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Codeforces Round 987 (Div. 2)
08:47:04
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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
1248A
Integer Points
geometry
,
math
1000
x14177
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x14265
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15906
1244A
Pens and Pencils
math
800
x19298
1243B1
Character Swap (Easy Version)
strings
1000
x14922
1243A
Maximum Square
implementation
800
x15717
1238A
Prime Subtraction
math
,
number theory
900
x24541
1237A
Balanced Rating Changes
implementation
,
math
1000
x20041
1236A
Stones
brute force
,
greedy
,
math
800
x16476
1234B1
Social Network (easy version)
implementation
1000
x18812
1234A
Equalize Prices Again
math
800
x27898
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18773
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21704
1228A
Distinct Digits
brute force
,
implementation
800
x21848
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11936
1225A
Forgetting Things
math
900
x15858
1223B
Strings Equalization
strings
1000
x14976
1223A
CME
math
800
x21654
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16975
1220A
Cards
implementation
,
sortings
,
strings
800
x29971
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18512
1216A
Prefixes
strings
800
x18735
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11592
1213A
Chips Moving
math
900
x24159
1211A
Three Problems
*special problem
,
implementation
1000
x1425
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12239
1208A
XORinacci
math
900
x16865
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21953
1206B
Make Product Equal One
dp
,
implementation
900
x27040
1206A
Choose Two Numbers
math
,
sortings
800
x24527
1204B
Mislove Has Lost an Array
greedy
,
math
900
x17564
1204A
BowWow and the Timetable
math
1000
x20994
1203A
Circle of Students
implementation
1000
x16728
1201A
Important Exam
implementation
,
strings
900
x15753
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20478
1199B
Water Lily
geometry
,
math
1000
x20688
1199A
City Day
implementation
1000
x14946
1197B
Pillars
greedy
,
implementation
1000
x13897
1197A
DIY Wooden Ladder
greedy
,
math
,
sortings
900
x13571
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27821
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19945
1195A
Drinks Choosing
greedy
,
math
1000
x13156
1194A
Remove a Progression
math
800
x16368
1191A
Tokitsukaze and Enhancement
brute force
800
x18196
1189A
Keanu Reeves
strings
800
x15321
1187A
Stickers and Toys
math
900
x14910
1186A
Vus the Cossack and a Contest
implementation
800
x37820
1185A
Ropewalkers
math
800
x14927
1183B
Equalize Prices
math
900
x18559
1183A
Nearest Interesting Number
implementation
800
x24956
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
x5778
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x23018
1175A
From Hero to Zero
implementation
,
math
900
x18319
1174A
Ehab Fails to Be Thanos
constructive algorithms
,
greedy
,
sortings
1000
x17760
1173A
Nauuo and Votes
greedy
800
x16265
1169A
Circle Metro
implementation
,
math
900
x11972
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x19376
1166A
Silent Classroom
combinatorics
,
greedy
900
x14347
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x21311
1163A
Eating Soup
greedy
,
math
900
x13028
1162A
Zoning Restrictions Again
implementation
800
x8274
1159A
A pile of stones
implementation
,
math
800
x12714
1155A
Reverse a Substring
implementation
,
sortings
,
strings
1000
x15350
1154A
Restoring Three Numbers
math
800
x71848
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
1148A
Another One Bites The Dust
greedy
800
x14933
1146A
Love "A"
implementation
,
strings
800
x22010
1144C
Two Shuffled Sequences
constructive algorithms
,
sortings
1000
x15426
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x17138
1144A
Diverse Strings
implementation
,
strings
800
x19340
1143A
The Doors
implementation
800
x13282
1141B
Maximal Continuous Rest
implementation
900
x21453
1141A
Game 23
implementation
,
math
1000
x32281
1140A
Detective Book
implementation
1000
x12350
1139B
Chocolates
greedy
,
implementation
1000
x16517
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
1133A
Middle of the Contest
implementation
1000
x17596
1132B
Discounts
greedy
,
sortings
900
x13073
1131A
Sea Battle
math
800
x12461
1130A
Be Positive
implementation
800
x11656
1118A
Water Buying
math
800
x20204
1117B
Emotes
greedy
,
math
,
sortings
1000
x14478
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18796
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17355
1111A
Superhero Transformation
implementation
,
strings
1000
x16912
1110A
Parity
math
900
x15116
1108A
Two distinct points
implementation
800
x21897
1107B
Digital root
math
,
number theory
1000
x16057
1107A
Digits Sequence Dividing
greedy
,
strings
900
x12064
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