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Rayan
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Before contest
Codeforces Round 995 (Div. 3)
12:35:46
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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
#
Name
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1080
119A
Epic Game
implementation
800
x27626
118E
Bertown roads
dfs and similar
,
graphs
2000
x6833
118D
Caesar's Legions
dp
1700
x17721
118C
Fancy Number
brute force
,
greedy
,
sortings
,
strings
1900
x2612
118B
Present from Lena
constructive algorithms
,
implementation
1000
x30463
118A
String Task
implementation
,
strings
1000
x197797
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x351
117D
Not Quick Transformation
divide and conquer
,
math
2500
x341
117C
Cycle
dfs and similar
,
graphs
2000
x2670
117B
Very Interesting Game
brute force
,
number theory
1800
x1617
117A
Elevator
implementation
,
math
1300
x2031
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13834
116A
Tram
implementation
800
x146723
115E
Linear Kingdom Races
data structures
,
dp
2400
x1665
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x407
115C
Plumber
math
2200
x600
115B
Lawnmower
greedy
,
sortings
1500
x2628
115A
Party
dfs and similar
,
graphs
,
trees
900
x35328
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3743
114A
Cifera
math
1000
x14241
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x120
113D
Museum
math
,
matrices
,
probabilities
2700
x689
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1244
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2848
113A
Grammar Lessons
implementation
,
strings
1600
x2308
112B
Petya and Square
implementation
,
math
1200
x4227
112A
Petya and Strings
implementation
,
strings
800
x232778
111E
Petya and Rectangle
2900
x67
111D
Petya and Coloring
combinatorics
,
dp
2300
x789
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1396
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3713
111A
Petya and Inequiations
greedy
1400
x4814
110B
Lucky String
constructive algorithms
,
strings
1100
x10287
110A
Nearly Lucky Number
implementation
800
x160834
109E
Lucky Interval
brute force
,
math
2700
x103
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x816
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3644
109B
Lucky Probability
brute force
,
probabilities
1900
x1559
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x17869
108B
Datatypes
math
,
sortings
1400
x2485
108A
Palindromic Times
implementation
,
strings
1000
x9433
107E
Darts
geometry
,
probabilities
2700
x140
107D
Crime Management
dp
,
graphs
,
matrices
2400
x432
107C
Arrangement
bitmasks
,
dp
2400
x395
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3532
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5154
106E
Space Rescuers
geometry
,
ternary search
2100
x877
106D
Treasure Island
brute force
,
implementation
1700
x1369
106C
Buns
dp
1700
x6067
106B
Choosing Laptop
brute force
,
implementation
1000
x6162
106A
Card Game
implementation
1000
x7664
105E
Lift and Throw
brute force
2500
x193
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x140
105C
Item World
brute force
,
implementation
,
sortings
2200
x346
105B
Dark Assembly
brute force
,
probabilities
1800
x821
105A
Transmigration
implementation
1700
x1846
104A
Blackjack
implementation
800
x15553
103E
Buying Sets
flows
,
graph matchings
2900
x889
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2140
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x963
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x9048
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6032
102B
Sum of Digits
implementation
1000
x27363
102A
Clothes
brute force
1200
x3048
101E
Candies and Stones
divide and conquer
,
dp
2500
x518
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x702
101C
Vectors
implementation
,
math
2000
x707
101B
Buses
binary search
,
data structures
,
dp
1700
x2645
101A
Homework
greedy
1200
x3889
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x64
100I
Rotation
*special problem
,
geometry
,
math
1500
x354
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x81
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x126
100F
Polynom
*special problem
,
implementation
1800
x137
100E
Lamps in a Line
*special problem
,
math
1600
x276
100D
World of Mouth
*special problem
,
strings
1500
x309
100C
A+B
*special problem
,
implementation
1400
x544
100B
Friendly Numbers
*special problem
,
implementation
1500
x548
100A
Carpeting the Room
*special problem
,
implementation
1100
x941
99B
Help Chef Gerasim
implementation
,
sortings
1300
x3008
99A
Help Far Away Kingdom
strings
800
x6762
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x483
98D
Help Monks
constructive algorithms
2500
x186
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x312
98B
Help King
implementation
,
probabilities
,
trees
2200
x130
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1218
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x384
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x249
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x305
97B
Superset
constructive algorithms
,
divide and conquer
2300
x867
97A
Domino
brute force
,
implementation
2400
x267
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x15838
96A
Football
implementation
,
strings
900
x163176
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1544
95D
Horse Races
dp
,
math
2500
x429
95C
Volleyball
shortest paths
1900
x2839
95B
Lucky Numbers
dp
,
greedy
1800
x1255
95A
Hockey
implementation
,
strings
1600
x1688
94B
Friends
graphs
,
implementation
,
math
1300
x4725
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