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Pinely Round 4 (Div. 1 + Div. 2)
38:07:26
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Difficulty:
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hashing
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
1081H
Palindromic Magic
data structures
,
hashing
,
strings
3500
x102
1621I
Two Sequences
data structures
,
hashing
,
string suffix structures
3500
x113
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x152
1043G
Speckled Band
data structures
,
divide and conquer
,
hashing
,
string suffix structures
,
strings
3500
x223
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x140
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x432
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x497
1598G
The Sum of Good Numbers
hashing
,
math
,
string suffix structures
,
strings
3200
x328
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x359
613E
Puzzle Lover
dp
,
hashing
,
strings
3200
x457
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x559
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x217
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x234
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x250
1909G
Pumping Lemma
hashing
,
strings
3000
x373
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x408
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x440
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x446
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x891
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x392
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x529
1622F
Quadratic Set
constructive algorithms
,
hashing
,
math
,
number theory
2900
x610
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x304
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x358
1393E1
Twilight and Ancient Scroll (easier version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x381
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x526
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x617
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x634
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x710
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x1091
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1630
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x81
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x127
1599F
Mars
hashing
2700
x311
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x364
1867F
Most Different Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
hashing
2700
x409
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x525
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x530
407D
Largest Submatrix 3
dp
,
hashing
2700
x556
961F
k-substrings
binary search
,
hashing
,
string suffix structures
2700
x706
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x780
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x990
1553G
Common Divisor Graph
brute force
,
constructive algorithms
,
dsu
,
graphs
,
hashing
,
math
,
number theory
2700
x992
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1071
452F
Permutation
data structures
,
divide and conquer
,
hashing
2700
x1422
1634F
Fibonacci Additions
brute force
,
data structures
,
hashing
,
implementation
,
math
2700
x1576
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x417
1906B
Button Pressing
bitmasks
,
constructive algorithms
,
hashing
2600
x487
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x502
1569E
Playoff Restoration
bitmasks
,
brute force
,
hashing
,
implementation
,
meet-in-the-middle
2600
x792
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x896
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x916
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1169
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1254
1223F
Stack Exterminable Arrays
data structures
,
divide and conquer
,
dp
,
hashing
2600
x1999
119D
String Transformation
hashing
,
strings
2500
x483
444D
DZY Loves Strings
binary search
,
hashing
,
strings
,
two pointers
2500
x760
607C
Marbles
hashing
,
strings
2500
x784
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x868
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x872
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1032
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x1043
1320D
Reachable Strings
data structures
,
hashing
,
strings
2500
x1424
1418G
Three Occurrences
data structures
,
divide and conquer
,
hashing
,
two pointers
2500
x1547
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1676
963D
Frequency of String
hashing
,
string suffix structures
,
strings
2500
x1888
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x2003
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x260
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x320
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x345
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x460
1045B
Space Isaac
hashing
,
number theory
2400
x507
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x601
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x683
1166F
Vicky's Delivery Service
data structures
,
dsu
,
graphs
,
hashing
2400
x691
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x802
794D
Labelling Cities
dfs and similar
,
graphs
,
hashing
2400
x802
1182D
Complete Mirror
constructive algorithms
,
dfs and similar
,
dp
,
hashing
,
implementation
,
trees
2400
x820
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x875
1252F
Regular Forestation
hashing
,
trees
2400
x909
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x911
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x1010
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1050
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1102
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1391
869E
The Untended Antiquity
data structures
,
hashing
2400
x1571
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1583
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1660
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1680
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1764
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1786
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1935
1257F
Make Them Similar
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
2400
x1982
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x329
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x487
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1163
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1178
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1275
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1423
1977D
XORificator
bitmasks
,
brute force
,
greedy
,
hashing
2300
x1627
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