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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 days
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*has extra registration
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Difficulty:
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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
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Custom test
Problems
#
Name
913B
Christmas Spruce
implementation
,
trees
1200
x16185
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x12148
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11493
911A
Nearest Minimums
implementation
1100
x11514
909B
Segments
constructive algorithms
,
math
1300
x6433
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7676
907A
Masha and Bears
brute force
,
implementation
1300
x5710
903C
Boxes Packing
greedy
1200
x18122
903B
The Modcrab
greedy
,
implementation
1200
x7770
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10905
902A
Visiting a Friend
greedy
,
implementation
1100
x9859
900B
Position in Fraction
math
,
number theory
1300
x7868
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8515
899B
Months and Years
implementation
1200
x5903
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9618
897B
Chtholly's request
brute force
1300
x7205
895A
Pizza Separation
brute force
,
implementation
1200
x6578
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x23611
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x9058
887B
Cubes for Masha
brute force
,
implementation
1300
x5650
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5483
884B
Japanese Crosswords Strike Back
implementation
1100
x6891
883M
Quadcopter Competition
greedy
,
math
1100
x3609
883F
Lost in Transliteration
implementation
1300
x2286
879B
Table Tennis
data structures
,
implementation
1200
x12500
877A
Alex and broken contest
implementation
,
strings
1100
x10900
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9226
875A
Classroom Watch
brute force
,
math
1200
x9651
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x9235
870B
Maximum of Maximums of Minimums
greedy
1200
x9607
869B
The Eternal Immortality
math
1100
x13780
869A
The Artful Expedient
brute force
,
implementation
1100
x9473
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x18366
858A
k-rounding
brute force
,
math
,
number theory
1100
x8096
854B
Maxim Buys an Apartment
constructive algorithms
,
math
1200
x8203
845A
Chess Tourney
implementation
,
sortings
1100
x7801
844B
Rectangles
combinatorics
,
math
1300
x7496
842B
Gleb And Pizza
geometry
1100
x10374
842A
Kirill And The Game
brute force
,
two pointers
1200
x10241
841B
Godsend
games
,
math
1100
x12322
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x7009
835B
The number on the board
greedy
1100
x11060
834B
The Festive Evening
data structures
,
implementation
1100
x8832
828B
Black Square
implementation
1300
x5705
828A
Restaurant Tables
implementation
1200
x7957
825A
Binary Protocol
implementation
1100
x7709
821B
Okabe and Banana Trees
brute force
,
math
1300
x5785
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5271
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6273
814B
An express train to reveries
constructive algorithms
1300
x5641
813A
The Contest
implementation
1100
x5106
812A
Sagheer and Crossroads
implementation
1200
x6223
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6512
810B
Summer sell-off
greedy
,
sortings
1300
x11525
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x7876
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3553
803B
Distances to Zero
constructive algorithms
1200
x6602
802M
April Fools' Problem (easy)
greedy
,
sortings
1200
x3158
801A
Vicious Keyboard
brute force
1100
x7344
799A
Carrot Cakes
brute force
,
implementation
1100
x19055
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8437
797A
k-Factorization
implementation
,
math
,
number theory
1100
x15686
796B
Find The Bone
implementation
1300
x9107
794B
Cutting Carrot
geometry
,
math
1200
x6645
792B
Counting-out Rhyme
implementation
1300
x6028
792A
New Bus Route
implementation
,
sortings
1100
x9031
789A
Anastasia and pebbles
implementation
,
math
1100
x9345
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5611
787A
The Monster
brute force
,
math
,
number theory
1200
x11464
785B
Anton and Classes
greedy
,
sortings
1100
x10251
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11920
779B
Weird Rounding
brute force
,
greedy
1100
x10365
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9499
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x21186
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4095
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2826
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3301
767A
Snacktower
data structures
,
implementation
1100
x20458
765C
Table Tennis Game 2
math
1200
x6995
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7138
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6881
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10226
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x12580
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11376
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7259
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8744
750B
New Year and North Pole
geometry
,
implementation
1300
x9495
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8514
747C
Servers
implementation
1300
x4669
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14963
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x11185
740B
Alyona and flowers
constructive algorithms
1200
x8339
740A
Alyona and copybooks
brute force
,
implementation
1300
x8919
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8407
733B
Parade
math
1100
x10687
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9768
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x8005
730H
Delete Them
constructive algorithms
,
implementation
1300
x3057
729B
Spotlights
dp
,
implementation
1200
x8004
725B
Food on the Plane
implementation
,
math
1200
x5153
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