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Codeforces Round 987 (Div. 2)
05:21:34
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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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Custom test
Problems
#
Name
1189B
Number Circle
greedy
,
math
,
sortings
1100
x14330
1189A
Keanu Reeves
strings
800
x15321
1187A
Stickers and Toys
math
900
x14910
1186A
Vus the Cossack and a Contest
implementation
800
x37820
1185C1
Exam in BerSU (easy version)
greedy
,
sortings
1200
x11426
1185B
Email from Polycarp
implementation
,
strings
1200
x13427
1185A
Ropewalkers
math
800
x14927
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5979
1183B
Equalize Prices
math
900
x18559
1183A
Nearest Interesting Number
implementation
800
x24957
1182A
Filling Shapes
dp
,
math
1000
x31367
1181A
Chunga-Changa
greedy
,
math
1000
x13690
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x25375
1178A
Prime Minister
greedy
800
x10462
1177A
Digits Sequence (Easy Edition)
implementation
1000
x5779
1176B
Merge it!
math
1100
x17212
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x23018
1175A
From Hero to Zero
implementation
,
math
900
x18319
1174B
Ehab Is an Odd Person
sortings
1200
x15571
1174A
Ehab Fails to Be Thanos
constructive algorithms
,
greedy
,
sortings
1000
x17760
1173B
Nauuo and Chess
constructive algorithms
,
greedy
1100
x9090
1173A
Nauuo and Votes
greedy
800
x16265
1169A
Circle Metro
implementation
,
math
900
x11972
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x19378
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11502
1166A
Silent Classroom
combinatorics
,
greedy
900
x14348
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x21312
1165A
Remainder
implementation
,
math
1100
x13822
1163A
Eating Soup
greedy
,
math
900
x13028
1162A
Zoning Restrictions Again
implementation
800
x8274
1159A
A pile of stones
implementation
,
math
800
x12714
1157A
Reachable Numbers
implementation
1100
x15711
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11932
1155A
Reverse a Substring
implementation
,
sortings
,
strings
1000
x15350
1154B
Make Them Equal
math
1200
x16686
1154A
Restoring Three Numbers
math
800
x71850
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9093
1153A
Serval and Bus
brute force
,
math
1000
x11517
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x15327
1151A
Maxim and Biology
brute force
,
strings
1000
x11231
1150B
Tiling Challenge
greedy
,
implementation
900
x11329
1150A
Stock Arbitraging
greedy
,
implementation
800
x11869
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x15289
1148A
Another One Bites The Dust
greedy
800
x14933
1146B
Hate "A"
implementation
,
strings
1100
x8617
1146A
Love "A"
implementation
,
strings
800
x22012
1144C
Two Shuffled Sequences
constructive algorithms
,
sortings
1000
x15428
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x17140
1144A
Diverse Strings
implementation
,
strings
800
x19342
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10577
1143A
The Doors
implementation
800
x13282
1141B
Maximal Continuous Rest
implementation
900
x21454
1141A
Game 23
implementation
,
math
1000
x32281
1140D
Minimum Triangulation
dp
,
greedy
,
math
1200
x12669
1140B
Good String
implementation
,
strings
1200
x11356
1140A
Detective Book
implementation
1000
x12352
1139B
Chocolates
greedy
,
implementation
1000
x16518
1139A
Even Substrings
implementation
,
strings
800
x16826
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x18545
1136B
Nastya Is Playing Computer Games
constructive algorithms
,
math
1000
x11740
1136A
Nastya Is Reading a Book
implementation
800
x16438
1133C
Balanced Team
sortings
,
two pointers
1200
x23417
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12967
1133A
Middle of the Contest
implementation
1000
x17596
1132B
Discounts
greedy
,
sortings
900
x13076
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x9633
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x14886
1131A
Sea Battle
math
800
x12461
1130B
Two Cakes
greedy
1200
x7930
1130A
Be Positive
implementation
800
x11656
1121B
Mike and Children
brute force
,
implementation
1200
x9084
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7201
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10859
1118B
Tanya and Candies
implementation
1200
x12234
1118A
Water Buying
math
800
x20206
1117B
Emotes
greedy
,
math
,
sortings
1000
x14479
1117A
Best Subsegment
implementation
,
math
1100
x11041
1115G1
AND oracle
*special problem
1100
x389
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18796
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17356
1111A
Superhero Transformation
implementation
,
strings
1000
x16912
1110A
Parity
math
900
x15116
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x23306
1108A
Two distinct points
implementation
800
x21897
1107B
Digital root
math
,
number theory
1000
x16058
1107A
Digits Sequence Dividing
greedy
,
strings
900
x12064
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14730
1106A
Lunar New Year and Cross Counting
implementation
800
x12364
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9923
1105A
Salem and Sticks
brute force
,
implementation
1100
x10994
1104B
Game with string
data structures
,
implementation
,
math
1200
x15007
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15439
1102C
Doors Breaking and Repairing
games
1200
x13135
1102A
Integer Sequence Dividing
math
800
x24507
1101A
Minimum Integer
math
1000
x17490
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x10121
1100A
Roman and Browser
implementation
1000
x10176
1099C
Postcard
constructive algorithms
,
implementation
1200
x9663
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x11169
1099A
Snowball
implementation
800
x12934
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