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Rayan
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Before contest
Codeforces Round (Div. 3)
6 days
→ Filter Problems
Difficulty:
—
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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Problems
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Status
Standings
Custom test
Problems
#
Name
322B
Ciel and Flowers
combinatorics
,
math
1600
x12026
319A
Malek Dance Club
combinatorics
,
math
1600
x2855
317A
Perfect Pair
brute force
1600
x4713
316B2
EKG
dfs and similar
,
dp
1600
x1610
314A
Sereja and Contest
implementation
1600
x2087
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2487
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4907
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3567
291D
Parallel Programming
*special problem
,
greedy
1600
x1486
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1709
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6623
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2648
269A
Magical Boxes
greedy
,
math
1600
x3564
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3881
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2684
250C
Movie Critics
greedy
1600
x2047
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9601
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2663
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4567
243A
The Brand New Function
bitmasks
1600
x4020
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5950
235A
LCM Challenge
number theory
1600
x18377
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1497
234E
Champions' League
implementation
1600
x1007
234D
Cinema
implementation
1600
x1550
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2611
231D
Magic Box
brute force
,
geometry
1600
x4160
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8824
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3196
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6750
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5047
209A
Multicolored Marbles
dp
,
math
1600
x2431
207D7
The Beaver's Problem - 3
1600
x102
207D5
The Beaver's Problem - 3
1600
x148
207B1
Military Trainings
1600
x286
207A1
Beaver's Calculator 1.0
greedy
1600
x305
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6454
188G
Array Sorting
*special problem
,
implementation
1600
x337
178C1
Smart Beaver and Resolving Collisions
1600
x501
178B2
Greedy Merchants
1600
x688
178B1
Greedy Merchants
1600
x776
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1363
171G
Mysterious numbers - 2
*special problem
1600
x951
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1308
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2054
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12671
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2262
154B
Colliders
math
,
number theory
1600
x5071
154A
Hometask
greedy
1600
x4114
153A
A + B
*special problem
1600
x883
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4405
149B
Martian Clock
implementation
1600
x2292
142A
Help Farmer
brute force
,
math
1600
x2659
139B
Wallpaper
implementation
,
math
1600
x1332
138A
Literature Lesson
implementation
1600
x2411
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2418
131D
Subway
dfs and similar
,
graphs
1600
x4804
130H
Balanced brackets
*special problem
1600
x625
130F
Prime factorization
*special problem
1600
x282
130E
Tribonacci numbers
*special problem
1600
x302
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x944
113A
Grammar Lessons
implementation
,
strings
1600
x2321
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3618
100E
Lamps in a Line
*special problem
,
math
1600
x280
95A
Hockey
implementation
,
strings
1600
x1702
86A
Reflection
math
1600
x1462
75C
Modified GCD
binary search
,
number theory
1600
x13258
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1392
72H
Reverse It!
*special problem
,
implementation
1600
x270
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6758
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1797
68B
Energy exchange
binary search
1600
x4835
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x343
59C
Title
expression parsing
1600
x2146
57B
Martian Architecture
implementation
1600
x1032
55B
Smallest number
brute force
1600
x2948
52B
Right Triangles
combinatorics
1600
x2113
46C
Hamsters and Tigers
two pointers
1600
x2532
40B
Repaintings
math
1600
x1196
36B
Fractal
implementation
1600
x1559
34D
Road Map
dfs and similar
,
graphs
1600
x5371
32D
Constellation
implementation
1600
x1318
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4817
28A
Bender Problem
implementation
1600
x816
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3444
11B
Jumping Jack
math
1600
x4989
7B
Memory Manager
implementation
1600
x2649
1B
Spreadsheet
implementation
,
math
1600
x23490
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