Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
two pointers
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
580B
Kefa and Company
binary search
,
sortings
,
two pointers
1500
x25017
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x1001
430B
Balls Game
brute force
,
two pointers
1400
x3634
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7520
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8098
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8674
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9008
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9238
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x9288
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9516
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10337
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10457
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10778
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12532
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12894
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12940
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13004
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x13053
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13863
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13980
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15232
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15835
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16074
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16122
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19085
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x22291
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26857
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x48155
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3533
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4688
1776H
Beppa and SwerChat
two pointers
1300
x6042
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7388
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9660
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10144
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10782
716B
Complete the Word
greedy
,
two pointers
1300
x11838
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11998
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12306
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12551
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13956
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14557
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14789
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15904
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16800
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18484
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x18508
1366B
Shuffle
math
,
two pointers
1300
x19670
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21332
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27127
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27579
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3238
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7797
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8679
842A
Kirill And The Game
brute force
,
two pointers
1200
x9971
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10615
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11393
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11928
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13061
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14508
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15442
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15612
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18262
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18963
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19331
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20096
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20114
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20348
1133C
Balanced Team
sortings
,
two pointers
1200
x21404
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26850
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27833
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29359
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x36475
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46757
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11740
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12999
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13469
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14864
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17246
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17560
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17751
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x18310
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19786
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20097
1547C
Pair Programming
greedy
,
two pointers
1100
x22053
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23331
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18841
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19164
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21395
1760D
Challenging Valleys
implementation
,
two pointers
1000
x22483
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24426
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24475
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24812
1690D
Black and White Stripe
implementation
,
two pointers
1000
x27017
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27110
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x13493
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15821
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16396
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16778
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x18475
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20884
←
1
2
3
4
5
6
→
User lists
Name