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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
22:56:40
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Difficulty:
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math
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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Status
Standings
Custom test
Problems
#
Name
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9442
282B
Painting Eggs
greedy
,
math
1500
x13025
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x207
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x4152
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13957
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2629
272B
Dima and Sequence
implementation
,
math
1400
x4035
272A
Dima and Friends
implementation
,
math
1000
x24780
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x505
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x13216
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x45802
269E
String Theory
geometry
,
math
,
strings
3100
x109
269A
Magical Boxes
greedy
,
math
1600
x3535
268E
Playlist
math
,
probabilities
,
sortings
2100
x1026
268B
Buttons
implementation
,
math
1000
x32662
267C
Berland Traffic
math
,
matrices
2700
x164
267A
Subtractions
math
,
number theory
900
x7578
266E
More Queries to Array...
data structures
,
math
2500
x930
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x899
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1354
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x779
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1418
260A
Adding Digits
implementation
,
math
1400
x14866
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1287
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1795
258A
Little Elephant and Bits
greedy
,
math
1100
x23102
257D
Sum
greedy
,
math
1900
x1610
257C
View Angle
brute force
,
geometry
,
math
1800
x4389
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x871
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2011
251D
Two Sets
bitmasks
,
math
2700
x479
251B
Playing with Permutations
implementation
,
math
1800
x1276
249E
Endless Matrix
math
2600
x320
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x462
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x584
248B
Chilly Willy
math
,
number theory
1400
x5346
246B
Increase and Decrease
greedy
,
math
1300
x11358
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x818
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x19028
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2047
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x779
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3589
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7541
233A
Perfect Permutation
implementation
,
math
800
x42987
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1479
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x76683
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x466
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1630
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x914
226A
Flying Saucer Segments
math
1400
x4011
225E
Unsolvable
math
,
number theory
2100
x806
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x26975
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1568
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2264
221A
Little Elephant and Function
implementation
,
math
1000
x15307
220D
Little Elephant and Triangle
geometry
,
math
2500
x286
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x251
217B
Blackboard Fibonacci
brute force
,
math
2100
x899
216E
Martian Luck
math
,
number theory
2000
x590
216A
Tiling with Hexagons
implementation
,
math
1200
x5024
215B
Olympic Medal
greedy
,
math
1300
x5602
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4984
212C
Cowboys
combinatorics
,
dp
,
math
2100
x389
209B
Pixels
constructive algorithms
,
math
2100
x377
209A
Multicolored Marbles
dp
,
math
1600
x2373
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1119
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1418
201B
Guess That Car!
math
,
ternary search
1800
x1293
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x3015
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x344
200B
Drinks
implementation
,
math
800
x118331
198A
About Bacteria
implementation
,
math
1700
x3157
197B
Limit
math
1400
x4644
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6359
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x1046
195B
After Training
data structures
,
implementation
,
math
1300
x5210
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x9088
194B
Square
math
1200
x3544
194A
Exams
implementation
,
math
900
x9915
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x343
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x517
190A
Vasya and the Bus
greedy
,
math
1100
x5896
189B
Counting Rhombi
brute force
,
math
1300
x3954
188C
LCM
*special problem
,
implementation
,
math
1400
x454
185D
Visit of the Great
math
,
number theory
2600
x443
185B
Mushroom Scientists
math
,
ternary search
1800
x1642
185A
Plant
math
1300
x5949
183A
Headquarters
constructive algorithms
,
math
1700
x550
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8102
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2531
180B
Divisibility Rules
math
,
number theory
2300
x349
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x297
174A
Problem About Equation
math
1100
x2904
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2301
168A
Wizards and Demonstration
implementation
,
math
900
x10638
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x580
167C
Wizards and Numbers
games
,
math
2300
x674
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2169
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2044
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21326
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