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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 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
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Problems
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Status
Standings
Custom test
Problems
#
Name
785B
Anton and Classes
greedy
,
sortings
1100
x10251
785A
Anton and Polyhedrons
implementation
,
strings
800
x90556
780A
Andryusha and Socks
implementation
800
x19848
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11917
779B
Weird Rounding
brute force
,
greedy
1100
x10365
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9341
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10317
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x21169
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12167
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4095
770A
New Password
*special problem
,
implementation
800
x20050
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3300
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5793
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x27794
767A
Snacktower
data structures
,
implementation
1100
x20449
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33233
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x30798
765C
Table Tennis Game 2
math
1200
x6993
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7138
765A
Neverending competitions
implementation
,
math
900
x9034
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11899
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16373
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14550
760A
Petr and a calendar
implementation
,
math
800
x8246
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10225
758A
Holiday Of Equality
implementation
,
math
800
x61831
757A
Gotta Catch Em' All!
implementation
1000
x11282
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11356
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x18166
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7258
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8728
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x9119
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x76705
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8513
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x50018
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x9017
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8922
747A
Display Size
brute force
,
math
800
x10289
746B
Decoding
implementation
,
strings
900
x28278
746A
Compote
implementation
,
math
800
x21591
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10493
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14957
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x11185
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x43144
740B
Alyona and flowers
constructive algorithms
1200
x8339
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8405
735A
Ostap and Grasshopper
implementation
,
strings
800
x12527
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29501
734A
Anton and Danik
implementation
,
strings
800
x155352
733B
Parade
math
1100
x10687
733A
Grasshopper And the String
implementation
1000
x16186
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9754
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24655
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x73373
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x8004
731A
Night at the Museum
implementation
,
strings
800
x46302
729B
Spotlights
dp
,
implementation
1200
x8000
729A
Interview with Oleg
implementation
,
strings
900
x7505
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x14072
725B
Food on the Plane
implementation
,
math
1200
x5151
725A
Jumping Ball
implementation
1000
x7095
724A
Checking the Calendar
implementation
1000
x7104
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10213
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x79885
722B
Verse Pattern
implementation
,
strings
1200
x6508
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12108
721A
One-dimensional Japanese Crossword
implementation
800
x18619
719A
Vitya in the Countryside
implementation
1100
x15559
717C
Potions Homework
implementation
,
sortings
1200
x3955
716A
Crazy Computer
implementation
800
x22485
714B
Filya and Homework
implementation
,
sortings
1200
x14572
714A
Meeting of Old Friends
implementation
,
math
1100
x10800
712B
Memory and Trident
implementation
,
strings
1100
x9783
712A
Memory and Crow
implementation
,
math
800
x11913
711A
Bus to Udayland
brute force
,
implementation
800
x29576
710A
King Moves
implementation
800
x13858
709A
Juicer
implementation
900
x32627
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x9016
707A
Brain's Photos
implementation
800
x49637
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x64552
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14532
705B
Spider Man
games
,
math
1100
x9178
705A
Hulk
implementation
800
x108476
703A
Mishka and Game
implementation
800
x57292
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x45603
701B
Cells Not Under Attack
data structures
,
math
1200
x11800
701A
Cards
greedy
,
implementation
800
x19690
699A
Launch of Collider
implementation
1000
x16042
697A
Pineapple Incident
implementation
,
math
900
x12829
691A
Fashion in Berland
implementation
1000
x10234
690D1
The Wall (easy)
1200
x2624
690A1
Collective Mindsets (easy)
1100
x2879
688B
Lovely Palindromes
constructive algorithms
,
math
1000
x32437
688A
Opponents
implementation
800
x14026
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7807
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x37990
683A
The Check of the Point
*special problem
,
geometry
1200
x799
682B
Alyona and Mex
sortings
1200
x11569
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x21866
681A
A Good Contest
implementation
800
x15552
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