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Please read
the new rule regarding the restriction on the use of AI tools
.
×
→ Pay attention
Before contest
Codeforces Round 975 (Div. 1)
3 days
Before contest
Codeforces Round 975 (Div. 2)
3 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
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Custom test
Problems
#
Name
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2595
250C
Movie Critics
greedy
1600
x1928
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9404
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2623
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4466
243A
The Brand New Function
bitmasks
1600
x3907
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5728
235A
LCM Challenge
number theory
1600
x17644
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1473
234E
Champions' League
implementation
1600
x1000
234D
Cinema
implementation
1600
x1529
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2515
231D
Magic Box
brute force
,
geometry
1600
x4077
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8593
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3148
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6648
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4955
209A
Multicolored Marbles
dp
,
math
1600
x2330
207D7
The Beaver's Problem - 3
1600
x100
207D5
The Beaver's Problem - 3
1600
x141
207B1
Military Trainings
1600
x266
207A1
Beaver's Calculator 1.0
greedy
1600
x285
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6276
188G
Array Sorting
*special problem
,
implementation
1600
x333
178C1
Smart Beaver and Resolving Collisions
1600
x475
178B2
Greedy Merchants
1600
x674
178B1
Greedy Merchants
1600
x758
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1310
171G
Mysterious numbers - 2
*special problem
1600
x920
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1269
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2029
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12191
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2226
154B
Colliders
math
,
number theory
1600
x4568
154A
Hometask
greedy
1600
x4041
153A
A + B
*special problem
1600
x819
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4122
149B
Martian Clock
implementation
1600
x2254
142A
Help Farmer
brute force
,
math
1600
x2610
139B
Wallpaper
implementation
,
math
1600
x1298
138A
Literature Lesson
implementation
1600
x2383
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2343
131D
Subway
dfs and similar
,
graphs
1600
x4656
130H
Balanced brackets
*special problem
1600
x592
130F
Prime factorization
*special problem
1600
x278
130E
Tribonacci numbers
*special problem
1600
x296
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x921
113A
Grammar Lessons
implementation
,
strings
1600
x2292
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3448
100E
Lamps in a Line
*special problem
,
math
1600
x271
95A
Hockey
implementation
,
strings
1600
x1667
86A
Reflection
math
1600
x1371
75C
Modified GCD
binary search
,
number theory
1600
x12587
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1337
72H
Reverse It!
*special problem
,
implementation
1600
x264
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6468
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1764
68B
Energy exchange
binary search
1600
x4423
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x337
59C
Title
expression parsing
1600
x2085
57B
Martian Architecture
implementation
1600
x1011
55B
Smallest number
brute force
1600
x2839
52B
Right Triangles
combinatorics
1600
x2040
46C
Hamsters and Tigers
two pointers
1600
x2420
40B
Repaintings
math
1600
x1161
36B
Fractal
implementation
1600
x1484
34D
Road Map
dfs and similar
,
graphs
1600
x5105
32D
Constellation
implementation
1600
x1275
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4609
28A
Bender Problem
implementation
1600
x794
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3332
11B
Jumping Jack
math
1600
x4675
7B
Memory Manager
implementation
1600
x2594
1B
Spreadsheet
implementation
,
math
1600
x22537
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