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Codeforces Round 1002 (Div. 2)
3 days
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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
227A
Where do I Turn?
geometry
1300
x4304
226E
Noble Knight's Path
data structures
,
trees
2900
x473
226D
The table
constructive algorithms
,
greedy
2100
x981
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x922
226B
Naughty Stone Piles
greedy
1900
x1575
226A
Flying Saucer Segments
math
1400
x4053
225E
Unsolvable
math
,
number theory
2100
x825
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x954
225C
Barcode
dp
,
matrices
1700
x9365
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3194
225A
Dice Tower
constructive algorithms
,
greedy
1100
x11950
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7433
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x27457
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x193
223D
Spider
geometry
,
graphs
3000
x71
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1603
223B
Two Strings
data structures
,
dp
,
strings
1900
x1832
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2557
222E
Decoding Genome
dp
,
matrices
1900
x2908
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2185
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2383
222B
Cosmic Tables
data structures
,
implementation
1300
x6199
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10955
221B
Little Elephant and Numbers
implementation
1300
x4632
221A
Little Elephant and Function
implementation
,
math
1000
x15522
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1443
220D
Little Elephant and Triangle
geometry
,
math
2500
x290
220C
Little Elephant and Shifts
data structures
2100
x954
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x10667
220A
Little Elephant and Problem
implementation
,
sortings
1300
x12086
219E
Parking Lot
data structures
2200
x622
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x9861
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6734
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5873
219A
k-String
implementation
,
strings
1000
x28768
218B
Airport
implementation
1100
x16807
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x9654
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x330
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x252
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x342
217B
Blackboard Fibonacci
brute force
,
math
2100
x905
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x21557
216E
Martian Luck
math
,
number theory
2000
x594
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1366
216C
Hiring Staff
greedy
1800
x1860
216B
Forming Teams
dfs and similar
,
implementation
1700
x6492
216A
Tiling with Hexagons
implementation
,
math
1200
x5056
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x583
215D
Hot Days
greedy
1900
x1615
215C
Crosses
brute force
,
implementation
2100
x674
215B
Olympic Medal
greedy
,
math
1300
x5656
215A
Bicycle Chain
brute force
,
implementation
900
x14824
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5040
214A
System of Equations
brute force
800
x36666
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x847
213D
Stars
constructive algorithms
,
geometry
2300
x343
213C
Relay Race
dp
2000
x2931
213B
Numbers
combinatorics
,
dp
1900
x1801
213A
Game
dfs and similar
,
greedy
1700
x1737
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1807
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x525
212C
Cowboys
combinatorics
,
dp
,
math
2100
x394
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x336
212A
Privatization
flows
,
graphs
3000
x206
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x767
209B
Pixels
constructive algorithms
,
math
2100
x405
209A
Multicolored Marbles
dp
,
math
1600
x2421
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x7096
208D
Prizes, Prizes, more Prizes
implementation
1200
x7635
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1921
208B
Solitaire
dfs and similar
,
dp
1900
x1373
208A
Dubstep
strings
900
x91551
207D9
The Beaver's Problem - 3
1800
x90
207D8
The Beaver's Problem - 3
2300
x95
207D7
The Beaver's Problem - 3
1600
x102
207D6
The Beaver's Problem - 3
2100
x84
207D5
The Beaver's Problem - 3
1600
x148
207D4
The Beaver's Problem - 3
2100
x154
207D3
The Beaver's Problem - 3
2000
x136
207D2
The Beaver's Problem - 3
2000
x111
207D10
The Beaver's Problem - 3
2100
x82
207D1
The Beaver's Problem - 3
1800
x117
207C3
Game with Two Trees
data structures
2700
x134
207C2
Game with Two Trees
2200
x90
207C1
Game with Two Trees
2100
x107
207B3
Military Trainings
1700
x182
207B2
Military Trainings
1900
x198
207B1
Military Trainings
1600
x284
207A3
Beaver's Calculator 1.0
greedy
2000
x223
207A2
Beaver's Calculator 1.0
greedy
1800
x245
207A1
Beaver's Calculator 1.0
greedy
1600
x303
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x6070
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x22917
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1191
204D
Little Elephant and Retro Strings
dp
2400
x589
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1137
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5340
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x5911
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x288
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1420
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