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Problems
#
Name
115A
Party
dfs and similar
,
graphs
,
trees
900
x46977
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x4373
114A
Cifera
math
1000
x15394
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x190
113D
Museum
math
,
matrices
,
probabilities
2700
x998
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1518
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x3389
113A
Grammar Lessons
implementation
,
strings
1600
x2635
112B
Petya and Square
implementation
,
math
1200
x4642
112A
Petya and Strings
implementation
,
strings
800
x305679
111E
Petya and Rectangle
2900
x75
111D
Petya and Coloring
combinatorics
,
dp
2300
x949
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1642
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x4199
111A
Petya and Inequiations
greedy
1400
x5277
110B
Lucky String
constructive algorithms
,
strings
1100
x11187
110A
Nearly Lucky Number
implementation
800
x212537
109E
Lucky Interval
brute force
,
math
2700
x144
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x938
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x4269
109B
Lucky Probability
brute force
,
probabilities
1900
x1839
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x20379
108B
Datatypes
math
,
sortings
1400
x2781
108A
Palindromic Times
implementation
,
strings
1000
x10535
107E
Darts
geometry
,
probabilities
2700
x167
107D
Crime Management
dp
,
graphs
,
matrices
2400
x523
107C
Arrangement
bitmasks
,
dp
2400
x515
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x4523
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x6056
106E
Space Rescuers
geometry
,
ternary search
2100
x1034
106D
Treasure Island
brute force
,
implementation
1700
x1490
106C
Buns
dp
1700
x7361
106B
Choosing Laptop
brute force
,
implementation
1000
x6973
106A
Card Game
implementation
1000
x8676
105E
Lift and Throw
brute force
2500
x240
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x149
105C
Item World
brute force
,
implementation
,
sortings
2200
x413
105B
Dark Assembly
brute force
,
probabilities
1800
x937
105A
Transmigration
implementation
1700
x2049
104A
Blackjack
implementation
800
x17580
103E
Buying Sets
flows
,
graph matchings
2900
x1169
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2712
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x1078
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x11264
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6727
102B
Sum of Digits
implementation
1000
x33105
102A
Clothes
brute force
1200
x3482
101E
Candies and Stones
divide and conquer
,
dp
2500
x664
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x817
101C
Vectors
implementation
,
math
2000
x855
101B
Buses
binary search
,
data structures
,
dp
1700
x3254
101A
Homework
greedy
1200
x4510
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x77
100I
Rotation
*special problem
,
geometry
,
math
1500
x438
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x94
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x145
100F
Polynom
*special problem
,
implementation
1800
x163
100E
Lamps in a Line
*special problem
,
math
1600
x307
100D
World of Mouth
*special problem
,
strings
1500
x375
100C
A+B
*special problem
,
implementation
1400
x644
100B
Friendly Numbers
*special problem
,
implementation
1500
x622
100A
Carpeting the Room
*special problem
,
implementation
1100
x1067
99B
Help Chef Gerasim
implementation
,
sortings
1300
x3275
99A
Help Far Away Kingdom
strings
800
x8019
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x576
98D
Help Monks
constructive algorithms
2500
x213
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x377
98B
Help King
implementation
,
probabilities
,
trees
2200
x164
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1369
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x458
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x391
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x371
97B
Superset
constructive algorithms
,
divide and conquer
2300
x1030
97A
Domino
brute force
,
implementation
2400
x355
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x20090
96A
Football
implementation
,
strings
900
x203650
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x2149
95D
Horse Races
dp
,
math
2500
x561
95C
Volleyball
shortest paths
1900
x3530
95B
Lucky Numbers
dp
,
greedy
1800
x1436
95A
Hockey
implementation
,
strings
1600
x1883
94B
Friends
graphs
,
implementation
,
math
1300
x5491
94A
Restoring Password
implementation
,
strings
900
x12698
93E
Lostborn
dp
,
math
,
number theory
2600
x557
93D
Flags
dp
,
math
,
matrices
2500
x494
93C
Azembler
brute force
,
implementation
2500
x471
93B
End of Exams
greedy
1900
x1006
93A
Frames
implementation
1700
x2094
92B
Binary Number
greedy
1300
x5469
92A
Chips
implementation
,
math
800
x21982
91E
Igloo Skyscraper
data structures
,
geometry
2500
x732
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x324
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x1052
91B
Queue
binary search
,
data structures
1500
x8083
91A
Newspaper Headline
greedy
,
strings
1500
x4049
90B
African Crossword
implementation
,
strings
1100
x5816
90A
Cableway
greedy
,
math
1000
x5700
89E
Fire and Ice
greedy
2900
x122
89D
Space mines
geometry
2500
x340
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x716
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WorldQuant Round 1 (Codeforces Round 1128, Div. 1 + Div. 2)
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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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