Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 2)
4 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x2663
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x3053
1809D
Binary String Sorting
constructive algorithms
,
greedy
1800
x4471
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x4368
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x4407
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x4624
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x4385
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x3797
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x4462
1769D1
Игра в Девятку I
*special problem
,
brute force
,
dp
1800
x328
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x5488
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x2936
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x5539
1750D
Count GCD
combinatorics
,
math
,
number theory
1800
x4568
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x3422
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5126
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x4517
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x5873
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x5842
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2117
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2061
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x5308
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5017
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x4747
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5013
1709C
Recover an RBS
constructive algorithms
,
greedy
,
implementation
,
strings
1800
x7604
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x5473
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x4625
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x5749
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x4163
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4293
1666L
Labyrinth
dfs and similar
,
graphs
1800
x2595
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x2697
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x5486
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x6566
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x5299
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x4947
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x5697
1619D
New Year's Problem
binary search
,
greedy
,
sortings
1800
x6319
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4135
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x5345
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x4896
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x4377
1575D
Divisible by Twenty-Five
brute force
,
dfs and similar
,
dp
1800
x2066
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x7454
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x285
1571C
Rhyme
*special problem
,
implementation
1800
x330
1560E
Polycarp and String Transformation
binary search
,
implementation
,
sortings
,
strings
1800
x6928
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x5497
1556C
Compressed Bracket Sequence
brute force
,
implementation
1800
x5331
1554D
Diane
constructive algorithms
,
greedy
,
strings
1800
x8130
1554C
Mikasa
binary search
,
bitmasks
,
greedy
,
implementation
1800
x7724
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6081
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5475
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x8096
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x6810
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5250
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x8275
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x6622
1509C
The Sports Festival
dp
,
greedy
1800
x10254
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3524
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1635
1505D
Xenolith? Hippodrome?
*special problem
,
number theory
1800
x676
1500A
Going Home
brute force
,
hashing
,
implementation
,
math
1800
x7971
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6309
1488B
RBS Deletion
*special problem
,
greedy
1800
x492
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x5303
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x8683
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x3278
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x6376
1463C
Busy Robot
implementation
1800
x5101
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x5956
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x4983
1446B
Catching Cheaters
dp
,
strings
1800
x6904
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4017
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x7869
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x9156
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x6684
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x6659
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x6973
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1006
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8124
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x10167
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x9878
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6041
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x8769
1381B
Unmerge
dp
1800
x7880
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x7570
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x9551
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x7513
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7390
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x6670
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x8349
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x11494
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x7945
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x8646
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x7428
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x6691
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x5733
1299B
Aerodynamic
geometry
1800
x4831
←
1
2
3
4
→
User lists
Name