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)
10:02:39
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
1572F
Stations
data structures
3400
x253
1572E
Polygon
binary search
,
dp
,
geometry
3000
x283
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x488
1572C
Paint
dp
,
greedy
2700
x1418
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1779
1571J
Two Railroads
*special problem
3000
x40
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x58
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x48
1571G
A Battle Against a Dragon
*special problem
,
data structures
,
dp
2500
x75
1571F
Kotlinforces
*special problem
,
constructive algorithms
,
dp
2000
x181
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x234
1569E
Playoff Restoration
bitmasks
,
brute force
,
hashing
,
implementation
,
meet-in-the-middle
2600
x792
1567F
One-Four Overload
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
2700
x736
1567E
Non-Decreasing Dilemma
data structures
,
divide and conquer
,
math
2200
x3577
1567D
Expression Evaluation Error
constructive algorithms
,
greedy
,
implementation
,
math
2000
x4458
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x129
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x339
1566F
Points Movement
data structures
,
dp
,
greedy
,
implementation
,
sortings
2600
x942
1566E
Buds Re-hanging
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x4072
1562F
Tubular Bells
interactive
,
math
,
number theory
,
probabilities
2900
x388
1562E
Rescue Niwen!
dp
,
greedy
,
string suffix structures
,
strings
2500
x1380
1562D2
Two Hundred Twenty One (hard version)
data structures
,
math
2200
x2096
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4278
1559E
Mocha and Stars
combinatorics
,
dp
,
fft
,
math
,
number theory
2200
x2263
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2590
1558F
Strange Sort
data structures
,
sortings
3300
x373
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x461
1558D
Top-Notch Insertions
combinatorics
,
data structures
2600
x943
1558C
Bottom-Tier Reversals
constructive algorithms
,
greedy
2000
x3211
1557E
Assiut Chess
brute force
,
constructive algorithms
,
interactive
2800
x707
1557D
Ezzat and Grid
data structures
,
dp
,
greedy
2200
x2508
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x362
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x315
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x1197
1556E
Equilibrium
data structures
,
dp
,
greedy
2200
x2660
1555F
Good Graph
data structures
,
dsu
,
graphs
,
trees
2700
x836
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3961
1554E
You
dfs and similar
,
dp
,
math
,
number theory
2600
x1201
1553I
Stairs
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x199
1553H
XOR and Distance
bitmasks
,
divide and conquer
,
trees
2900
x680
1553G
Common Divisor Graph
brute force
,
constructive algorithms
,
dsu
,
graphs
,
hashing
,
math
,
number theory
2700
x993
1553F
Pairwise Modulo
data structures
,
math
2300
x2187
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3279
1552I
Organizing a Music Festival
dfs and similar
,
math
3400
x124
1552H
Guess the Perimeter
binary search
,
interactive
,
number theory
3300
x386
1552G
A Serious Referee
bitmasks
,
brute force
,
dfs and similar
,
sortings
3000
x521
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2850
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1811
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1799
1551E
Fixed Points
binary search
,
brute force
,
dp
2000
x3804
1551D2
Domino (hard version)
constructive algorithms
,
implementation
,
math
2100
x2707
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x651
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1485
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1820
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x396
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x240
1548D1
Gregor and the Odd Cows (Easy)
bitmasks
,
geometry
,
math
,
number theory
2300
x1440
1548C
The Three Little Pigs
combinatorics
,
dp
,
fft
,
math
2500
x1789
1547G
How Many Paths?
dfs and similar
,
dp
,
graphs
,
trees
2100
x2941
1545F
AquaMoon and Potatoes
brute force
,
data structures
,
dp
3500
x106
1545E2
AquaMoon and Time Stop (hard version)
data structures
,
dp
3500
x81
1545E1
AquaMoon and Time Stop (easy version)
data structures
,
dp
3500
x77
1545D
AquaMoon and Wrong Coordinate
constructive algorithms
,
interactive
,
math
3000
x473
1545C
AquaMoon and Permutations
2-sat
,
brute force
,
combinatorics
,
constructive algorithms
,
graph matchings
,
graphs
2800
x597
1543E
The Final Pursuit
bitmasks
,
constructive algorithms
,
divide and conquer
,
graphs
,
greedy
,
math
2700
x397
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x1965
1542E2
Abnormal Permutation Pairs (hard version)
combinatorics
,
dp
,
fft
,
math
2700
x829
1542E1
Abnormal Permutation Pairs (easy version)
combinatorics
,
dp
,
fft
,
math
2400
x1213
1542D
Priority Queue
combinatorics
,
dp
,
implementation
,
math
,
ternary search
2200
x2579
1540E
Tasty Dishes
math
,
matrices
3500
x102
1540D
Inverse Inversions
binary search
,
brute force
,
data structures
3200
x269
1540C2
Converging Array (Hard Version)
dp
,
math
2900
x446
1540C1
Converging Array (Easy Version)
dp
,
math
2700
x606
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2531
1539F
Strange Array
data structures
,
greedy
,
sortings
2600
x849
1539E
Game with Cards
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2500
x935
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4459
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2851
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2418
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x5105
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x926
1536E
Omkar and Forest
combinatorics
,
graphs
,
math
,
shortest paths
2300
x2371
1536D
Omkar and Medians
data structures
,
greedy
,
implementation
2000
x4622
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x446
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2678
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x147
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x547
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x529
1534F1
Falling Sand (Easy Version)
dfs and similar
,
graphs
,
greedy
2500
x1211
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1885
1530H
Turing's Award
data structures
,
dp
3400
x151
1530G
What a Reversal
constructive algorithms
3300
x143
1530F
Bingo
bitmasks
,
combinatorics
,
dp
,
math
,
probabilities
2600
x765
1530E
Minimax
constructive algorithms
,
greedy
,
strings
2100
x2935
1528F
AmShZ Farm
combinatorics
,
fft
,
math
3300
x281
1528E
Mashtali and Hagh Trees
combinatorics
,
dp
,
trees
2900
x517
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1415
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2598
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2243
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1869
←
1
2
...
9
10
11
12
13
...
41
42
→
User lists
Name