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Codeforces Round (Div. 2)
2 days
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Difficulty:
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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
Submit
Status
Standings
Custom test
Problems
#
Name
1992B
Angry Monk
greedy
,
math
,
sortings
800
x28318
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x33230
1989A
Catch the Coin
implementation
800
x23109
1987A
Upload More RAM
greedy
,
math
800
x22006
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x35738
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x40016
1985A
Creating Words
implementation
,
strings
800
x44754
1984A
Strange Splitting
constructive algorithms
800
x19474
1983A
Array Divisibility
constructive algorithms
,
math
800
x23095
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x22723
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x20560
1980B
Choosing Cubes
sortings
,
sortings
800
x32082
1980A
Problem Generator
math
800
x37150
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x27110
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x20309
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x23215
1977A
Little Nikita
math
800
x28467
1976A
Verify Password
implementation
,
sortings
,
strings
800
x26168
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x17556
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x28495
1974A
Phone Desktop
greedy
,
math
800
x31168
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x21530
1971B
Different String
implementation
,
strings
800
x33365
1971A
My First Sorting Problem
implementation
,
sortings
800
x40408
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x18726
1968B
Prefiquence
greedy
,
two pointers
800
x26284
1968A
Maximize?
brute force
,
math
,
number theory
800
x31365
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x16768
1957A
Stickogon
constructive algorithms
,
greedy
800
x22080
1956B
Nene and the Card Game
games
,
greedy
800
x20420
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x20626
1955A
Yogurt Sale
math
800
x40243
1950C
Clock Conversion
implementation
,
math
800
x37501
1950B
Upscaling
implementation
800
x35855
1950A
Stair, Peak, or Neither?
implementation
800
x47966
1948A
Special Characters
brute force
,
constructive algorithms
800
x27540
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x25091
1945A
Setting up Camp
greedy
,
math
800
x26405
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x22577
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x16651
1941A
Rudolf and the Ticket
brute force
,
math
800
x40782
1937A
Shuffle Party
implementation
,
math
800
x22454
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x26796
1934A
Too Min Too Max
greedy
,
math
800
x24495
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x31294
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x36915
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x28209
1931B
Make Equal
greedy
800
x31240
1931A
Recovering a Small String
brute force
,
strings
800
x34866
1930A
Maximise The Score
greedy
,
sortings
800
x17921
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x24549
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x30337
1928A
Rectangle Cutting
geometry
,
math
800
x21948
1927A
Make it White
greedy
,
strings
800
x41406
1926B
Vlad and Shapes
geometry
,
implementation
800
x31223
1926A
Vlad and the Best of Five
implementation
800
x44965
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x28009
1923A
Moving Chips
greedy
,
implementation
800
x23971
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x26450
1921B
Arranging Cats
greedy
,
implementation
800
x32897
1921A
Square
greedy
,
math
800
x41469
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x27111
1919B
Plus-Minus Split
greedy
800
x29305
1919A
Wallet Exchange
games
,
math
800
x32479
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x29478
1917A
Least Product
constructive algorithms
,
math
800
x24825
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x25147
1915C
Can I Square?
binary search
,
implementation
800
x39884
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x40342
1915A
Odd One Out
bitmasks
,
implementation
800
x53092
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x29466
1914A
Problemsolving Log
implementation
,
strings
800
x30739
1913A
Rating Increase
implementation
800
x22945
1912L
LOL Lovers
strings
800
x6678
1909A
Distinct Buttons
implementation
,
math
800
x16075
1907A
Rook
implementation
800
x35371
1905A
Constructive Problems
constructive algorithms
,
math
800
x22415
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x27643
1902A
Binary Imbalance
constructive algorithms
800
x20411
1901A
Line Trip
greedy
,
math
800
x28024
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x24359
1899A
Game with Integers
games
,
math
,
number theory
800
x41383
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15550
1896A
Jagged Swaps
sortings
800
x20979
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20084
1895A
Treasure Chest
math
800
x23944
1894A
Secret Sport
implementation
,
strings
800
x18550
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18861
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17127
1890A
Doremy's Paint 3
constructive algorithms
800
x23986
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x25244
1884A
Simple Design
brute force
,
greedy
,
math
800
x17079
1883A
Morning
math
800
x24912
1882A
Increasing Sequence
greedy
800
x24936
1881A
Don't Try to Count
brute force
,
strings
800
x29541
1879A
Rigged!
greedy
800
x22798
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x30781
1878A
How Much Does Daytona Cost?
greedy
800
x41474
1877A
Goals of Victory
math
800
x20947
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x34023
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