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Codeforces Round 940 (Div. 2) and CodeCraft-23
43:59:43
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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
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x15484
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x13791
1945D
Seraphim the Owl
dp
,
greedy
1300
x11501
1943A
MEX Game 1
games
,
greedy
1300
x14615
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9033
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12754
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15479
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17919
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13206
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16631
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18132
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13443
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12072
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10285
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13728
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12043
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x11880
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14151
1881D
Divide and Equalize
math
,
number theory
1300
x14146
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x14721
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13627
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10656
1868A
Fill in the Matrix
constructive algorithms
,
implementation
1300
x11080
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10475
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12509
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x15882
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x17519
1851D
Prefix Permutation Sums
implementation
,
math
1300
x14248
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x16929
1846E1
Rudolf and Snowflakes (simple version)
brute force
,
implementation
,
math
1300
x15201
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14728
1839C
Insert Zero and Invert Prefix
constructive algorithms
1300
x11307
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x15997
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12703
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11605
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13508
1819A
Constructive Problem
brute force
,
greedy
1300
x12001
1815A
Ian and Array Sorting
greedy
,
math
1300
x13364
1810C
Make It Permutation
brute force
,
greedy
,
sortings
1300
x13706
1807E
Interview
binary search
,
implementation
,
interactive
1300
x11724
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12336
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x16364
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8572
1778B
The Forbidden Permutation
greedy
,
math
1300
x12856
1776H
Beppa and SwerChat
two pointers
1300
x5974
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x12297
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x11500
1769C2
Подкрутка II
*special problem
,
dp
1300
x907
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13501
1766C
Hamiltonian Wall
dp
,
implementation
1300
x12997
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14219
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12294
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14366
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9150
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14429
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15018
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11833
1717C
Madoka and Formal Statement
greedy
1300
x14187
1711B
Party
brute force
,
graphs
1300
x13077
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x17980
1698C
3SUM Closure
brute force
,
data structures
1300
x17823
1693A
Directional Increase
greedy
1300
x15588
1692F
3SUM
brute force
,
math
1300
x21075
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14027
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15701
1675D
Vertical Paths
graphs
,
implementation
,
trees
1300
x12502
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x15978
1667A
Make it Increasing
brute force
,
greedy
,
math
1300
x14308
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16901
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18667
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10582
1650D
Twist the Permutation
brute force
,
constructive algorithms
,
implementation
,
math
1300
x12636
1649B
Game of Ball Passing
greedy
,
implementation
1300
x12747
1647C
Madoka and Childish Pranks
constructive algorithms
,
greedy
1300
x12332
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14325
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16228
1618D
Array and Operations
dp
,
greedy
,
math
1300
x18204
1617C
Paprika and Permutation
binary search
,
greedy
,
math
,
sortings
1300
x14417
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x15124
1612C
Chat Ban
binary search
,
math
1300
x15687
1607D
Blue-Red Permutation
greedy
,
math
,
sortings
1300
x16341
1603A
Di-visible Confusion
constructive algorithms
,
math
,
number theory
1300
x16070
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x13062
1594E1
Rubik's Cube Coloring (easy version)
combinatorics
,
math
1300
x10830
1585C
Minimize Distance
greedy
1300
x11471
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x16452
1571B
Epic Novel
*special problem
,
math
1300
x673
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x13405
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x17591
1558A
Charmed by the Game
brute force
,
math
1300
x10909
1556B
Take Your Places!
implementation
1300
x12404
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x20765
1555B
Two Tables
brute force
1300
x15587
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13780
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x15905
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26812
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12462
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20671
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x15996
1493B
Planet Lapituletti
brute force
,
implementation
1300
x11603
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