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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 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
1169A
Circle Metro
implementation
,
math
900
x11997
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x19398
1166A
Silent Classroom
combinatorics
,
greedy
900
x14363
1163A
Eating Soup
greedy
,
math
900
x13041
1162A
Zoning Restrictions Again
implementation
800
x8300
1159A
A pile of stones
implementation
,
math
800
x12726
1154A
Restoring Three Numbers
math
800
x72159
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x15349
1150B
Tiling Challenge
greedy
,
implementation
900
x11336
1150A
Stock Arbitraging
greedy
,
implementation
800
x11883
1148A
Another One Bites The Dust
greedy
800
x14944
1146A
Love "A"
implementation
,
strings
800
x22036
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x17168
1144A
Diverse Strings
implementation
,
strings
800
x19383
1143A
The Doors
implementation
800
x13294
1141B
Maximal Continuous Rest
implementation
900
x21473
1139A
Even Substrings
implementation
,
strings
800
x16837
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x18607
1136A
Nastya Is Reading a Book
implementation
800
x16451
1132B
Discounts
greedy
,
sortings
900
x13099
1131A
Sea Battle
math
800
x12464
1130A
Be Positive
implementation
800
x11667
1118A
Water Buying
math
800
x20223
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18818
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17387
1110A
Parity
math
900
x15127
1108A
Two distinct points
implementation
800
x21944
1107A
Digits Sequence Dividing
greedy
,
strings
900
x12082
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14741
1106A
Lunar New Year and Cross Counting
implementation
800
x12373
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15447
1102A
Integer Sequence Dividing
math
800
x24543
1099A
Snowball
implementation
800
x12939
1097A
Gennady and a Card Game
brute force
,
implementation
800
x39178
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18822
1095B
Array Stabilization
implementation
900
x22224
1095A
Repeating Cipher
implementation
800
x31991
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16618
1093A
Dice Rolling
math
800
x17750
1092B
Teams Forming
sortings
800
x26624
1092A
Uniform String
implementation
800
x16342
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17649
1089L
Lazyland
900
x4026
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16903
1085A
Right-Left Cipher
implementation
,
strings
800
x12200
1081A
Definite Game
constructive algorithms
,
math
800
x12129
1080B
Margarite and the best present
math
900
x11848
1080A
Petya and Origami
math
800
x18234
1077A
Frog Jumping
math
800
x30156
1075A
The King's Race
implementation
,
math
800
x8566
1065A
Vasya and Chocolate
implementation
,
math
800
x14696
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x22651
1061A
Coins
greedy
,
implementation
,
math
800
x22101
1060A
Phone Numbers
brute force
800
x14279
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x6191
1056A
Determine Line
implementation
800
x6747
1055A
Metro
graphs
900
x10789
1054A
Elevator or Stairs?
implementation
800
x9106
1047B
Cover Points
geometry
,
math
900
x17330
1047A
Little C Loves 3 I
math
800
x20044
1043A
Elections
implementation
,
math
800
x10824
1041A
Heist
greedy
,
implementation
,
sortings
800
x25245
1038A
Equality
implementation
,
strings
800
x14984
1032A
Kitchen Utensils
900
x6874
1031A
Golden Plate
implementation
,
math
800
x12920
1030A
In Search of an Easy Problem
implementation
800
x134849
1028A
Find Square
implementation
800
x10913
1025A
Doggo Recoloring
implementation
,
sortings
900
x15221
1017A
The Rank
implementation
800
x20580
1016A
Death Note
greedy
,
implementation
,
math
900
x14951
1015A
Points in Segments
implementation
800
x21071
1013A
Piles With Stones
math
800
x10994
1011A
Stages
greedy
,
implementation
,
sortings
900
x12276
1009A
Game Shopping
implementation
800
x11824
1008A
Romaji
implementation
,
strings
900
x15157
1006A
Adjacent Replacements
implementation
800
x21692
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x23758
1005A
Tanya and Stairways
implementation
800
x24019
1004A
Sonya and Hotels
implementation
900
x11276
1003A
Polycarp's Pockets
implementation
800
x27363
1002A1
Generate superposition of all basis states
800
x848
999B
Reversing Encryption
implementation
900
x17691
999A
Mishka and Contest
brute force
,
implementation
800
x23190
996A
Hit the Lottery
dp
,
greedy
800
x92857
994A
Fingerprints
implementation
800
x14225
992A
Nastya and an Array
implementation
,
sortings
800
x13213
991B
Getting an A
greedy
,
sortings
900
x12675
989A
A Blend of Springtime
implementation
,
strings
900
x10392
988A
Diverse Team
brute force
,
implementation
800
x25283
987A
Infinity Gauntlet
implementation
800
x16658
984A
Game
sortings
800
x19551
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9437
980A
Links and Pearls
implementation
,
math
900
x10445
978B
File Name
greedy
,
strings
800
x36711
978A
Remove Duplicates
implementation
800
x27388
977B
Two-gram
implementation
,
strings
900
x40189
977A
Wrong Subtraction
implementation
800
x171602
976A
Minimum Binary Number
implementation
800
x10565
975A
Aramic script
implementation
,
strings
900
x9340
965A
Paper Airplanes
math
800
x9584
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