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)
21:43:10
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
1989F
Simultaneous Coloring
dfs and similar
,
divide and conquer
,
graphs
3000
x320
1988F
Heartbeat
combinatorics
,
dp
,
fft
,
math
3000
x107
1987G1
Spinning Round (Easy Version)
divide and conquer
,
dp
,
trees
2900
x201
1983G
Your Loss
bitmasks
,
brute force
,
dp
,
trees
3000
x171
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x220
1979F
Kostyanych's Theorem
brute force
,
constructive algorithms
,
graphs
,
interactive
2900
x253
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x478
1975G
Zimpha Fan Club
fft
,
greedy
,
math
,
strings
3000
x204
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x217
1967D
Long Way to be Non-decreasing
binary search
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
,
two pointers
2800
x566
1965D
Missing Subarray Sum
constructive algorithms
2900
x341
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x315
1949K
Make Triangle
constructive algorithms
,
math
2800
x276
1949E
Damage per Second
brute force
,
math
2900
x92
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x408
1943D2
Counting Is Fun (Hard Version)
combinatorics
,
dp
2800
x673
1942G
Bessie and Cards
combinatorics
,
dp
,
math
2800
x415
1938L
XOR Operations
2800
x259
1938I
Symmetric Boundary
2800
x56
1938B
Attraction Score
3000
x172
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x425
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x206
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x230
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x359
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x434
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x786
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x439
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x305
1910J
Two Colors
*special problem
2900
x48
1909G
Pumping Lemma
hashing
,
strings
3000
x373
1906I
Contingency Plan 2
graph matchings
2900
x132
1906G
Grid Game 2
games
,
number theory
2900
x159
1906D
Spaceship Exploration
binary search
,
geometry
2800
x104
1906C
Cursed Game
interactive
3000
x168
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x339
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x149
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x276
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x547
1884E
Hard Design
greedy
,
implementation
,
math
2800
x274
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x495
1874E
Jellyfish and Hack
dp
,
math
3000
x296
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x693
1870F
Lazy Numbers
binary search
,
math
2900
x478
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x258
1866J
Jackets and Packets
dp
2800
x280
1863G
Swaps
combinatorics
,
dp
,
graphs
,
math
2800
x591
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x268
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x390
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x530
1852D
Miriany and Matchstick
constructive algorithms
,
dp
,
greedy
2800
x435
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x322
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x364
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x690
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x393
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x622
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x981
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x309
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x468
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x636
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x740
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x346
1824D
LuoTianyi and the Function
data structures
3000
x474
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x613
1810H
Last Number
combinatorics
,
math
2900
x133
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x560
1809G
Prediction
combinatorics
,
dp
,
math
2800
x433
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x431
1806F2
GCD Master (hard version)
greedy
,
math
,
sortings
2900
x285
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x345
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x440
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x342
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x170
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x379
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x424
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x443
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x309
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x364
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x350
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x104
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x350
1768F
Wonderful Jump
dp
,
greedy
2900
x805
1766F
MCF
flows
2800
x267
1765J
Hero to Zero
graph matchings
,
math
2900
x189
1765I
Infinite Chess
implementation
,
shortest paths
2800
x187
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x509
1764G1
Doremy's Perfect DS Class (Easy Version)
binary search
,
interactive
2900
x563
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x442
1758F
Decent Division
constructive algorithms
,
data structures
3000
x162
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x491
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x328
1747E
List Generation
combinatorics
,
dp
,
math
2900
x491
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1631
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x250
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x418
1735F
Pebbles and Beads
data structures
,
geometry
2900
x219
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x422
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x193
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x119
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x385
←
1
2
3
...
5
6
→
User lists
Name