Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
4 days
Before contest
Codeforces Round 941 (Div. 2)
4 days
→ Filter Problems
Difficulty:
—
bitmasks
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
1835F
Good Graph
bitmasks
,
dfs and similar
,
graph matchings
,
graphs
,
implementation
3500
x137
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x143
1515H
Phoenix and Bits
bitmasks
,
brute force
,
data structures
,
sortings
3500
x209
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x214
1450G
Communism
bitmasks
,
dp
,
trees
3500
x227
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x283
1292F
Nora's Toy Boxes
bitmasks
,
combinatorics
,
dp
3500
x297
1305G
Kuroni and Antihype
bitmasks
,
brute force
,
dp
,
dsu
,
graphs
3500
x937
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x92
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x67
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x118
1804H
Code Lock
bitmasks
,
dp
3300
x168
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x302
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x332
1523F
Favorite Game
bitmasks
,
dp
3300
x394
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x146
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x270
1214G
Feeling Good
bitmasks
,
data structures
3200
x279
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x383
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x439
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x456
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x585
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x600
1261F
Xor-Set
bitmasks
,
divide and conquer
,
math
3100
x370
1103D
Professional layer
bitmasks
,
dp
3100
x394
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x397
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x521
1463F
Max Correct Set
bitmasks
,
dp
,
math
3100
x549
1383C
String Transformation 2
bitmasks
,
dp
,
graphs
,
trees
3100
x556
1948G
MST with Matching
bitmasks
,
brute force
,
dsu
,
graph matchings
,
trees
3100
x564
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x596
1423I
Lookup Tables
bitmasks
3000
x101
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x244
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x322
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x414
1552G
A Serious Referee
bitmasks
,
brute force
,
dfs and similar
,
sortings
3000
x446
582E
Boolean Function
bitmasks
,
dp
,
expression parsing
3000
x475
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x555
1152F2
Neko Rules the Catniverse (Large Version)
bitmasks
,
dp
,
matrices
3000
x588
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x634
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x664
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x671
1616H
Keep XOR Low
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
,
dp
,
math
3000
x777
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1414
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x117
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x244
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x300
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x327
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x353
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x441
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x505
1221G
Graph And Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
meet-in-the-middle
2900
x518
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x570
878D
Magic Breeding
bitmasks
2900
x640
1553H
XOR and Distance
bitmasks
,
divide and conquer
,
trees
2900
x669
938G
Shortest Path Queries
bitmasks
,
data structures
,
dsu
,
graphs
2900
x853
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x949
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x169
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x318
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x364
850E
Random Elections
bitmasks
,
brute force
,
divide and conquer
,
fft
,
math
2800
x378
472G
Design Tutorial: Increase the Constraints
bitmasks
,
data structures
,
fft
2800
x390
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x401
1386C
Joker
*special problem
,
bitmasks
,
data structures
,
divide and conquer
,
dsu
2800
x427
83E
Two Subsequences
bitmasks
,
dp
2800
x450
685E
Travelling Through the Snow Queen's Kingdom
bitmasks
,
brute force
,
divide and conquer
,
graphs
2800
x502
1152F1
Neko Rules the Catniverse (Small Version)
bitmasks
,
dp
,
matrices
2800
x510
1322D
Reality Show
bitmasks
,
dp
2800
x691
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x710
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x913
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x936
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x1047
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x109
575C
Party
bitmasks
,
brute force
,
graph matchings
2700
x211
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x229
1016G
Appropriate Team
bitmasks
,
math
,
number theory
2700
x253
76C
Mutation
bitmasks
,
dp
,
math
2700
x267
504D
Misha and XOR
bitmasks
2700
x297
1036G
Sources and Sinks
bitmasks
,
brute force
,
dfs and similar
2700
x360
1543E
The Final Pursuit
bitmasks
,
constructive algorithms
,
divide and conquer
,
graphs
,
greedy
,
math
2700
x393
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x407
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x409
251D
Two Sets
bitmasks
,
math
2700
x441
938F
Erasing Substrings
bitmasks
,
dp
,
greedy
2700
x466
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x510
772D
Varying Kibibits
bitmasks
,
dp
2700
x565
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x575
1930F
Maximize the Difference
bitmasks
,
brute force
,
dfs and similar
2700
x595
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x622
1795G
Removal Sequences
bitmasks
,
dfs and similar
,
graphs
2700
x641
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x647
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x696
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x748
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x936
1148F
Foo Fighters
bitmasks
,
constructive algorithms
2700
x966
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1039
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1108
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1301
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x283
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x293
←
1
2
3
...
5
6
→
User lists
Name