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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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Difficulty:
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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
6A
Triangle
brute force
,
geometry
900
x20013
5E
Bindian Signalizing
data structures
2400
x2163
5D
Follow Traffic Rules
implementation
,
math
2100
x1727
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x14066
5B
Center Alignment
implementation
,
strings
1200
x5958
5A
Chat Servers Outgoing Traffic
implementation
1000
x9774
4D
Mysterious Present
dp
,
sortings
1700
x10401
4C
Registration System
data structures
,
hashing
,
implementation
1300
x84663
4B
Before an Exam
constructive algorithms
,
greedy
1200
x25196
4A
Watermelon
brute force
,
math
800
x535643
3D
Least Cost Bracket Sequence
greedy
2600
x3418
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7393
3B
Lorry
greedy
,
sortings
1900
x4612
3A
Shortest path of the king
greedy
,
shortest paths
1000
x19392
2C
Commentator problem
geometry
2600
x1771
2B
The least round way
dp
,
math
2000
x11004
2A
Winner
hashing
,
implementation
1500
x26648
1C
Ancient Berland Circus
geometry
,
math
2100
x5740
1B
Spreadsheet
implementation
,
math
1600
x22918
1A
Theatre Square
math
1000
x265493
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