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Pinely Round 4 (Div. 1 + Div. 2)
33:58:34
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Difficulty:
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two pointers
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
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Problems
#
Name
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1238
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1236
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1235
1252E
Songwriter
greedy
,
two pointers
2200
x1228
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1220
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1215
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1191
1437F
Emotional Fishermen
combinatorics
,
dp
,
math
,
two pointers
2600
x1189
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1160
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1158
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1155
1978F
Large Graph
data structures
,
dfs and similar
,
dsu
,
graphs
,
number theory
,
two pointers
2400
x1139
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1131
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1122
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1118
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1110
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1075
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1071
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1067
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x1017
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x1006
1503D
Flip the Cards
2-sat
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
2600
x988
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x981
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x963
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x961
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x960
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x955
1400G
Mercenaries
bitmasks
,
brute force
,
combinatorics
,
dp
,
dsu
,
math
,
two pointers
2600
x948
524D
Social Network
greedy
,
two pointers
2100
x948
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x928
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x927
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x917
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x892
1684F
Diverse Segments
data structures
,
two pointers
2600
x885
1493E
Enormous XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
,
strings
,
two pointers
2600
x883
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x883
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x882
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x862
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x849
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x849
1876D
Lexichromatography
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2500
x842
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x829
253D
Table with Letters - 2
brute force
,
two pointers
2000
x826
1500C
Matrix Sorting
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
two pointers
2600
x787
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x761
444D
DZY Loves Strings
binary search
,
hashing
,
strings
,
two pointers
2500
x760
1609F
Interesting Sections
data structures
,
divide and conquer
,
meet-in-the-middle
,
two pointers
2800
x745
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x732
76B
Mice
greedy
,
two pointers
2100
x725
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x721
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x717
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x716
309B
Context Advertising
dp
,
two pointers
2100
x707
55E
Very simple problem
geometry
,
two pointers
2500
x688
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x678
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x677
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x676
682E
Alyona and Triangles
geometry
,
two pointers
2600
x661
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x660
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x639
131F
Present to Mom
binary search
,
two pointers
2000
x636
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x612
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x595
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x593
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x581
1967D
Long Way to be Non-decreasing
binary search
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
,
two pointers
2800
x566
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x566
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x559
627E
Orchestra
two pointers
3000
x547
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x539
163C
Conveyor
sortings
,
two pointers
2100
x538
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x530
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x518
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x509
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x504
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x489
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x480
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x474
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x466
309A
Morning run
binary search
,
math
,
two pointers
2000
x461
164B
Ancient Berland Hieroglyphs
two pointers
2000
x451
1500D
Tiles for Bathroom
data structures
,
sortings
,
two pointers
2900
x450
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x448
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x447
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x440
611G
New Year and Cake
geometry
,
two pointers
2900
x431
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x421
264D
Colorful Stones
dp
,
two pointers
2500
x412
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x408
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x391
43E
Race
brute force
,
implementation
,
two pointers
2300
x388
1418F
Equal Product
data structures
,
math
,
number theory
,
two pointers
3000
x362
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x359
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
2600
x356
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x349
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x337
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x315
78D
Archer's Shot
binary search
,
geometry
,
math
,
two pointers
2300
x307
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x303
1396D
Rainbow Rectangles
data structures
,
sortings
,
two pointers
3300
x301
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