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Pinely Round 4 (Div. 1 + Div. 2)
26:36:05
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→ Filter Problems
Difficulty:
—
implementation
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
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Custom test
Problems
#
Name
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2255
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1132
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2701
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x6017
171H
A polyline
*special problem
,
implementation
1700
x273
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1262
171C
A Piece of Cake
*special problem
,
implementation
2000
x1068
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1210
168A
Wizards and Demonstration
implementation
,
math
900
x10435
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2019
166A
Rank List
binary search
,
implementation
,
sortings
1100
x17253
165B
Burning Midnight Oil
binary search
,
implementation
1500
x17162
165A
Supercentral Point
implementation
1000
x23119
162A
Pentagonal numbers
*special problem
,
implementation
1100
x802
160C
Find Pair
implementation
,
math
,
sortings
1700
x3419
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2468
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9034
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x84534
158A
Next Round
*special problem
,
implementation
800
x239888
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2208
152B
Steps
binary search
,
implementation
1300
x6507
152A
Marks
implementation
900
x16474
151B
Phone Numbers
implementation
,
strings
1200
x6301
151A
Soft Drinking
implementation
,
math
800
x69216
149B
Martian Clock
implementation
1600
x2237
149A
Business trip
greedy
,
implementation
,
sortings
900
x38783
148B
Escape
implementation
,
math
1500
x5371
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x89760
147A
Punctuation
implementation
,
strings
1300
x3587
146B
Lucky Mask
brute force
,
implementation
1300
x4297
146A
Lucky Ticket
implementation
800
x14850
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x242
145A
Lucky Conversion
greedy
,
implementation
1200
x7010
144C
Anagram Search
implementation
,
strings
1500
x3933
144B
Meeting
implementation
1300
x5155
144A
Arrival of the General
implementation
800
x92343
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4953
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2190
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x80382
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1669
139B
Wallpaper
implementation
,
math
1600
x1289
139A
Petr and Book
implementation
1000
x29997
138A
Literature Lesson
implementation
1600
x2367
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1200
137A
Postcards and photos
implementation
900
x7034
136B
Ternary Logic
implementation
,
math
1100
x4813
136A
Presents
implementation
800
x113178
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x295
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7496
134A
Average Numbers
brute force
,
implementation
1200
x3854
133B
Unary
implementation
1200
x8734
133A
HQ9+
implementation
900
x102678
132B
Piet
implementation
2100
x659
132A
Turing Tape
implementation
1300
x2753
131B
Opposites Attract
implementation
,
math
1200
x6926
131A
cAPS lOCK
implementation
,
strings
1000
x83456
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x524
130A
Hexagonal numbers
*special problem
,
implementation
900
x1593
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11941
129A
Cookies
implementation
900
x22237
128D
Numbers
constructive algorithms
,
implementation
2000
x1102
128B
String
brute force
,
constructive algorithms
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2492
127B
Canvas Frames
implementation
1000
x8482
125B
Simple XML
implementation
1000
x2818
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3831
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3549
122B
Lucky Substring
brute force
,
implementation
1000
x12180
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x273
121A
Lucky Sum
implementation
1100
x9008
120G
Boom
implementation
1800
x684
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3622
120B
Quiz League
implementation
1100
x3396
120A
Elevator
brute force
,
implementation
,
math
1000
x4535
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1071
119A
Epic Game
implementation
800
x27167
118B
Present from Lena
constructive algorithms
,
implementation
1000
x29242
118A
String Task
implementation
,
strings
1000
x186618
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x319
117A
Elevator
implementation
,
math
1300
x1987
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13606
116A
Tram
implementation
800
x136495
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x118
113A
Grammar Lessons
implementation
,
strings
1600
x2272
112B
Petya and Square
implementation
,
math
1200
x4108
112A
Petya and Strings
implementation
,
strings
800
x216444
110A
Nearly Lucky Number
implementation
800
x148068
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x17089
108A
Palindromic Times
implementation
,
strings
1000
x9291
106D
Treasure Island
brute force
,
implementation
1700
x1307
106B
Choosing Laptop
brute force
,
implementation
1000
x6030
106A
Card Game
implementation
1000
x7526
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x138
105C
Item World
brute force
,
implementation
,
sortings
2200
x333
105A
Transmigration
implementation
1700
x1825
104A
Blackjack
implementation
800
x15141
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5927
102B
Sum of Digits
implementation
1000
x25508
101C
Vectors
implementation
,
math
2000
x690
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x76
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x112
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