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Rayan
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Before contest
Codeforces Round 995 (Div. 3)
13:31:55
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combine-tags-by-or
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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
#
Name
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x16982
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x5280
16D
Logging
implementation
,
strings
1900
x1637
16C
Monitor
binary search
,
number theory
1800
x4828
16B
Burglar and Matches
greedy
,
implementation
,
sortings
900
x18335
16A
Flag
implementation
800
x14670
15E
Triangles
combinatorics
,
dp
2600
x590
15D
Map
data structures
,
implementation
,
sortings
2500
x772
15C
Industrial Nim
games
2000
x2362
15B
Laser
math
1800
x1481
15A
Cottage Village
implementation
,
sortings
1200
x3955
14E
Camels
dp
1900
x1736
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4625
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3425
14B
Young Photographer
implementation
1000
x7157
14A
Letter
implementation
800
x10816
13E
Holes
data structures
,
dsu
2700
x6220
13D
Triangles
dp
,
geometry
2600
x669
13C
Sequence
dp
,
sortings
2200
x4728
13B
Letter A
geometry
,
implementation
2000
x1009
13A
Numbers
implementation
,
math
1000
x7921
12E
Start of the session
constructive algorithms
2100
x1241
12D
Ball
data structures
,
sortings
2400
x2364
12C
Fruits
greedy
,
implementation
,
sortings
1100
x6306
12B
Correct Solution?
implementation
,
sortings
1100
x8671
12A
Super Agent
implementation
800
x13344
11E
Forward, march!
binary search
,
dp
,
greedy
2800
x372
11D
A Simple Task
bitmasks
,
dp
,
graphs
2200
x5024
11C
How Many Squares?
implementation
2200
x620
11B
Jumping Jack
math
1600
x4791
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x13612
10E
Greedy Change
constructive algorithms
2600
x841
10D
LCIS
dp
2800
x4560
10C
Digital Root
number theory
2000
x1473
10B
Cinema Cashier
dp
,
implementation
1500
x1800
10A
Power Consumption Calculation
implementation
900
x7296
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x1053
9D
How many trees?
combinatorics
,
divide and conquer
,
dp
1900
x3939
9C
Hexadecimal's Numbers
brute force
,
implementation
,
math
1200
x13106
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5561
9A
Die Roll
math
,
probabilities
800
x58211
8E
Beads
dp
,
graphs
2600
x700
8D
Two Friends
binary search
,
geometry
2600
x534
8C
Looking for Order
bitmasks
,
dp
2000
x3629
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4407
8A
Train and Peter
strings
1200
x5980
7E
Defining Macros
dp
,
expression parsing
,
implementation
2600
x725
7D
Palindrome Degree
hashing
,
strings
2200
x3804
7C
Line
math
,
number theory
1800
x4704
7B
Memory Manager
implementation
1600
x2627
7A
Kalevitch and Chess
brute force
,
constructive algorithms
1100
x7294
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3352
6D
Lizards and Basements 2
brute force
,
dp
2600
x2030
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x14466
6B
President's Office
implementation
1100
x13228
6A
Triangle
brute force
,
geometry
900
x20180
5E
Bindian Signalizing
data structures
2400
x2175
5D
Follow Traffic Rules
implementation
,
math
2100
x1733
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x14297
5B
Center Alignment
implementation
,
strings
1200
x6002
5A
Chat Servers Outgoing Traffic
implementation
1000
x9841
4D
Mysterious Present
dp
,
sortings
1700
x10502
4C
Registration System
data structures
,
hashing
,
implementation
1300
x85997
4B
Before an Exam
constructive algorithms
,
greedy
1200
x25490
4A
Watermelon
brute force
,
math
800
x545533
3D
Least Cost Bracket Sequence
greedy
2600
x3437
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7437
3B
Lorry
greedy
,
sortings
1900
x4636
3A
Shortest path of the king
greedy
,
shortest paths
1000
x19627
2C
Commentator problem
geometry
2600
x1783
2B
The least round way
dp
,
math
2000
x11086
2A
Winner
hashing
,
implementation
1500
x26885
1C
Ancient Berland Circus
geometry
,
math
2100
x5770
1B
Spreadsheet
implementation
,
math
1600
x23116
1A
Theatre Square
math
1000
x269034
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