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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 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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Status
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Custom test
Problems
#
Name
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x29831
1611A
Make Even
constructive algorithms
,
math
800
x31611
1610B
Kalindrome Array
greedy
,
two pointers
1100
x16205
1610A
Anti Light's Cell Guessing
math
900
x16151
1609B
William the Vigilant
implementation
,
strings
1100
x11730
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x17196
1608B
Build the Permutation
constructive algorithms
,
greedy
1200
x11785
1608A
Find Array
constructive algorithms
,
math
800
x19133
1607C
Minimum Extraction
brute force
,
sortings
1000
x25162
1607B
Odd Grasshopper
math
900
x26843
1607A
Linear Keyboard
implementation
,
strings
800
x37661
1606B
Update Files
greedy
,
implementation
,
math
1100
x18726
1606A
AB Balance
strings
900
x25182
1605B
Reverse Sort
greedy
,
sortings
1000
x18142
1605A
A.M. Deviation
math
,
number theory
800
x20701
1604B
XOR Specia-LIS-t
1100
x15740
1604A
Era
greedy
800
x21628
1602B
Divine Array
constructive algorithms
,
implementation
1100
x14160
1602A
Two Subsequences
implementation
800
x19060
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x21109
1598B
Groups
brute force
,
implementation
1000
x16148
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x23571
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x19874
1594B
Special Numbers
bitmasks
,
math
1100
x20085
1594A
Consecutive Sum Riddle
math
800
x24893
1593D1
All are Same
math
,
number theory
1100
x20324
1593C
Save More Mice
binary search
,
greedy
,
greedy
1000
x25087
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x27731
1593A
Elections
math
800
x37102
1592B
Hemose Shopping
constructive algorithms
,
dsu
,
math
,
sortings
1200
x16072
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x22407
1585B
Array Eversion
greedy
900
x15216
1585A
Life of a Flower
implementation
800
x17922
1584C
Two Arrays
greedy
,
math
,
sortings
900
x16508
1584B
Coloring Rectangles
greedy
,
math
1000
x13423
1584A
Mathematical Addition
math
800
x14945
1583B
Omkar and Heavenly Tree
constructive algorithms
,
trees
1200
x12358
1583A
Windblume Ode
math
,
number theory
800
x13772
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x15969
1582B
Luntik and Subsequences
combinatorics
,
math
900
x20943
1582A
Luntik and Concerts
math
800
x18609
1581B
Diameter of Graph
constructive algorithms
,
graphs
,
greedy
,
math
1200
x11485
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13506
1579E1
Permutation Minimization by Deque
constructive algorithms
,
greedy
,
math
1000
x21835
1579B
Shifting Sort
implementation
,
sortings
1100
x18216
1579A
Casimir's String Solitaire
math
,
strings
800
x39119
1578E
Easy Scheduling
implementation
,
math
1200
x3850
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4642
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x17378
1574A
Regular Bracket Sequences
constructive algorithms
800
x21953
1573A
Countdown
greedy
800
x21232
1571A
Sequence of Comparisons
*special problem
800
x1326
1569B
Chess Tournament
constructive algorithms
1000
x18944
1569A
Balanced Substring
implementation
800
x25623
1567B
MEXor Mixup
bitmasks
,
greedy
1000
x23461
1567A
Domino Disaster
implementation
,
strings
800
x30222
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x14061
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x17690
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x19762
1566A
Median Maximization
binary search
,
greedy
,
math
800
x23571
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19702
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25694
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16611
1560C
Infinity Table
implementation
,
math
800
x26731
1560B
Who's Opposite?
math
800
x35954
1560A
Dislike of Threes
implementation
800
x60952
1559C
Mocha and Hiking
constructive algorithms
,
graphs
1200
x20653
1559B
Mocha and Red and Blue
dp
,
greedy
900
x22664
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x31993
1557B
Moamen and k-subarrays
greedy
,
sortings
1100
x23546
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x28001
1556A
A Variety of Operations
math
800
x18117
1555A
PizzaForces
brute force
,
math
900
x28283
1554A
Cherry
greedy
800
x29497
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x18027
1553A
Digits Sum
math
,
number theory
800
x31272
1552A
Subsequence Permutation
sortings
,
strings
800
x23953
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x29619
1551A
Polycarp and Coins
greedy
,
math
800
x51547
1550B
Maximum Cost Deletion
greedy
,
math
1000
x26616
1550A
Find The Array
greedy
,
math
800
x28247
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x24578
1549A
Gregor and Cryptography
math
,
number theory
800
x32755
1547C
Pair Programming
greedy
,
two pointers
1100
x22819
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x26516
1547A
Shortest Path with Obstacle
implementation
,
math
800
x30599
1546B
AquaMoon and Stolen String
interactive
,
math
1200
x13204
1546A
AquaMoon and Two Arrays
brute force
,
greedy
800
x18249
1543B
Customising the Track
combinatorics
,
greedy
,
math
900
x23246
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x28752
1542A
Odd Set
math
800
x45286
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x29023
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x29525
1539C
Stable Groups
greedy
,
sortings
1200
x23297
1539B
Love Song
dp
,
implementation
,
strings
800
x24688
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x20237
1538B
Friends and Candies
greedy
,
math
800
x31794
1538A
Stone Game
brute force
,
dp
,
greedy
800
x37161
1537C
Challenging Cliffs
constructive algorithms
,
greedy
,
implementation
,
math
1200
x27900
1537B
Bad Boy
constructive algorithms
,
greedy
,
math
900
x30495
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