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Before contest
Codeforces Round 994 (Div. 2)
19:25:59
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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
two pointers
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Status
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Custom test
Problems
#
Name
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4822
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3517
291D
Parallel Programming
*special problem
,
greedy
1600
x1481
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1686
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6596
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2636
269A
Magical Boxes
greedy
,
math
1600
x3539
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3837
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2645
250C
Movie Critics
greedy
1600
x2013
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9519
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2645
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4530
243A
The Brand New Function
bitmasks
1600
x3963
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5888
235A
LCM Challenge
number theory
1600
x18070
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1484
234E
Champions' League
implementation
1600
x1002
234D
Cinema
implementation
1600
x1541
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2574
231D
Magic Box
brute force
,
geometry
1600
x4118
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8705
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3169
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6701
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5017
209A
Multicolored Marbles
dp
,
math
1600
x2389
207D7
The Beaver's Problem - 3
1600
x101
207D5
The Beaver's Problem - 3
1600
x147
207B1
Military Trainings
1600
x282
207A1
Beaver's Calculator 1.0
greedy
1600
x301
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6413
188G
Array Sorting
*special problem
,
implementation
1600
x336
178C1
Smart Beaver and Resolving Collisions
1600
x496
178B2
Greedy Merchants
1600
x683
178B1
Greedy Merchants
1600
x771
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1328
171G
Mysterious numbers - 2
*special problem
1600
x936
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1288
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2046
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12418
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2239
154B
Colliders
math
,
number theory
1600
x4834
154A
Hometask
greedy
1600
x4076
153A
A + B
*special problem
1600
x823
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4253
149B
Martian Clock
implementation
1600
x2266
142A
Help Farmer
brute force
,
math
1600
x2639
139B
Wallpaper
implementation
,
math
1600
x1314
138A
Literature Lesson
implementation
1600
x2397
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2377
131D
Subway
dfs and similar
,
graphs
1600
x4721
130H
Balanced brackets
*special problem
1600
x609
130F
Prime factorization
*special problem
1600
x278
130E
Tribonacci numbers
*special problem
1600
x296
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x934
113A
Grammar Lessons
implementation
,
strings
1600
x2307
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3532
100E
Lamps in a Line
*special problem
,
math
1600
x276
95A
Hockey
implementation
,
strings
1600
x1688
86A
Reflection
math
1600
x1428
75C
Modified GCD
binary search
,
number theory
1600
x12990
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1380
72H
Reverse It!
*special problem
,
implementation
1600
x267
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6603
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1785
68B
Energy exchange
binary search
1600
x4713
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x340
59C
Title
expression parsing
1600
x2117
57B
Martian Architecture
implementation
1600
x1024
55B
Smallest number
brute force
1600
x2896
52B
Right Triangles
combinatorics
1600
x2083
46C
Hamsters and Tigers
two pointers
1600
x2474
40B
Repaintings
math
1600
x1178
36B
Fractal
implementation
1600
x1524
34D
Road Map
dfs and similar
,
graphs
1600
x5254
32D
Constellation
implementation
1600
x1293
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4759
28A
Bender Problem
implementation
1600
x804
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3400
11B
Jumping Jack
math
1600
x4785
7B
Memory Manager
implementation
1600
x2625
1B
Spreadsheet
implementation
,
math
1600
x23104
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