Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rayan
→ Pay attention
Before contest
Codeforces Round 997 (Div. 2)
41:41:47
Register now »
*has extra registration
→ 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
264B
Good Sequences
dp
,
number theory
1500
x10621
261A
Maxim and Discounts
greedy
,
sortings
1400
x5272
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2998
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3842
260A
Adding Digits
implementation
,
math
1400
x15101
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x7250
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4758
254B
Jury Size
brute force
,
implementation
1500
x2163
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2651
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10923
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x18184
250C
Movie Critics
greedy
1600
x2028
250B
Restoring IPv6
implementation
,
strings
1500
x2010
248B
Chilly Willy
math
,
number theory
1400
x5400
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9552
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2653
246B
Increase and Decrease
greedy
,
math
1300
x11449
245E
Mishap in Club
greedy
,
implementation
1400
x3312
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2349
245C
Game with Coins
greedy
1700
x1556
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4545
243A
The Brand New Function
bitmasks
1600
x3985
241A
Old Peykan
greedy
1300
x2262
239B
Easy Tape Programming
brute force
,
implementation
1500
x1378
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2056
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5916
237B
Young Table
implementation
,
sortings
1500
x2246
236B
Easy Number Challenge
implementation
,
number theory
1300
x14615
235A
LCM Challenge
number theory
1600
x18187
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1495
234E
Champions' League
implementation
1600
x1003
234D
Cinema
implementation
1600
x1546
234C
Weather
dp
,
implementation
1300
x5605
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7600
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2595
231D
Magic Box
brute force
,
geometry
1600
x4148
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8736
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3641
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x78395
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4791
229A
Shifts
brute force
,
two pointers
1500
x3552
228B
Two Tables
brute force
,
implementation
1400
x3482
227A
Where do I Turn?
geometry
1300
x4246
226A
Flying Saucer Segments
math
1400
x4029
225C
Barcode
dp
,
matrices
1700
x9315
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3183
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7397
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2553
222B
Cosmic Tables
data structures
,
implementation
1300
x6169
221B
Little Elephant and Numbers
implementation
1300
x4618
220A
Little Elephant and Problem
implementation
,
sortings
1300
x12076
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x9808
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6725
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5869
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1362
216B
Forming Teams
dfs and similar
,
implementation
1700
x6473
215B
Olympic Medal
greedy
,
math
1300
x5643
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x5028
213A
Game
dfs and similar
,
greedy
1700
x1732
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1795
209A
Multicolored Marbles
dp
,
math
1600
x2407
207D7
The Beaver's Problem - 3
1600
x102
207D5
The Beaver's Problem - 3
1600
x148
207B3
Military Trainings
1700
x181
207B1
Military Trainings
1600
x284
207A1
Beaver's Calculator 1.0
greedy
1600
x303
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x6065
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5328
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x5898
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1420
203C
Photographer
greedy
,
sortings
1400
x5730
203B
Game on Paper
brute force
,
implementation
1300
x2621
202B
Brand New Easy Problem
brute force
1700
x822
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x3027
198B
Jumping on Walls
shortest paths
1400
x4418
198A
About Bacteria
implementation
,
math
1700
x3170
197B
Limit
math
1400
x4667
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6437
195B
After Training
data structures
,
implementation
,
math
1300
x5231
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x4071
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10515
191B
Demonstration
greedy
1700
x1016
191A
Dynasty Puzzles
dp
1500
x4092
190C
STL
dfs and similar
1500
x2907
189B
Counting Rhombi
brute force
,
math
1300
x3973
189A
Cut Ribbon
brute force
,
dp
1300
x69020
188G
Array Sorting
*special problem
,
implementation
1600
x337
188F
Binary Notation
*special problem
,
implementation
1400
x307
188E
HQ9+
*special problem
,
implementation
1400
x506
188C
LCM
*special problem
,
implementation
,
math
1400
x459
188B
A + Reverse B
*special problem
,
implementation
1300
x744
187A
Permutations
greedy
1500
x2855
185A
Plant
math
1300
x5994
183B
Zoo
brute force
,
geometry
1700
x703
183A
Headquarters
constructive algorithms
,
math
1700
x561
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8189
181B
Number of Triplets
binary search
,
brute force
1300
x3079
180C
Letter
dp
1400
x7579
178D1
Magic Squares
1500
x653
178C1
Smart Beaver and Resolving Collisions
1600
x497
←
1
2
...
18
19
20
21
22
23
→
User lists
Name