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Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
26:04:19
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Difficulty:
—
greedy
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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Custom test
Problems
#
Name
1681A
Game with Cards
games
,
greedy
800
x20703
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20708
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20734
1530A
Binary Decimal
greedy
,
math
800
x20740
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20781
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20847
1573A
Countdown
greedy
800
x20909
1834A
Unit Array
greedy
,
math
800
x21028
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21049
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x21090
1604A
Era
greedy
800
x21100
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21205
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21213
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21289
1061A
Coins
greedy
,
implementation
,
math
800
x21291
1708A
Difference Operations
greedy
,
math
800
x21463
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21558
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x21573
1847A
The Man who became a God
greedy
,
sortings
800
x21633
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21640
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x21820
1743B
Permutation Value
constructive algorithms
,
greedy
800
x21906
1749A
Cowardly Rooks
greedy
,
implementation
800
x21950
1879A
Rigged!
greedy
800
x21996
1635A
Min Or Sum
bitmasks
,
greedy
800
x22035
1694A
Creep
greedy
,
implementation
800
x22103
1731A
Joey Takes Money
greedy
,
math
800
x22109
1806A
Walking Master
geometry
,
greedy
,
math
800
x22177
1474A
Puzzle From the Future
greedy
800
x22190
1466B
Last minute enhancements
dp
,
greedy
800
x22355
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22401
1730A
Planets
data structures
,
greedy
,
sortings
800
x22489
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22529
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22537
1657B
XY Sequence
greedy
800
x22561
1754A
Technical Support
greedy
800
x22576
1566A
Median Maximization
binary search
,
greedy
,
math
800
x22706
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22871
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x22945
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x23020
1923A
Moving Chips
greedy
,
implementation
800
x23068
1516A
Tit for Tat
greedy
800
x23122
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23126
1934A
Too Min Too Max
greedy
,
math
800
x23129
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23165
1634A
Reverse and Concatenate
greedy
,
strings
800
x23631
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23632
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x23662
1712A
Wonderful Permutation
greedy
,
implementation
800
x23710
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23729
1778A
Flip Flop Sum
greedy
,
implementation
800
x23736
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23846
1451A
Subtract or Divide
greedy
,
math
800
x23905
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24028
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24046
1945A
Setting up Camp
greedy
,
math
800
x24103
1882A
Increasing Sequence
greedy
800
x24187
1747A
Two Groups
constructive algorithms
,
greedy
800
x24316
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24331
1041A
Heist
greedy
,
implementation
,
sortings
800
x24451
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24527
1690B
Array Decrements
greedy
,
implementation
800
x24593
1481A
Space Navigation
greedy
,
strings
800
x24636
1705A
Mark the Photographer
greedy
,
sortings
800
x24791
1901A
Line Trip
greedy
,
math
800
x24824
1517A
Sum of 2050
greedy
,
math
800
x25078
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25171
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25296
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25358
1697A
Parkway Walk
greedy
,
implementation
800
x25381
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25404
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25465
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x25690
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25939
1391B
Fix You
brute force
,
greedy
,
implementation
800
x25994
1744A
Number Replacement
greedy
,
implementation
800
x26289
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26342
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26376
1721A
Image
greedy
,
implementation
800
x26570
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26613
1702B
Polycarp Writes a String from Memory
greedy
800
x26865
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x26987
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27032
1792A
GamingForces
greedy
,
sortings
800
x27091
1855A
Dalton the Teacher
greedy
,
math
800
x27095
1511A
Review Site
greedy
800
x27135
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27141
1633B
Minority
greedy
800
x27187
1550A
Find The Array
greedy
,
math
800
x27609
1853A
Desorting
brute force
,
greedy
,
math
800
x27775
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27923
1843B
Long Long
greedy
,
math
,
two pointers
800
x27949
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x27955
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27983
1397A
Juggling Letters
greedy
,
strings
800
x28094
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28493
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28525
1554A
Cherry
greedy
800
x28554
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x28610
1631A
Min Max Swap
greedy
800
x28616
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