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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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Custom test
Problems
#
Name
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x16064
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x18564
1788A
One and Two
brute force
,
implementation
,
math
800
x29628
1787A
Exponential Equation
constructive algorithms
,
math
800
x19047
1786A2
Alternating Deck (hard version)
implementation
800
x11350
1786A1
Non-alternating Deck (easy version)
implementation
800
x13752
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x29333
1781A
Parallel Projection
geometry
,
math
800
x15024
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21552
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x23073
1778A
Flip Flop Sum
greedy
,
implementation
800
x24099
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x23627
1776A
Walking Boy
greedy
800
x6912
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19563
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22307
1773F
Football
constructive algorithms
800
x4053
1772B
Matrix Rotation
brute force
,
implementation
800
x28911
1772A
A+B?
implementation
800
x46550
1769A
Узкая дорога
*special problem
,
math
800
x1937
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x28698
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x20209
1767A
Cut the Triangle
implementation
800
x20427
1766A
Extremely Round
brute force
,
implementation
800
x25793
1765B
Broken Keyboard
greedy
800
x8891
1764A
Doremy's Paint
greedy
800
x16536
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15595
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18916
1761A
Two Permutations
brute force
,
constructive algorithms
800
x19025
1760C
Advantage
data structures
,
implementation
,
sortings
800
x36553
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x43797
1760A
Medium Number
implementation
,
sortings
800
x57650
1759B
Lost Permutation
math
800
x22105
1759A
Yes-Yes?
implementation
,
strings
800
x29660
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x25045
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18820
1754A
Technical Support
greedy
800
x23009
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x16184
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17001
1749A
Cowardly Rooks
greedy
,
implementation
800
x22269
1748A
The Ultimate Square
math
800
x23921
1747A
Two Groups
constructive algorithms
,
greedy
800
x24736
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x17060
1746A
Maxmina
constructive algorithms
,
greedy
800
x19749
1744B
Even-Odd Increments
implementation
,
math
800
x23351
1744A
Number Replacement
greedy
,
implementation
800
x26990
1743B
Permutation Value
constructive algorithms
,
greedy
800
x22139
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26602
1742B
Increasing
greedy
,
implementation
,
sortings
800
x46859
1742A
Sum
implementation
800
x69607
1741B
Funny Permutation
constructive algorithms
,
math
800
x25249
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x30547
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13705
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x20003
1739A
Immobile Knight
implementation
800
x22567
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13478
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22690
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20119
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15722
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x21012
1733A
Consecutive Sum
greedy
,
sortings
800
x20835
1731A
Joey Takes Money
greedy
,
math
800
x22412
1730A
Planets
data structures
,
greedy
,
sortings
800
x22899
1729B
Decode String
greedy
,
strings
800
x29955
1729A
Two Elevators
math
800
x40000
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20073
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24546
1725A
Accumulation of Dominoes
math
800
x9193
1722C
Word Game
data structures
,
implementation
800
x30575
1722B
Colourblindness
implementation
800
x45198
1722A
Spell Check
implementation
800
x49513
1721A
Image
greedy
,
implementation
800
x26906
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20993
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18453
1719A
Chip Game
games
,
math
800
x25338
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19353
1716B
Permutation Chain
constructive algorithms
,
math
800
x21349
1716A
2-3 Moves
greedy
,
math
800
x32548
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23416
1714C
Minimum Varied Number
greedy
800
x30823
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x30011
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21883
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21466
1712A
Wonderful Permutation
greedy
,
implementation
800
x23940
1711A
Perfect Permutation
constructive algorithms
800
x25044
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29457
1708A
Difference Operations
greedy
,
math
800
x21687
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22798
1705A
Mark the Photographer
greedy
,
sortings
800
x25090
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x15943
1703C
Cypher
brute force
,
implementation
,
strings
800
x35104
1703B
ICPC Balloons
data structures
,
implementation
800
x48058
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x67288
1702B
Polycarp Writes a String from Memory
greedy
800
x27443
1702A
Round Down the Price
constructive algorithms
800
x34362
1701B
Permutation
greedy
800
x20126
1701A
Grass Field
implementation
800
x26154
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22790
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23909
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x20862
1698A
XOR Mixup
bitmasks
,
brute force
800
x28747
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