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Codeforces Round 968 (Div. 2)
2 days
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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
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Status
Standings
Custom test
Problems
#
Name
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20337
1895A
Treasure Chest
math
800
x24202
1894A
Secret Sport
implementation
,
strings
800
x18769
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x19077
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17354
1890A
Doremy's Paint 3
constructive algorithms
800
x25319
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x25513
1884A
Simple Design
brute force
,
greedy
,
math
800
x17256
1883A
Morning
math
800
x25269
1882A
Increasing Sequence
greedy
800
x25113
1881A
Don't Try to Count
brute force
,
strings
800
x30665
1879A
Rigged!
greedy
800
x22971
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31115
1878A
How Much Does Daytona Cost?
greedy
800
x42815
1877A
Goals of Victory
math
800
x22065
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x34488
1873C
Target Practice
implementation
,
math
800
x39084
1873B
Good Kid
brute force
,
greedy
,
math
800
x47438
1873A
Short Sort
brute force
,
implementation
800
x52514
1872A
Two Vessels
brute force
,
greedy
,
math
800
x38601
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x18917
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19779
1866A
Ambitious Kid
math
800
x20877
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20159
1863A
Channel
greedy
,
implementation
800
x17848
1862B
Sequence Game
constructive algorithms
800
x31253
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x32111
1861A
Prime Deletion
constructive algorithms
,
math
800
x23689
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x31531
1858A
Buttons
games
,
greedy
,
math
800
x37240
1857A
Array Coloring
greedy
,
math
800
x46800
1856A
Tales of a Sort
implementation
800
x26326
1855A
Dalton the Teacher
greedy
,
math
800
x27741
1853A
Desorting
brute force
,
greedy
,
math
800
x30888
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x29010
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29333
1850C
Word on the Paper
implementation
,
strings
800
x43372
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x42243
1850A
To My Critics
implementation
,
sortings
800
x54506
1849A
Morning Sandwich
implementation
,
math
800
x27696
1847A
The Man who became a God
greedy
,
sortings
800
x21931
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26698
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x32253
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x26590
1844A
Subtraction Game
constructive algorithms
,
games
800
x24413
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x32518
1843B
Long Long
greedy
,
math
,
two pointers
800
x28759
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x33904
1842A
Tenzing and Tsondu
games
,
math
800
x19703
1841A
Game with Board
constructive algorithms
,
games
800
x24593
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x33684
1839A
The Good Array
greedy
,
implementation
,
math
800
x17354
1838A
Blackboard List
constructive algorithms
,
math
800
x21393
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x31507
1836A
Destroyer
implementation
,
sortings
800
x20158
1834A
Unit Array
greedy
,
math
800
x23581
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25957
1833A
Musical Puzzle
implementation
,
strings
800
x32360
1832A
New Palindrome
strings
800
x25420
1831A
Twin Permutations
constructive algorithms
800
x26151
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x28192
1829B
Blank Space
implementation
800
x44395
1829A
Love Story
implementation
,
strings
800
x49432
1828A
Divisible Array
constructive algorithms
,
math
800
x23487
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19547
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16050
1822C
Bun Lover
math
800
x22778
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24600
1822A
TubeTube Feed
brute force
,
implementation
800
x24108
1821A
Matching
combinatorics
,
math
800
x19682
1820A
Yura's New Name
implementation
,
strings
800
x16583
1818A
Politics
greedy
,
implementation
800
x12863
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x17484
1814A
Coins
implementation
,
math
800
x27798
1811A
Insert Digit
greedy
,
math
,
strings
800
x30811
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17388
1810A
Beautiful Sequence
brute force
,
greedy
800
x20631
1809A
Garland
implementation
800
x23758
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x30069
1807B
Grab the Candies
greedy
800
x41271
1807A
Plus or Minus
implementation
800
x59879
1806A
Walking Master
geometry
,
greedy
,
math
800
x24029
1805B
The String Has a Target
greedy
,
strings
800
x18456
1805A
We Need the Zero
bitmasks
,
brute force
800
x22748
1804A
Lame King
greedy
,
math
800
x17864
1802A
Likes
greedy
,
implementation
800
x15687
1800A
Is It a Cat?
implementation
,
strings
800
x31060
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11512
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19588
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x17298
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18760
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23507
1794A
Prefix and Suffix Array
strings
800
x17017
1793A
Yet Another Promotion
greedy
,
math
800
x17937
1792A
GamingForces
greedy
,
sortings
800
x27914
1791C
Prepend and Append
implementation
,
two pointers
800
x43998
1791B
Following Directions
geometry
,
implementation
800
x43523
1791A
Codeforces Checking
implementation
,
strings
800
x58897
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x27181
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x36644
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