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)
7 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
1941A
Rudolf and the Ticket
brute force
,
math
800
x42093
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x143
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x35
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x198
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x83
1939D
Big Persimmon
*special problem
,
dp
,
games
x87
1939C
More Gifts
*special problem
,
dfs and similar
,
two pointers
x302
1939B
Evidence Board
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
x234
1939A
Draw Polygon Lines
*special problem
,
constructive algorithms
,
dp
,
geometry
,
interactive
x24
1938M
Zig-zag
3500
x57
1938L
XOR Operations
2800
x291
1938K
Tree Quiz
2400
x621
1938J
There and Back Again
2100
x1270
1938I
Symmetric Boundary
2800
x75
1938H
Pho Restaurant
1600
x2119
1938G
Personality Test
2300
x1040
1938F
Forming Groups
2400
x742
1938E
Duplicates
2200
x997
1938D
Bánh Bò
3300
x90
1938C
Bit Counting Sequence
1900
x1452
1938B
Attraction Score
3000
x192
1938A
Antiparticle Antiphysics
3500
x52
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x14872
1937A
Shuffle Party
implementation
,
math
800
x23003
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x142
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x112
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x503
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1302
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2868
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x7378
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x443
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1350
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x8147
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x8094
1935B
Informatics in MAC
constructive algorithms
1200
x18357
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x27775
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x234
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1378
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3473
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6724
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x18692
1934A
Too Min Too Max
greedy
,
math
800
x25208
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x969
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2468
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x11108
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x20059
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x22459
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x32671
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x37881
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x1062
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x4065
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x8086
1932D
Card Game
greedy
,
implementation
1400
x11337
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x15585
1932B
Chaya Calendar
number theory
1100
x20565
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x29313
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2786
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x7950
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x15663
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x18661
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x28855
1931B
Make Equal
greedy
800
x31985
1931A
Recovering a Small String
brute force
,
strings
800
x35940
1930I
Counting Is Fun
combinatorics
3500
x70
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x152
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x335
1930F
Maximize the Difference
bitmasks
,
brute force
,
dfs and similar
2700
x705
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x1123
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2611
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x4082
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x7005
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x15122
1930A
Maximise The Score
greedy
,
sortings
800
x18447
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1784
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1670
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4738
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x14720
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x25120
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x31253
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x238
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1696
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x4221
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x8467
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x17245
1928A
Rectangle Cutting
geometry
,
math
800
x22457
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1654
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x4315
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x13889
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x21233
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x27737
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x32898
1927A
Make it White
greedy
,
strings
800
x42737
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x3509
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1691
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x11785
1926D
Vlad and Division
bitmasks
,
greedy
1300
x15393
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x26391
1926B
Vlad and Shapes
geometry
,
implementation
800
x32231
1926A
Vlad and the Best of Five
implementation
800
x47460
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3619
←
1
2
...
4
5
6
7
8
...
98
99
→
User lists
Name