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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
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*has extra registration
→ Filter Problems
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
1304A
Two Rabbits
math
800
x25610
1303A
Erasing Zeroes
implementation
,
strings
800
x32603
1301A
Three Strings
implementation
,
strings
800
x19440
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x23702
1300A
Non-zero
implementation
,
math
800
x21079
1296B
Food Buying
math
900
x30455
1296A
Array with Odd Sum
math
800
x42419
1295A
Display The Number
greedy
900
x22950
1294B
Collecting Packages
implementation
,
sortings
1200
x21915
1294A
Collecting Coins
math
800
x47393
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21315
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15498
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19636
1288B
Yet Another Meme Problem
math
1100
x17109
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18440
1287A
Angry Students
greedy
,
implementation
800
x20691
1285A
Mezo Playing Zoma
math
800
x28411
1284A
New Year and Naming
implementation
,
strings
800
x18032
1283B
Candies Division
math
900
x21817
1283A
Minutes Before the New Year
math
800
x51421
1282A
Temporarily unavailable
implementation
,
math
900
x14911
1281A
Suffix Three
implementation
800
x18032
1279A
New Year Garland
math
900
x16986
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x16849
1277B
Make Them Odd
greedy
,
number theory
1200
x15311
1277A
Happy Birthday, Polycarp!
implementation
1000
x13446
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x26878
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13957
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20784
1271A
Suits
brute force
,
greedy
,
math
800
x15004
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x16454
1270A
Card Game
games
,
greedy
,
math
800
x17039
1269A
Equation
brute force
,
math
800
x21830
1267B
Balls of Buma
900
x4076
1266B
Dice Tower
constructive algorithms
,
math
1000
x15173
1266A
Competitive Programmer
chinese remainder theorem
,
math
1000
x16016
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x15169
1263A
Sweet Problem
math
1100
x16404
1260A
Heating
math
1000
x14845
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x16071
1257B
Magic Stick
math
1000
x21100
1257A
Two Rival Students
greedy
,
math
800
x20658
1256A
Payment Without Change
math
1000
x29819
1255B
Fridge Lockers
graphs
,
implementation
1100
x12021
1255A
Changing Volume
math
800
x17314
1253A
Single Push
implementation
1000
x18116
1252A
Copying Homework
1000
x5664
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x19768
1250F
Data Center
brute force
,
implementation
800
x7491
1249B1
Books Exchange (easy version)
dsu
,
math
1000
x20806
1249A
Yet Another Dividing into Teams
math
800
x22564
1248B
Grow The Tree
greedy
,
math
,
sortings
900
x16969
1248A
Integer Points
geometry
,
math
1000
x14193
1245B
Restricted RPS
constructive algorithms
,
dp
,
greedy
1200
x13886
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x14272
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15928
1244A
Pens and Pencils
math
800
x19317
1243B1
Character Swap (Easy Version)
strings
1000
x14938
1243A
Maximum Square
implementation
800
x15728
1238A
Prime Subtraction
math
,
number theory
900
x24569
1237A
Balanced Rating Changes
implementation
,
math
1000
x20081
1236A
Stones
brute force
,
greedy
,
math
800
x16504
1234B1
Social Network (easy version)
implementation
1000
x18835
1234A
Equalize Prices Again
math
800
x27992
1231C
Increasing Matrix
greedy
1100
x3880
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18782
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21726
1228A
Distinct Digits
brute force
,
implementation
800
x21881
1227B
Box
constructive algorithms
1200
x9705
1227A
Math Problem
math
1100
x9840
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11946
1225A
Forgetting Things
math
900
x15866
1223B
Strings Equalization
strings
1000
x14987
1223A
CME
math
800
x21663
1221C
Perfect Team
binary search
,
math
1200
x21330
1221B
Knights
constructive algorithms
,
greedy
1100
x11988
1221A
2048 Game
brute force
,
greedy
,
math
1000
x17008
1220A
Cards
implementation
,
sortings
,
strings
800
x30013
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18525
1216A
Prefixes
strings
800
x18744
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11598
1214C
Bad Sequence
data structures
,
greedy
1200
x13338
1214B
Badges
brute force
,
math
1100
x10883
1213C
Book Reading
math
1200
x18554
1213B
Bad Prices
data structures
,
implementation
1100
x26941
1213A
Chips Moving
math
900
x24176
1211A
Three Problems
*special problem
,
implementation
1000
x1425
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12256
1208A
XORinacci
math
900
x16890
1207B
Square Filling
constructive algorithms
,
greedy
,
implementation
1200
x13306
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21988
1206B
Make Product Equal One
dp
,
implementation
900
x27067
1206A
Choose Two Numbers
math
,
sortings
800
x24550
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14198
1204B
Mislove Has Lost an Array
greedy
,
math
900
x17569
1204A
BowWow and the Timetable
math
1000
x21019
1203B
Equal Rectangles
greedy
,
math
1200
x16044
1203A
Circle of Students
implementation
1000
x16743
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x9415
1201A
Important Exam
implementation
,
strings
900
x15776
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