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Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
38:40:59
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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
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Custom test
Problems
#
Name
6A
Triangle
brute force
,
geometry
900
x20032
5E
Bindian Signalizing
data structures
2400
x2164
5D
Follow Traffic Rules
implementation
,
math
2100
x1727
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x14097
5B
Center Alignment
implementation
,
strings
1200
x5960
5A
Chat Servers Outgoing Traffic
implementation
1000
x9779
4D
Mysterious Present
dp
,
sortings
1700
x10411
4C
Registration System
data structures
,
hashing
,
implementation
1300
x84754
4B
Before an Exam
constructive algorithms
,
greedy
1200
x25222
4A
Watermelon
brute force
,
math
800
x536696
3D
Least Cost Bracket Sequence
greedy
2600
x3421
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7394
3B
Lorry
greedy
,
sortings
1900
x4615
3A
Shortest path of the king
greedy
,
shortest paths
1000
x19401
2C
Commentator problem
geometry
2600
x1773
2B
The least round way
dp
,
math
2000
x11011
2A
Winner
hashing
,
implementation
1500
x26666
1C
Ancient Berland Circus
geometry
,
math
2100
x5742
1B
Spreadsheet
implementation
,
math
1600
x22936
1A
Theatre Square
math
1000
x265781
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