Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rayan
→ Pay attention
Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1987C
Basil's Garden
dp
,
greedy
1200
x17412
1987B
K-Sort
greedy
1000
x20522
1987A
Upload More RAM
greedy
,
math
800
x25412
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x22904
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x26682
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x40664
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x19990
1985D
Manhattan Circle
implementation
,
math
900
x34731
1985C
Good Prefixes
greedy
1000
x32543
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x46559
1985A
Creating Words
implementation
,
strings
800
x54227
1984B
Large Addition
implementation
,
math
1100
x18348
1984A
Strange Splitting
constructive algorithms
800
x21195
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x16156
1983A
Array Divisibility
constructive algorithms
,
math
800
x25721
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x17645
1982B
Collatz Conjecture
brute force
,
implementation
,
math
,
number theory
1200
x17007
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x25205
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x22339
1980B
Choosing Cubes
sortings
,
sortings
800
x34784
1980A
Problem Generator
math
800
x40790
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x18847
1979B
XOR Sequences
bitmasks
,
greedy
1000
x22677
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x29102
1978B
New Bakery
binary search
,
greedy
,
math
,
ternary search
800
x22427
1978A
Alice and Books
constructive algorithms
,
greedy
,
sortings
800
x25797
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x17697
1977A
Little Nikita
math
800
x33223
1976B
Increase/Decrease/Copy
greedy
,
implementation
1100
x22329
1976A
Verify Password
implementation
,
sortings
,
strings
800
x28691
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x14640
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x17929
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x18559
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x30368
1974A
Phone Desktop
greedy
,
math
800
x33326
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x24656
1972B
Coin Games
games
900
x21712
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x23020
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x25998
1971C
Clock and Strings
implementation
900
x33339
1971B
Different String
implementation
,
strings
800
x37135
1971A
My First Sorting Problem
implementation
,
sortings
800
x45705
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x5025
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x19194
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x20014
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x25168
1968B
Prefiquence
greedy
,
two pointers
800
x28028
1968A
Maximize?
brute force
,
math
,
number theory
800
x34754
1966B
Rectangle Filling
constructive algorithms
,
implementation
1100
x15053
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x17938
1958A
1-3-5
*special problem
,
dp
1100
x1989
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x18021
1957A
Stickogon
constructive algorithms
,
greedy
800
x23407
1956B
Nene and the Card Game
games
,
greedy
800
x21319
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x21784
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x28118
1955A
Yogurt Sale
math
800
x43855
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x19554
1954B
Make It Ugly
implementation
,
math
1200
x18689
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x24288
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x14719
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x19846
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x23346
1950C
Clock Conversion
implementation
,
math
800
x40224
1950B
Upscaling
implementation
800
x38337
1950A
Stair, Peak, or Neither?
implementation
800
x53750
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x23099
1948A
Special Characters
brute force
,
constructive algorithms
800
x28755
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x20580
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x26151
1945C
Left and Right Houses
brute force
1200
x15051
1945B
Fireworks
math
,
number theory
900
x22863
1945A
Setting up Camp
greedy
,
math
800
x27850
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x16300
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x23904
1942B
Bessie and MEX
constructive algorithms
,
math
1100
x14087
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x17359
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x18507
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x33647
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x30088
1941A
Rudolf and the Ticket
brute force
,
math
800
x42736
1937A
Shuffle Party
implementation
,
math
800
x23260
1935B
Informatics in MAC
constructive algorithms
1200
x18702
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x28087
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x19125
1934A
Too Min Too Max
greedy
,
math
800
x25558
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x20475
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x22786
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x33089
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x38388
1932B
Chaya Calendar
number theory
1100
x20981
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x29936
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x29430
1931B
Make Equal
greedy
800
x32445
1931A
Recovering a Small String
brute force
,
strings
800
x36482
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x15475
1930A
Maximise The Score
greedy
,
sortings
800
x18716
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x25438
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x31775
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x17729
←
1
2
3
4
...
23
24
→
User lists
Name