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Educational Codeforces Round 167 (Rated for Div. 2)
21:05:59
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Difficulty:
—
greedy
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
#
Name
1148A
Another One Bites The Dust
greedy
800
x14776
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x16852
1139B
Chocolates
greedy
,
implementation
1000
x15885
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x17629
1132B
Discounts
greedy
,
sortings
900
x12799
1117B
Emotes
greedy
,
math
,
sortings
1000
x14003
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18425
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17076
1107A
Digits Sequence Dividing
greedy
,
strings
900
x11941
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14361
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18477
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16287
1077B
Disturbed People
greedy
1000
x18494
1061A
Coins
greedy
,
implementation
,
math
800
x21442
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16759
1041A
Heist
greedy
,
implementation
,
sortings
800
x24688
1040A
Palindrome Dance
greedy
1000
x9377
1016A
Death Note
greedy
,
implementation
,
math
900
x14734
1011A
Stages
greedy
,
implementation
,
sortings
900
x12006
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11293
996A
Hit the Lottery
dp
,
greedy
800
x86149
991B
Getting an A
greedy
,
sortings
900
x12418
978B
File Name
greedy
,
strings
800
x35419
946A
Partition
greedy
800
x16149
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11774
919A
Supermarket
brute force
,
greedy
,
implementation
800
x15975
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11488
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9209
903A
Hungry Student Problem
greedy
,
implementation
900
x14457
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10117
892A
Greed
greedy
,
implementation
900
x13289
888B
Buggy Robot
greedy
1000
x9582
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9402
859A
Declined Finalists
greedy
,
implementation
800
x7644
844A
Diversity
greedy
,
implementation
,
strings
1000
x10493
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10305
805A
Fake NP
greedy
,
math
1000
x17705
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15288
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10094
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31636
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x8845
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x47388
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28733
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24194
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x42824
701A
Cards
greedy
,
implementation
800
x19257
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x16582
616B
Dinner with Emma
games
,
greedy
1000
x11497
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x16901
588A
Duff and Meat
greedy
900
x22472
567A
Lineland Mail
greedy
,
implementation
900
x31038
556A
Case of the Zeros and Ones
greedy
900
x38459
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x17636
499A
Watching a movie
greedy
,
implementation
1000
x13776
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x56691
469A
I Wanna Be the Guy
greedy
,
implementation
800
x93196
447B
DZY Loves Strings
greedy
,
implementation
1000
x20056
439A
Devu, the Singer and Churu, the Joker
greedy
,
implementation
900
x25027
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x57571
412B
Network Configuration
greedy
,
sortings
900
x5323
412A
Poster
greedy
,
implementation
900
x4343
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x96398
389A
Fox and Number Game
greedy
,
math
1000
x13910
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16292
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x61944
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5973
369A
Valera and Plates
greedy
,
implementation
900
x10853
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8428
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6747
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x202820
337A
Puzzles
greedy
900
x76743
322A
Ciel and Dancing
greedy
1000
x8116
320A
Magic Numbers
brute force
,
greedy
900
x34371
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x16994
263B
Squares
greedy
,
implementation
,
sortings
900
x8776
250A
Paper Work
greedy
1000
x4017
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9116
231A
Team
brute force
,
greedy
800
x306144
230A
Dragons
greedy
,
sortings
1000
x75790
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x16154
178A2
Educational Game
greedy
1000
x1587
160A
Twins
greedy
,
sortings
900
x112824
149A
Business trip
greedy
,
implementation
,
sortings
900
x38378
137B
Permutation
greedy
1000
x13419
90A
Cableway
greedy
,
math
1000
x4550
58A
Chat room
greedy
,
strings
1000
x124462
50A
Domino piling
greedy
,
math
800
x233558
34B
Sale
greedy
,
sortings
900
x49759
16B
Burglar and Matches
greedy
,
implementation
,
sortings
900
x17206
3A
Shortest path of the king
greedy
,
shortest paths
1000
x18760
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