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Refact.ai Match 1 (Codeforces Round 985)
4 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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Status
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Custom test
Problems
#
Name
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x12782
2035A
Sliding
implementation
,
math
800
x13472
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x21825
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x31067
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19341
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x22585
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x17257
2026A
Perpendicular Segments
constructive algorithms
,
geometry
,
greedy
,
math
900
x14788
2025A
Two Screens
binary search
,
greedy
,
strings
,
two pointers
800
x22792
2024A
Profitable Interest Rate
greedy
,
math
800
x18010
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13212
2021A
Meaning Mean
data structures
,
greedy
,
math
,
sortings
800
x18250
2020A
Find Minimum Operations
bitmasks
,
brute force
,
greedy
,
math
,
number theory
800
x21500
2019A
Max Plus Size
brute force
,
dp
,
greedy
800
x22410
2014B
Robin Hood and the Major Oak
math
800
x27747
2014A
Robin Helps
greedy
,
implementation
800
x36204
2013B
Battle for Survive
constructive algorithms
,
greedy
,
math
900
x22545
2013A
Zhan's Blender
constructive algorithms
,
math
800
x26709
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19386
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16399
2009B
osu!mania
brute force
,
implementation
800
x40748
2009A
Minimize!
brute force
,
math
800
x49579
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x29830
2008B
Square or Not
brute force
,
math
,
strings
800
x28150
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x34536
2007B
Index and Maximum Value
data structures
,
greedy
900
x20917
2007A
Dora's Set
greedy
,
math
,
number theory
800
x22455
2005B1
The Strict Teacher (Easy Version)
greedy
,
math
,
sortings
1000
x19561
2005A
Simple Palindrome
combinatorics
,
constructive algorithms
,
greedy
,
math
900
x21391
2004B
Game with Doors
brute force
,
greedy
1000
x25737
2004A
Closest Point
implementation
,
math
800
x30082
2003B
Turtle and Piggy Are Playing a Game 2
games
,
greedy
,
sortings
800
x24930
2003A
Turtle and Good Strings
greedy
,
strings
800
x28675
2002B
Removals Game
constructive algorithms
,
games
1000
x18567
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19270
2001B
Generate Permutation
constructive algorithms
800
x23876
2001A
Make All Equal
greedy
,
implementation
800
x29316
2000C
Numeric String Template
data structures
,
strings
1000
x25104
2000B
Seating in a Bus
two pointers
800
x33484
2000A
Primary Task
implementation
,
math
,
strings
800
x36933
1999C
Showering
greedy
,
implementation
800
x34717
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x31924
1999A
A+B Again?
implementation
,
math
800
x53681
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x23501
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23778
1997A
Strong Password
brute force
,
implementation
,
strings
800
x28713
1996B
Scale
greedy
,
implementation
800
x32354
1996A
Legs
binary search
,
math
,
ternary search
800
x42667
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x24090
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20112
1993A
Question Marks
greedy
,
implementation
800
x29185
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x28929
1992B
Angry Monk
greedy
,
math
,
sortings
800
x34102
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x40939
1991A
Maximize the Last Element
greedy
,
implementation
800
x21672
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x22524
1989A
Catch the Coin
implementation
800
x26265
1988B
Make Majority
greedy
,
implementation
900
x22613
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x23066
1987B
K-Sort
greedy
1000
x20321
1987A
Upload More RAM
greedy
,
math
800
x25238
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x26487
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x40284
1985D
Manhattan Circle
implementation
,
math
900
x34350
1985C
Good Prefixes
greedy
1000
x32186
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x46034
1985A
Creating Words
implementation
,
strings
800
x53319
1984A
Strange Splitting
constructive algorithms
800
x21101
1983A
Array Divisibility
constructive algorithms
,
math
800
x25554
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x25034
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x22224
1980B
Choosing Cubes
sortings
,
sortings
800
x34581
1980A
Problem Generator
math
800
x40481
1979B
XOR Sequences
bitmasks
,
greedy
1000
x22506
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x28965
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x22256
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x25579
1977A
Little Nikita
math
800
x31709
1976A
Verify Password
implementation
,
sortings
,
strings
800
x28494
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x17779
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x18459
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x30170
1974A
Phone Desktop
greedy
,
math
800
x33162
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x24436
1972B
Coin Games
games
900
x21520
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x22893
1971C
Clock and Strings
implementation
900
x32889
1971B
Different String
implementation
,
strings
800
x36803
1971A
My First Sorting Problem
implementation
,
sortings
800
x44965
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x4657
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x19009
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x19925
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x24965
1968B
Prefiquence
greedy
,
two pointers
800
x27854
1968A
Maximize?
brute force
,
math
,
number theory
800
x34476
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x17852
1957A
Stickogon
constructive algorithms
,
greedy
800
x23313
1956B
Nene and the Card Game
games
,
greedy
800
x21229
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x21662
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x27933
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