Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
greedy
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
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4111
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4123
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4128
43C
Lucky Tickets
greedy
1300
x4133
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4140
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4154
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4160
792C
Divide by Three
dp
,
greedy
,
math
,
number theory
2000
x4161
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4183
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4183
3B
Lorry
greedy
,
sortings
1900
x4188
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4192
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4193
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4222
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4224
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4228
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4241
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4284
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4293
412A
Poster
greedy
,
implementation
900
x4295
1907F
Shift and Reverse
greedy
,
sortings
1800
x4296
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4307
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4309
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4311
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4312
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4320
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4325
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4339
1077E
Thematic Contests
greedy
,
sortings
1800
x4340
979B
Treasure Hunt
greedy
1800
x4343
825C
Multi-judge Solving
greedy
,
implementation
1600
x4344
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4346
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4352
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4369
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4374
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4375
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4379
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4381
1567D
Expression Evaluation Error
constructive algorithms
,
greedy
,
implementation
,
math
2000
x4385
1765N
Number Reduction
greedy
1500
x4389
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4396
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4397
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4397
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4400
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4401
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4403
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4421
1791G2
Teleporters (Hard Version)
binary search
,
greedy
,
sortings
1900
x4425
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4428
1493C
K-beautiful Strings
binary search
,
brute force
,
constructive algorithms
,
greedy
,
strings
2000
x4445
1632D
New Year Concert
binary search
,
data structures
,
greedy
,
math
,
number theory
,
two pointers
2000
x4446
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4447
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4463
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4478
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4481
90A
Cableway
greedy
,
math
1000
x4484
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4490
1661D
Progressions Covering
data structures
,
greedy
1900
x4495
723C
Polycarp at the Radio
greedy
1600
x4501
402A
Nuts
greedy
,
math
1100
x4501
1019A
Elections
brute force
,
greedy
1700
x4506
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4517
1536D
Omkar and Medians
data structures
,
greedy
,
implementation
2000
x4545
329A
Purification
constructive algorithms
,
greedy
1500
x4584
540B
School Marks
greedy
,
implementation
1700
x4593
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4603
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4604
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4607
111A
Petya and Inequiations
greedy
1400
x4612
1773E
Easy Assembly
greedy
,
sortings
1400
x4621
1042C
Array Product
constructive algorithms
,
greedy
,
math
1700
x4622
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4627
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4633
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4640
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4646
1898D
Absolute Beauty
greedy
,
math
1900
x4660
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4671
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4672
1657D
For Gamers. By Gamers.
binary search
,
brute force
,
greedy
,
math
,
sortings
2000
x4687
1616D
Keep the Average High
dp
,
greedy
,
math
2000
x4687
92B
Binary Number
greedy
1300
x4687
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x4695
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4696
1172A
Nauuo and Cards
greedy
,
implementation
1800
x4699
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4700
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4704
1821D
Black Cells
binary search
,
brute force
,
greedy
,
math
1900
x4718
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4728
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4736
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4751
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4761
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x4770
1249D1
Too Many Segments (easy version)
greedy
1800
x4796
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4798
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4810
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4835
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4841
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4844
1070D
Garbage Disposal
greedy
1300
x4846
1148D
Dirty Deeds Done Dirt Cheap
greedy
,
sortings
1800
x4853
←
1
2
...
10
11
12
13
14
...
26
27
→
User lists
Name