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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 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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Custom test
Problems
#
Name
282D
Yet Another Number Game
dp
,
games
2100
x1448
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3036
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x207
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1324
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x4166
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4746
280A
Rectangle Puzzle
geometry
2000
x1473
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1450
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x766
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8292
277E
Binary Tree on Plane
flows
,
trees
2400
x1308
277D
Google Code Jam
dp
,
probabilities
2800
x338
277C
Game
games
,
implementation
2400
x453
277B
Set of Points
constructive algorithms
,
geometry
2300
x812
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1617
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13979
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2828
274E
Mirror Room
data structures
,
implementation
3000
x313
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1044
274C
The Last Hole!
brute force
,
geometry
2600
x350
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5046
273E
Dima and Game
dp
,
games
2600
x366
273D
Dima and Figure
dp
2400
x418
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1231
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2631
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x505
271D
Good Substrings
data structures
,
strings
1800
x11516
269E
String Theory
geometry
,
math
,
strings
3100
x109
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x451
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1688
269B
Greenhouse Effect
dp
1700
x6347
269A
Magical Boxes
greedy
,
math
1600
x3535
268E
Playlist
math
,
probabilities
,
sortings
2100
x1027
268D
Wall Bars
dp
2300
x511
267C
Berland Traffic
math
,
matrices
2700
x164
267B
Dominoes
dfs and similar
,
graphs
2000
x645
266E
More Queries to Array...
data structures
,
math
2500
x930
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x899
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1354
264E
Roadside Trees
data structures
,
dp
3000
x436
264D
Colorful Stones
dp
,
two pointers
2500
x422
264C
Choosing Balls
dp
2000
x2959
263E
Rhombus
brute force
,
data structures
,
dp
2500
x403
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3639
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1078
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x416
261D
Maxim and Increasing Subsequence
dp
2600
x577
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x779
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1419
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x459
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1556
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2987
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3831
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1131
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1287
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1796
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1453
257E
Greedy Elevator
data structures
,
implementation
2200
x298
257D
Sum
greedy
,
math
1900
x1610
257C
View Angle
brute force
,
geometry
,
math
1800
x4390
256E
Lucky Arrays
data structures
2400
x668
256D
Liars and Serge
dp
2700
x256
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x871
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2013
254E
Dormitory
dp
,
implementation
2100
x678
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x563
254C
Anagram
greedy
,
strings
1800
x1501
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x532
253D
Table with Letters - 2
brute force
,
two pointers
2000
x848
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2616
252B
Unsorting Array
brute force
,
sortings
1800
x1722
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x172
251D
Two Sets
bitmasks
,
math
2700
x482
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1043
251B
Playing with Permutations
implementation
,
math
1800
x1279
250E
Mad Joe
brute force
2000
x469
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x895
250C
Movie Critics
greedy
1600
x1951
249E
Endless Matrix
math
2600
x320
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x462
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x584
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x500
248C
Robo-Footballer
binary search
,
geometry
2000
x855
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x3377
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9491
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2637
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6856
245G
Suggested Friends
brute force
,
graphs
2200
x439
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x878
245C
Game with Coins
greedy
1700
x1552
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4515
243E
Matrix
data structures
3000
x192
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x215
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x530
243B
Hydra
graphs
,
sortings
2000
x1238
243A
The Brand New Function
bitmasks
1600
x3955
242E
XOR on Segment
bitmasks
,
data structures
2000
x9453
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1881
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8781
241G
Challenging Balloons
constructive algorithms
1900
x549
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