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Codeforces Round 1002 (Div. 2)
4 days
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Difficulty:
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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
114A
Cifera
math
1000
x14292
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x121
113D
Museum
math
,
matrices
,
probabilities
2700
x692
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1252
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2909
113A
Grammar Lessons
implementation
,
strings
1600
x2317
112B
Petya and Square
implementation
,
math
1200
x4246
112A
Petya and Strings
implementation
,
strings
800
x237325
111E
Petya and Rectangle
2900
x67
111D
Petya and Coloring
combinatorics
,
dp
2300
x795
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1410
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3743
111A
Petya and Inequiations
greedy
1400
x4830
110B
Lucky String
constructive algorithms
,
strings
1100
x10338
110A
Nearly Lucky Number
implementation
800
x164414
109E
Lucky Interval
brute force
,
math
2700
x105
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x824
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3660
109B
Lucky Probability
brute force
,
probabilities
1900
x1572
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x18058
108B
Datatypes
math
,
sortings
1400
x2500
108A
Palindromic Times
implementation
,
strings
1000
x9465
107E
Darts
geometry
,
probabilities
2700
x140
107D
Crime Management
dp
,
graphs
,
matrices
2400
x435
107C
Arrangement
bitmasks
,
dp
2400
x396
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3601
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5196
106E
Space Rescuers
geometry
,
ternary search
2100
x888
106D
Treasure Island
brute force
,
implementation
1700
x1372
106C
Buns
dp
1700
x6158
106B
Choosing Laptop
brute force
,
implementation
1000
x6193
106A
Card Game
implementation
1000
x7713
105E
Lift and Throw
brute force
2500
x194
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x141
105C
Item World
brute force
,
implementation
,
sortings
2200
x346
105B
Dark Assembly
brute force
,
probabilities
1800
x824
105A
Transmigration
implementation
1700
x1848
104A
Blackjack
implementation
800
x15665
103E
Buying Sets
flows
,
graph matchings
2900
x901
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2158
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x969
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x9111
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6058
102B
Sum of Digits
implementation
1000
x27699
102A
Clothes
brute force
1200
x3066
101E
Candies and Stones
divide and conquer
,
dp
2500
x523
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x708
101C
Vectors
implementation
,
math
2000
x709
101B
Buses
binary search
,
data structures
,
dp
1700
x2656
101A
Homework
greedy
1200
x3913
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x66
100I
Rotation
*special problem
,
geometry
,
math
1500
x359
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x84
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x128
100F
Polynom
*special problem
,
implementation
1800
x145
100E
Lamps in a Line
*special problem
,
math
1600
x279
100D
World of Mouth
*special problem
,
strings
1500
x312
100C
A+B
*special problem
,
implementation
1400
x550
100B
Friendly Numbers
*special problem
,
implementation
1500
x552
100A
Carpeting the Room
*special problem
,
implementation
1100
x948
99B
Help Chef Gerasim
implementation
,
sortings
1300
x3025
99A
Help Far Away Kingdom
strings
800
x6846
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x488
98D
Help Monks
constructive algorithms
2500
x188
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x314
98B
Help King
implementation
,
probabilities
,
trees
2200
x132
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1219
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x387
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x249
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x307
97B
Superset
constructive algorithms
,
divide and conquer
2300
x871
97A
Domino
brute force
,
implementation
2400
x268
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x16069
96A
Football
implementation
,
strings
900
x166023
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1561
95D
Horse Races
dp
,
math
2500
x459
95C
Volleyball
shortest paths
1900
x2853
95B
Lucky Numbers
dp
,
greedy
1800
x1263
95A
Hockey
implementation
,
strings
1600
x1700
94B
Friends
graphs
,
implementation
,
math
1300
x4761
94A
Restoring Password
implementation
,
strings
900
x10813
93E
Lostborn
dp
,
math
,
number theory
2600
x506
93D
Flags
dp
,
math
,
matrices
2500
x361
93C
Azembler
brute force
,
implementation
2500
x434
93B
End of Exams
greedy
1900
x925
93A
Frames
implementation
1700
x1973
92B
Binary Number
greedy
1300
x4921
92A
Chips
implementation
,
math
800
x19295
91E
Igloo Skyscraper
data structures
,
geometry
2500
x615
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x278
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x908
91B
Queue
binary search
,
data structures
1500
x6952
91A
Newspaper Headline
greedy
,
strings
1500
x3667
90B
African Crossword
implementation
,
strings
1100
x5388
90A
Cableway
greedy
,
math
1000
x4823
89E
Fire and Ice
greedy
2900
x102
89D
Space mines
geometry
2500
x242
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x627
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x528
89A
Robbery
greedy
1800
x1492
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