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Pinely Round 4 (Div. 1 + Div. 2)
25:55:19
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Difficulty:
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data structures
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
1996G
Penacony
brute force
,
data structures
,
dp
,
hashing
x248
1995E2
Let Me Teach You a Lesson (Hard Version)
bitmasks
,
data structures
,
dp
,
graphs
,
matrices
,
two pointers
x125
1995E1
Let Me Teach You a Lesson (Easy Version)
data structures
,
dp
,
matrices
,
two pointers
x185
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
x6242
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
x149
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
x606
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
x663
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5021
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1035
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x2797
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x869
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1228
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x20979
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x24366
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
2200
x1288
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x4729
1985F
Final Boss
binary search
,
data structures
1500
x13106
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x963
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x7103
1982F
Sorting Problem Again
binary search
,
data structures
,
sortings
2600
x803
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x6217
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x15286
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x219
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x714
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x1038
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x3344
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x9319
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x1247
1978F
Large Graph
data structures
,
dfs and similar
,
dsu
,
graphs
,
number theory
,
two pointers
2400
x1141
1978E
Computing Machine
brute force
,
data structures
,
dp
,
greedy
,
implementation
2000
x3263
1978D
Elections
data structures
,
greedy
,
implementation
,
math
1600
x9805
1978C
Manhattan Permutations
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1300
x13282
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x6040
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x477
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
2500
x887
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
2000
x3689
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x2017
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3794
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x3233
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x14521
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x12907
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x8305
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1209
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x4087
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1743
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x3858
1968F
Equal XOR Segments
binary search
,
data structures
1800
x4931
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x54
1967C
Fenwick Tree
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
math
,
trees
2300
x1530
1965F
Conference
data structures
,
flows
3300
x139
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x364
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x417
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x315
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x20697
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x14382
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x26294
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x2047
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x721
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x13714
1946F
Nobody is needed
2-sat
,
data structures
,
dfs and similar
,
dp
2500
x854
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x581
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x699
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3927
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x83
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x654
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2643
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8988
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x127
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x35
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x466
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1210
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2656
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x425
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1281
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7732
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3796
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x14897
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x323
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6751
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1711
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x230
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x4016
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1580
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x4126
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x19928
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x11154
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2404
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3502
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x6359
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5458
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1188
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3650
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20908
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x434
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x919
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x786
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x2099
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3718
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x17909
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4530
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