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Pinely Round 4 (Div. 1 + Div. 2)
06:05:06
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Difficulty:
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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
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1587
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2241
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5749
1398G
Running Competition
bitmasks
,
fft
,
math
,
number theory
2600
x861
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1122
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2247
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x347
1396D
Rainbow Rectangles
data structures
,
sortings
,
two pointers
3300
x301
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2468
1394E
Boboniu and Banknote Collection
strings
3500
x140
1394D
Boboniu and Jianghu
dp
,
greedy
,
sortings
,
trees
2800
x877
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x961
1394B
Boboniu Walks on Graph
brute force
,
dfs and similar
,
graphs
,
hashing
2300
x1852
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x359
1393E1
Twilight and Ancient Scroll (easier version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x381
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x3844
1392I
Kevin and Grid
fft
,
graphs
,
math
3300
x204
1392H
ZS Shuffles Cards
combinatorics
,
dp
,
math
,
probabilities
3000
x696
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x473
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x2000
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3342
1391E
Pairs of Pairs
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2600
x1554
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x5065
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x390
1389F
Bicolored Segments
data structures
,
dp
,
graph matchings
,
sortings
2600
x961
1389E
Calendar Ambiguity
math
,
number theory
2200
x3246
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4116
1388E
Uncle Bogdan and Projections
data structures
,
geometry
,
sortings
2700
x450
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6232
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x127
1387B2
Village (Maximum)
*special problem
,
dfs and similar
,
trees
2500
x868
1387B1
Village (Minimum)
*special problem
,
dp
,
greedy
,
trees
2100
x1382
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x694
1386C
Joker
*special problem
,
bitmasks
,
data structures
,
divide and conquer
,
dsu
2800
x462
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x121
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x257
1385G
Columns Swaps
2-sat
,
dfs and similar
,
dsu
,
graphs
,
implementation
2300
x1440
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2400
1385E
Directing Edges
constructive algorithms
,
dfs and similar
,
graphs
2000
x7173
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2478
1383F
Special Edges
flows
,
graphs
3200
x346
1383E
Strange Operation
combinatorics
,
data structures
,
dp
2800
x767
1383D
Rearrange
brute force
,
constructive algorithms
,
graphs
,
greedy
,
sortings
2800
x674
1383C
String Transformation 2
bitmasks
,
dp
,
graphs
,
trees
3100
x567
1381E
Origami
geometry
,
math
,
sortings
3300
x160
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x519
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1471
1380G
Circular Dungeon
greedy
,
math
,
probabilities
2600
x778
1380F
Strange Addition
data structures
,
dp
,
matrices
2600
x775
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x2090
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4660
1379F2
Chess Strikes Back (hard version)
data structures
,
divide and conquer
2800
x478
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x583
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x423
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1067
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5475
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x264
1375H
Set Merging
constructive algorithms
,
divide and conquer
3300
x414
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1889
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x2133
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x3001
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1285
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x917
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x782
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1639
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2716
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x437
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1117
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5332
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x587
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2320
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1460
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1578
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4839
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9485
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x640
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2153
1368H2
Breadboard Capacity (hard version)
3500
x223
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x344
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x590
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1027
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2186
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1635
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3207
1366G
Construct the String
data structures
,
dp
,
strings
2700
x538
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x793
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4204
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x10319
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1127
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4397
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1405
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4292
1363F
Rotating Substrings
dp
,
strings
2600
x1473
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6741
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4045
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x151
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x667
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x312
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1607
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4516
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