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Pinely Round 4 (Div. 1 + Div. 2)
14:18:09
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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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Status
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Custom test
Problems
#
Name
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x17039
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x11019
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17961
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x11203
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x25280
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14541
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x11135
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x15210
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13836
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6586
1393C
Pinkie Pie Eats Patty-cakes
constructive algorithms
,
greedy
,
math
,
sortings
1700
x10395
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16451
1392D
Omkar and Bed Wars
dp
,
greedy
1700
x8631
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14783
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18680
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x16268
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9496
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18890
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10379
1381B
Unmerge
dp
1800
x8666
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12973
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x20400
1380B
Universal Solution
greedy
1400
x14458
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12572
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11718
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20901
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13877
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x23163
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x15427
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17654
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x12910
1370C
Number Game
games
,
math
,
number theory
1400
x24213
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19418
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11603
1368C
Even Picture
constructive algorithms
1500
x13257
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19477
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8263
1366C
Palindromic Paths
greedy
,
math
1500
x13466
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16870
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x22851
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13014
1363C
Game On Leaves
games
,
trees
1600
x18383
1363B
Subsequence Hate
implementation
,
strings
1400
x23350
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x17893
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8372
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12224
1359C
Mixing Water
binary search
,
math
1700
x13645
1358C
Celex Update
math
1600
x17221
1355D
Game With Array
constructive algorithms
,
math
1400
x17869
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10544
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15588
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x17857
1352G
Special Permutation
constructive algorithms
1600
x20706
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16813
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20078
1351C
Skier
data structures
,
implementation
1400
x8482
1350B
Orac and Models
dp
,
math
,
number theory
1400
x21485
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x16642
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14510
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25057
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x375
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x486
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x589
1346B
Boot Camp
*special problem
,
greedy
1400
x1188
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15541
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12524
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13931
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7807
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13378
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8371
1338A
Powered Addition
greedy
,
math
1500
x23455
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11290
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20008
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8259
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10748
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7238
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16448
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12483
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8136
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16274
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17464
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x13965
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6602
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9034
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x12976
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8832
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13328
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x10000
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x11981
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11931
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x13410
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9644
1324E
Sleeping Schedule
dp
,
implementation
1700
x13144
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x27637
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8839
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9761
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5971
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x16000
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x7236
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11208
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