Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Please read
the new rule regarding the restriction on the use of AI tools
.
×
→ Pay attention
Before contest
Codeforces Round (Div. 2)
4 days
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
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x16199
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x19070
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x842
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2664
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3907
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x17208
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x20019
1788A
One and Two
brute force
,
implementation
,
math
800
x30653
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x212
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x230
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x435
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x682
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2343
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3395
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x7072
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x13238
1787A
Exponential Equation
constructive algorithms
,
math
800
x19197
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8965
1786A2
Alternating Deck (hard version)
implementation
800
x11410
1786A1
Non-alternating Deck (easy version)
implementation
800
x14038
1784F
Minimums or Medians
3400
x234
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x337
1784D
Wooden Spoon
combinatorics
,
dp
2400
x1023
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1652
1784B
Letter Exchange
constructive algorithms
1900
x3331
1784A
Monsters (easy version)
brute force
,
greedy
1000
x15123
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x478
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x1016
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2104
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4424
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x9287
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17755
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x30159
1781H2
Window Signals (hard version)
3500
x91
1781H1
Window Signals (easy version)
3200
x116
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x222
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x862
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1304
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5493
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7591
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13521
1781A
Parallel Projection
geometry
,
math
800
x15064
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x724
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1475
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1434
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4930
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x18053
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21684
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x142
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x320
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1259
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1758
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7901
1779C
Least Prefix Sum
data structures
,
greedy
1600
x12381
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x23587
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x23144
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x657
1778E
The Tree Has Fallen!
bitmasks
,
dfs and similar
,
math
,
trees
2500
x876
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2762
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x8206
1778B
The Forbidden Permutation
greedy
,
math
1300
x13290
1778A
Flip Flop Sum
greedy
,
implementation
800
x24306
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x936
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1853
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3477
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x8512
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x17481
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x24348
1776N
Count Permutations
math
3500
x82
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x372
1776L
Controllers
binary search
,
math
1500
x6013
1776K
Uniform Chemistry
dp
,
math
3200
x68
1776J
Italian Data Centers
graphs
,
shortest paths
2500
x653
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x676
1776H
Beppa and SwerChat
two pointers
1300
x6386
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x2045
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3450
1776E
Crossing the Railways
data structures
,
dp
3500
x70
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x363
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x798
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1325
1776A
Walking Boy
greedy
800
x6974
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x763
1775E
The Human Equation
greedy
,
implementation
2100
x3200
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x6259
1775C
Interesting Sequence
bitmasks
,
math
1600
x10431
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x13858
1775A2
Gardener and the Capybaras (hard version)
constructive algorithms
,
greedy
900
x18729
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19647
1774H
Maximum Permutation
constructive algorithms
3500
x134
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x438
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x678
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1077
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3476
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7852
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x12001
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x12241
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22396
1773L
Lisa's Sequences
dp
3500
x43
1773K
King's Puzzle
constructive algorithms
1900
x1413
←
1
2
...
13
14
15
16
17
...
98
99
→
User lists
Name