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Before contest
Kotlin Heroes: Practice 6
24:10:34
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
25:10:34
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binary search
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
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x31532
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x8732
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x10511
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x16474
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x15380
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x14265
978C
Letters
binary search
,
implementation
,
two pointers
1000
x13633
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x12733
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x4988
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x25898
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x22035
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x18873
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x17803
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x17511
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x17000
1463A
Dungeon
binary search
,
math
1100
x14431
1490C
Sum of Cubes
binary search
,
brute force
,
math
1100
x13738
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x13493
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x12916
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x12132
166A
Rank List
binary search
,
implementation
,
sortings
1100
x9895
1042A
Benches
binary search
,
implementation
1100
x8835
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x8714
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x7495
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x35910
474B
Worms
binary search
,
implementation
1200
x22843
1352C
K-th Not Divisible by n
binary search
,
math
1200
x22633
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x16882
1221C
Perfect Team
binary search
,
math
1200
x12742
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x11936
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x10182
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x9848
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x8289
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x7734
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x7728
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x7685
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x7165
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x5205
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x5136
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x33003
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x18762
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x13486
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x12350
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x12033
1217A
Creating a Character
binary search
,
math
1300
x11140
1260B
Obtain Two Zeroes
binary search
,
math
1300
x10765
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x9979
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x9537
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x9012
1076C
Meme Problem
binary search
,
math
1300
x8594
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x7984
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x7934
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x7229
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x6674
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x6625
996B
World Cup
binary search
,
math
1300
x6495
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x6133
152B
Steps
binary search
,
implementation
1300
x3991
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x3708
181B
Number of Triplets
binary search
,
brute force
1300
x1844
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x20610
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x14195
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x12092
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x10067
1183C
Computer Game
binary search
,
math
1400
x9462
1452B
Toy Blocks
binary search
,
greedy
,
math
,
sortings
1400
x9278
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x9268
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x8718
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x8343
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x7975
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x7905
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x7455
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x6718
604B
More Cowbell
binary search
,
greedy
1400
x6610
975C
Valhalla Siege
binary search
1400
x6214
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x5397
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x4924
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x3112
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2339
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x1534
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x1435
580B
Kefa and Company
binary search
,
sortings
,
two pointers
1500
x13810
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x10873
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x10270
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x9454
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x9082
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x8858
165B
Burning Midnight Oil
binary search
,
implementation
1500
x8728
1249C2
Good Numbers (hard version)
binary search
,
greedy
,
math
,
meet-in-the-middle
1500
x8587
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x8445
812C
Sagheer and Nubian Market
binary search
,
sortings
1500
x8039
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x7806
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x7762
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x7599
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x7189
1436C
Binary Search
binary search
,
combinatorics
1500
x7137
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x7029
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x6992
991C
Candies
binary search
,
implementation
1500
x6935
1010A
Fly
binary search
,
math
1500
x6737
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