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Codeforces Round (Div. 2)
8 days
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
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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Problems
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Custom test
Problems
#
Name
444A
DZY Loves Physics
greedy
,
math
1600
x3582
440B
Balancer
greedy
,
implementation
1600
x2338
435C
Cardiogram
implementation
1600
x2725
431C
k-Tree
dp
,
implementation
,
trees
1600
x29971
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2411
429B
Working out
dp
1600
x10306
424C
Magic Formulas
math
1600
x5967
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8733
411B
Multi-core Processor
implementation
1600
x1413
407B
Long Path
dp
,
implementation
1600
x7201
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x5176
405C
Unusual Product
implementation
,
math
1600
x4939
383A
Milking cows
data structures
,
greedy
1600
x5574
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2921
377A
Maze
dfs and similar
1600
x27356
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5442
375A
Divisible by Seven
math
,
number theory
1600
x5358
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2799
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x15685
371C
Hamburgers
binary search
,
brute force
1600
x34889
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x12113
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4963
353C
Find Maximum
implementation
,
math
,
number theory
1600
x5269
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6835
348A
Mafia
binary search
,
math
,
sortings
1600
x14761
346A
Alice and Bob
games
,
math
,
number theory
1600
x9365
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x18115
343A
Rational Resistance
math
,
number theory
1600
x10114
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4694
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x5241
333A
Secrets
greedy
1600
x4267
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x971
322B
Ciel and Flowers
combinatorics
,
math
1600
x13238
319A
Malek Dance Club
combinatorics
,
math
1600
x3030
317A
Perfect Pair
brute force
1600
x4942
316B2
EKG
dfs and similar
,
dp
1600
x1783
314A
Sereja and Contest
implementation
1600
x2176
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2667
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x5227
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3768
291D
Parallel Programming
*special problem
,
greedy
1600
x1539
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1858
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6877
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2836
269A
Magical Boxes
greedy
,
math
1600
x3702
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x4096
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2912
250C
Movie Critics
greedy
1600
x2231
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x10320
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2833
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4942
243A
The Brand New Function
bitmasks
1600
x4479
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x6786
235A
LCM Challenge
number theory
1600
x21115
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1589
234E
Champions' League
implementation
1600
x1051
234D
Cinema
implementation
1600
x1606
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2844
231D
Magic Box
brute force
,
geometry
1600
x4336
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x9758
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3399
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x7185
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5366
209A
Multicolored Marbles
dp
,
math
1600
x2881
207D7
The Beaver's Problem - 3
1600
x112
207D5
The Beaver's Problem - 3
1600
x157
207B1
Military Trainings
1600
x359
207A1
Beaver's Calculator 1.0
greedy
1600
x370
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6860
188G
Array Sorting
*special problem
,
implementation
1600
x346
178C1
Smart Beaver and Resolving Collisions
1600
x586
178B2
Greedy Merchants
1600
x774
178B1
Greedy Merchants
1600
x870
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1526
171G
Mysterious numbers - 2
*special problem
1600
x1067
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1486
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2189
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x13889
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2455
154B
Colliders
math
,
number theory
1600
x6166
154A
Hometask
greedy
1600
x4332
153A
A + B
*special problem
1600
x948
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x5353
149B
Martian Clock
implementation
1600
x2397
142A
Help Farmer
brute force
,
math
1600
x2847
139B
Wallpaper
implementation
,
math
1600
x1463
138A
Literature Lesson
implementation
1600
x2591
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2659
131D
Subway
dfs and similar
,
graphs
1600
x5276
130H
Balanced brackets
*special problem
1600
x930
130F
Prime factorization
*special problem
1600
x300
130E
Tribonacci numbers
*special problem
1600
x323
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x1088
113A
Grammar Lessons
implementation
,
strings
1600
x2608
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x4293
100E
Lamps in a Line
*special problem
,
math
1600
x305
95A
Hockey
implementation
,
strings
1600
x1858
86A
Reflection
math
1600
x1663
75C
Modified GCD
binary search
,
number theory
1600
x16092
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1644
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