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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
17:24:52
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→ Filter Problems
Difficulty:
—
implementation
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
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5656
313B
Ilya and Queries
dp
,
implementation
1100
x45044
313A
Ilya and Bank Account
implementation
,
number theory
900
x56871
312A
Whose sentence is it?
implementation
,
strings
1100
x4992
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4037
306A
Candies
implementation
800
x7065
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2457
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2152
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4804
304B
Calendar
brute force
,
implementation
1300
x2987
303B
Rectangle Puzzle II
implementation
,
math
1700
x1347
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7974
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8245
302A
Eugeny and Array
implementation
800
x9107
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x23182
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5356
298B
Sail
brute force
,
greedy
,
implementation
1200
x14275
298A
Snow Footprints
greedy
,
implementation
1300
x10980
295A
Greg and Array
data structures
,
implementation
1400
x18282
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x363
294A
Shaass and Oskols
implementation
,
math
800
x23810
292B
Network Topology
graphs
,
implementation
1200
x8516
292A
SMSC
implementation
1100
x2706
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1682
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x3032
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6104
290D
Orange
*special problem
,
implementation
1400
x1804
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1550
290B
QR code
*special problem
,
implementation
1500
x2446
290A
Mysterious strings
*special problem
,
implementation
1400
x3004
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x17426
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x9304
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x298
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2307
287A
IQ Test
brute force
,
implementation
1100
x19958
286C
Main Sequence
greedy
,
implementation
2100
x1514
286B
Shifting
implementation
2200
x1119
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1555
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x23407
285B
Find Marble
implementation
1200
x15074
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x13388
284B
Cows and Poker Game
brute force
,
implementation
1000
x6865
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6609
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6585
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9442
282A
Bit++
implementation
800
x268176
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3036
281A
Word Capitalization
implementation
,
strings
800
x215586
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x207
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1320
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x4152
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4741
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8290
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x53989
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5620
278A
Circle Line
implementation
800
x11746
277C
Game
games
,
implementation
2400
x453
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13960
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x27206
276A
Lunch Rush
implementation
900
x27815
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2827
275A
Lights Out
implementation
900
x30474
274E
Mirror Room
data structures
,
implementation
3000
x313
272C
Dima and Staircase
data structures
,
implementation
1500
x6805
272B
Dima and Sequence
implementation
,
math
1400
x4035
272A
Dima and Friends
implementation
,
math
1000
x24781
271C
Secret
constructive algorithms
,
implementation
1500
x2999
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4182
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x45803
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13701
268B
Buttons
implementation
,
math
1000
x32663
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x137091
266A
Stones on the Table
implementation
800
x194316
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x17264
265A
Colorful Stones (Simplified Edition)
implementation
800
x37100
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10821
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1078
263B
Squares
greedy
,
implementation
,
sortings
900
x9007
263A
Beautiful Matrix
implementation
800
x248955
262A
Roma and Lucky Numbers
implementation
800
x20063
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2986
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3828
260A
Adding Digits
implementation
,
math
1400
x14867
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x13990
257E
Greedy Elevator
data structures
,
implementation
2200
x294
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x7124
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6498
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x871
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2011
255B
Code Parsing
implementation
1200
x4993
255A
Greg's Workout
implementation
800
x28976
254E
Dormitory
dp
,
implementation
2100
x676
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x552
254B
Jury Size
brute force
,
implementation
1500
x2161
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x530
252A
Little Xor
brute force
,
implementation
1100
x5328
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x171
251B
Playing with Permutations
implementation
,
math
1800
x1276
250B
Restoring IPv6
implementation
,
strings
1500
x1997
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x500
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