
215D
Hot Days
greedy
1900
x1604
215C
Crosses
brute force
,
implementation
2100
x670
213C
Relay Race
dp
2000
x2891
213B
Numbers
combinatorics
,
dp
1900
x1784
212C
Cowboys
combinatorics
,
dp
,
math
2100
x389
209B
Pixels
constructive algorithms
,
math
2100
x377
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6921
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1873
208B
Solitaire
dfs and similar
,
dp
1900
x1364
207D6
The Beaver's Problem - 3
2100
x84
207D4
The Beaver's Problem - 3
2100
x154
207D3
The Beaver's Problem - 3
2000
x136
207D2
The Beaver's Problem - 3
2000
x110
207D10
The Beaver's Problem - 3
2100
x82
207C1
Game with Two Trees
2100
x107
207B2
Military Trainings
1900
x196
207A3
Beaver's Calculator 1.0
greedy
2000
x217
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1119
201C
Fragile Bridges
dp
2000
x1367
199B
Special Olympics
geometry
1900
x805
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2224
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x724
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x1046
193B
Xor
brute force
2000
x1013
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x7303
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1552
190D
Non-Secret Cypher
two pointers
1900
x2342
187C
Weak Memory
dfs and similar
,
dsu
2000
x1362
182C
Optimal Sum
data structures
,
greedy
2000
x742
180D
Name
greedy
,
strings
1900
x732
178E2
The Beaver's Problem - 2
2000
x230
178E1
The Beaver's Problem - 2
1900
x289
178D3
Magic Squares
2100
x250
178D2
Magic Squares
1900
x273
178C3
Smart Beaver and Resolving Collisions
2000
x324
178C2
Smart Beaver and Resolving Collisions
1900
x307
177E2
Space Voyage
binary search
1900
x433
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x482
173C
Spiral Maximum
brute force
,
dp
1900
x989
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1466
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