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Codeforces Round (Div. 2)
5 days
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binary search
combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x8086
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x5300
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2910
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1319
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x2299
325B
Stadium and Games
binary search
,
math
1800
x1682
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3943
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x627
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1659
309E
Sheep
binary search
,
greedy
2900
x307
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1540
309A
Morning run
binary search
,
math
,
two pointers
2000
x564
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x9608
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2901
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1148
287B
Pipeline
binary search
,
math
1700
x12108
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x81334
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x10956
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x16070
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x552
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x2037
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2229
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x619
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x12610
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x22345
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x553
248C
Robo-Footballer
binary search
,
geometry
2000
x915
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x4946
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x1004
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x1062
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x6951
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x8431
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x586
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2890
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x10014
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x102588
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x6119
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3437
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2361
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1511
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x691
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x9974
204B
Little Elephant and Cards
binary search
,
data structures
1500
x6058
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x6853
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x20402
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x551
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x1068
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x596
198C
Delivering Carcinogen
binary search
,
geometry
2400
x454
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x10405
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x11763
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x998
185E
Soap Time! - 2
binary search
,
data structures
3000
x272
181B
Number of Triplets
binary search
,
brute force
1300
x3630
180E
Cubes
binary search
,
dp
,
two pointers
1800
x2173
177E2
Space Voyage
binary search
1900
x507
177E1
Space Voyage
binary search
1700
x732
166A
Rank List
binary search
,
implementation
,
sortings
1100
x21712
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x14219
165B
Burning Midnight Oil
binary search
,
implementation
1500
x24422
164D
Minimum Diameter
binary search
,
brute force
3100
x399
163B
Lemmings
binary search
2000
x1212
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x5642
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x783
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x3242
152B
Steps
binary search
,
implementation
1300
x7533
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x1166
147B
Smile House
binary search
,
graphs
,
matrices
2500
x1025
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4879
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x997
131F
Present to Mom
binary search
,
two pointers
2000
x835
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x26867
126A
Hot Bath
binary search
,
brute force
,
math
1900
x1622
125E
MST Company
binary search
,
graphs
2400
x1703
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x367
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x4203
101B
Buses
binary search
,
data structures
,
dp
1700
x3255
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x374
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x20109
91B
Queue
binary search
,
data structures
1500
x8091
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x1189
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x2580
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x647
84C
Biathlon
binary search
,
implementation
1700
x1886
83B
Doctor
binary search
,
math
,
sortings
1800
x1919
78D
Archer's Shot
binary search
,
geometry
,
math
,
two pointers
2300
x428
76F
Tourist
binary search
,
data structures
,
dp
2300
x875
75C
Modified GCD
binary search
,
number theory
1600
x16840
73B
Need For Brake
binary search
,
greedy
,
sortings
2000
x584
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x666
68B
Energy exchange
binary search
1600
x5865
67D
Optical Experiment
binary search
,
data structures
,
dp
1900
x1819
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x899
62B
Tyndex.Brome
binary search
,
implementation
1800
x1430
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2976
53B
Blog Photo
binary search
,
implementation
1700
x1600
51C
Three Base Stations
binary search
,
greedy
1800
x3054
50D
Bombing
binary search
,
dp
,
probabilities
2100
x760
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x984
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x751
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