Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Pinely Round 4 (Div. 1 + Div. 2)
09:54:43
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
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x236
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x909
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1574
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1447
913H
Don't Exceed
math
,
probabilities
3400
x124
913G
Power Substring
math
,
number theory
3200
x198
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x634
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x762
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1527
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x514
911G
Mass Change Queries
data structures
2500
x2753
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1616
909F
AND-permutations
constructive algorithms
2500
x522
908H
New Year and Boolean Bridges
3100
x376
908G
New Year and Original Order
dp
,
math
2800
x1328
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1385
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x752
906E
Reverses
dp
,
string suffix structures
,
strings
3300
x437
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x2040
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1281
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x520
901E
Cyclic Cipher
fft
,
math
3300
x85
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x438
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x2083
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x523
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3280
891E
Lust
combinatorics
,
math
,
matrices
3000
x898
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x180
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x521
888F
Connecting Vertices
dp
,
graphs
2500
x776
887F
Row of Models
greedy
,
sortings
2500
x163
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x163
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x474
886F
Symmetric Projections
geometry
2900
x266
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x993
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x1034
884E
Binary Matrix
dsu
2500
x678
883L
Berland.Taxi
data structures
2500
x230
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x575
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x366
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x342
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x499
878D
Magic Breeding
bitmasks
2900
x645
878C
Tournament
data structures
,
graphs
2700
x902
875F
Royal Questions
dsu
,
graphs
,
greedy
2500
x1295
875E
Delivery Club
binary search
,
data structures
,
dp
2600
x868
873F
Forbidden Indices
dsu
,
string suffix structures
,
strings
2400
x1325
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x148
870F
Paths
data structures
,
number theory
2700
x608
869E
The Untended Antiquity
data structures
,
hashing
2400
x1592
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x240
868G
El Toll Caves
math
3300
x130
868F
Yet Another Minimization Problem
divide and conquer
,
dp
2500
x3623
868E
Policeman and a Tree
dp
,
graphs
,
trees
2700
x484
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x135
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x68
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x120
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x5129
865C
Gotta Go Fast
binary search
,
dp
2400
x819
864F
Cities Excursions
dfs and similar
,
graphs
,
trees
2700
x582
863G
Graphic Settings
3200
x55
862F
Mahmoud and Ehab and the final stage
data structures
,
strings
2900
x199
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x429
859G
Circle of Numbers
math
3000
x155
859F
Ordering T-Shirts
greedy
2800
x180
856F
To Play or not to Play
greedy
3000
x104
856E
Satellites
3100
x68
856D
Masha and Cactus
dp
,
trees
2400
x379
856C
Eleventh Birthday
combinatorics
,
dp
,
math
2400
x565
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x205
855F
Nagini
binary search
,
data structures
3100
x435
855D
Rowena Ravenclaw's Diadem
trees
2500
x479
853E
Lada Malina
data structures
,
geometry
3400
x65
853D
Michael and Charging Stations
binary search
,
dp
,
greedy
2400
x658
852H
Bob and stages
dp
,
geometry
3000
x150
852A
Digits
brute force
,
implementation
,
math
2500
x385
850F
Rainbow Balls
math
2800
x637
850E
Random Elections
bitmasks
,
brute force
,
divide and conquer
,
fft
,
math
2800
x384
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x377
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x203
848D
Shake It!
combinatorics
,
dp
,
flows
,
graphs
2900
x380
848C
Goodbye Souvenir
data structures
,
divide and conquer
2600
x1328
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x320
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x622
845F
Guards In The Storehouse
bitmasks
,
dp
2500
x434
845E
Fire in the City
binary search
,
data structures
2400
x587
843E
Maximum Flow
flows
,
graphs
3000
x308
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x792
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x351
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x406
840E
In a Trap
trees
3200
x446
840D
Destiny
data structures
,
probabilities
2500
x2906
840C
On the Bench
combinatorics
,
dp
2500
x1680
839E
Mother of Dragons
brute force
,
graphs
,
math
,
meet-in-the-middle
2700
x897
838F
Expected Earnings
2800
x95
838D
Airplane Arrangements
math
,
number theory
2700
x844
838C
Future Failure
dp
,
games
2800
x290
837G
Functions On The Segments
data structures
2500
x659
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x887
835F
Roads in the Kingdom
dfs and similar
,
dp
,
graphs
,
trees
2500
x1041
←
1
2
...
15
16
17
18
19
...
25
26
→
User lists
Name