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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
16:05:17
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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
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x3522
2038C
DIY
data structures
,
geometry
,
greedy
,
sortings
1400
x3167
2038A
Bonus Project
games
,
greedy
1400
x2691
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x8051
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x9980
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x12727
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x11371
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8780
2020C
Bitwise Balancing
bitmasks
,
hashing
,
implementation
,
math
,
schedules
,
ternary search
1400
x14452
2014D
Robert Hood and Mrs Hood
brute force
,
data structures
,
greedy
,
sortings
1400
x12124
2013C
Password Cracking
constructive algorithms
,
interactive
,
strings
1400
x11663
2010C1
Message Transmission Error (easy version)
brute force
,
strings
1400
x7031
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x13321
2009D
Satyam and Counting
geometry
,
math
1400
x14412
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x12540
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x13318
1993C
Light Switches
implementation
,
math
1400
x13679
1989C
Two Movies
greedy
,
math
1400
x18617
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x15282
1983C
Have Your Cake and Eat It Too
binary search
,
brute force
,
greedy
,
implementation
1400
x12636
1980D
GCD-sequence
greedy
,
implementation
,
math
,
number theory
1400
x14392
1974D
Ingenuity-2
constructive algorithms
,
greedy
,
implementation
1400
x14906
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x15877
1970C1
Game on Tree (Easy)
games
1400
x3538
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
1400
x13393
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x12578
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x13861
1958B
Clock in the Pool
*special problem
,
math
1400
x911
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x15582
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x11763
1932D
Card Game
greedy
,
implementation
1400
x11632
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x15982
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x16266
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x15139
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x14239
1923C
Find B
constructive algorithms
,
greedy
1400
x15377
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x19452
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x14242
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x12639
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x12412
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x11369
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x14642
1905C
Largest Subsequence
greedy
,
strings
1400
x12501
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x13670
1903C
Theofanis' Nightmare
constructive algorithms
,
greedy
1400
x12148
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x12171
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x9811
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x11397
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x12572
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x11400
1883F
You Are So Beautiful
data structures
1400
x9719
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x13224
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x11936
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7852
1863D
Two-Colored Dominoes
constructive algorithms
,
greedy
1400
x9621
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13533
1854A1
Dual (Easy Version)
constructive algorithms
,
math
1400
x14306
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x13035
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x14478
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x12423
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x13943
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x14736
1837D
Bracket Coloring
constructive algorithms
,
greedy
1400
x15168
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x13481
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x13871
1824A
LuoTianyi and the Show
greedy
,
implementation
1400
x11413
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x12711
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x13017
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x15351
1773E
Easy Assembly
greedy
,
sortings
1400
x4976
1772D
Absolute Sorting
constructive algorithms
,
math
1400
x16162
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x14743
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x885
1764C
Doremy's City Construction
graphs
,
greedy
1400
x9485
1762C
Binary Strings are Fun
combinatorics
,
math
1400
x9262
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9673
1759D
Make It Round
brute force
,
number theory
1400
x13921
1758C
Almost All Multiples
greedy
,
number theory
1400
x13786
1750C
Complementary XOR
constructive algorithms
,
implementation
1400
x9631
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x14123
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x15165
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x11138
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9985
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13625
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x16058
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13467
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x13352
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x16937
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x15015
1705C
Mark and His Unfinished Essay
brute force
,
implementation
1400
x13422
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x17381
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14498
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11711
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x18180
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15776
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x12425
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14916
1679C
Rooks Defenders
data structures
,
implementation
1400
x10433
1676H1
Maximum Crossings (Easy Version)
brute force
1400
x14245
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x10038
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