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Pinely Round 4 (Div. 1 + Div. 2)
14:03:37
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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
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6549
1607E
Robot on the Board 1
implementation
1600
x9204
1606C
Banknotes
greedy
,
number theory
1400
x13981
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x16654
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13312
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x3842
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8516
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7308
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x12068
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7802
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5319
1583C
Omkar and Determination
data structures
,
dp
1700
x6870
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5435
1582D
Vupsen, Pupsen and 0
constructive algorithms
,
math
1600
x10336
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3610
1579F
Array Stabilization (AND version)
brute force
,
graphs
,
math
,
number theory
,
shortest paths
1700
x4686
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6545
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15726
1579C
Ticks
greedy
,
implementation
1500
x10446
1578H
Higher Order Functions
implementation
,
strings
1700
x2003
1575J
Jeopardy of Dropped Balls
binary search
,
brute force
,
dsu
,
implementation
1500
x3711
1575D
Divisible by Twenty-Five
brute force
,
dfs and similar
,
dp
1800
x2453
1573B
Swaps
greedy
,
math
,
sortings
1400
x14354
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8772
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x334
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x328
1571C
Rhyme
*special problem
,
implementation
1800
x373
1569C
Jury Meeting
combinatorics
,
math
1500
x11857
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x12025
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7783
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6251
1562C
Rings
constructive algorithms
,
math
1500
x13097
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5536
1560E
Polycarp and String Transformation
binary search
,
implementation
,
sortings
,
strings
1800
x7858
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13546
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8481
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x6745
1556C
Compressed Bracket Sequence
brute force
,
implementation
1800
x5725
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x12104
1554D
Diane
constructive algorithms
,
greedy
,
strings
1800
x9258
1554C
Mikasa
binary search
,
bitmasks
,
greedy
,
implementation
1800
x8723
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12615
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13532
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6878
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5848
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x15235
1551D1
Domino (easy version)
constructive algorithms
,
math
1700
x6979
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x13093
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x15293
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x10065
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9591
1548A
Web of Lies
brute force
,
graphs
,
greedy
1400
x16257
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x14190
1545A
AquaMoon and Strange Sort
sortings
1500
x13765
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7515
1542C
Strange Function
math
,
number theory
1600
x13929
1542B
Plus and Multiply
constructive algorithms
,
math
,
number theory
1500
x22660
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13817
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11481
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x18882
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x13357
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12658
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x12156
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13868
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7602
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16304
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5925
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x9076
1528B
Kavi on Pairing Duty
combinatorics
,
dp
,
math
1700
x8592
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x14331
1527C
Sequence Pair Weight
hashing
,
implementation
,
math
1600
x13323
1526C2
Potions (Hard Version)
data structures
,
greedy
1600
x21912
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21877
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x29752
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x9555
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8673
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x11282
1520E
Arranging The Sheep
greedy
,
math
1400
x20761
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14922
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16476
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7529
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13224
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11742
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18810
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11275
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16848
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14738
1513C
Add One
dp
,
matrices
1600
x13596
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x14274
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x8006
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x10255
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11267
1509C
The Sports Festival
dp
,
greedy
1800
x12172
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3907
1506E
Restoring the Permutation
constructive algorithms
,
implementation
1500
x12837
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x21299
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1741
1505D
Xenolith? Hippodrome?
*special problem
,
number theory
1800
x756
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6341
1505B
DMCA
*special problem
,
implementation
,
number theory
1600
x6062
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