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Codeforces Round 945 (Div. 2)
44:04:30
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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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Status
Standings
Custom test
Problems
#
Name
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2085
222B
Cosmic Tables
data structures
,
implementation
1300
x5984
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10378
221B
Little Elephant and Numbers
implementation
1300
x4504
221A
Little Elephant and Function
implementation
,
math
1000
x14712
220A
Little Elephant and Problem
implementation
,
sortings
1300
x11809
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5700
219A
k-String
implementation
,
strings
1000
x26073
218B
Airport
implementation
1100
x15772
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x8923
216B
Forming Teams
dfs and similar
,
implementation
1700
x6101
216A
Tiling with Hexagons
implementation
,
math
1200
x4916
215C
Crosses
brute force
,
implementation
2100
x480
215A
Bicycle Chain
brute force
,
implementation
900
x13930
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x322
208D
Prizes, Prizes, more Prizes
implementation
1200
x7494
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21561
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1085
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1399
203B
Game on Paper
brute force
,
implementation
1300
x2554
203A
Two Problems
brute force
,
implementation
1200
x4112
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15899
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x333
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x875
200C
Football Championship
brute force
,
implementation
1800
x1004
200B
Drinks
implementation
,
math
800
x108163
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25157
198A
About Bacteria
implementation
,
math
1700
x3112
195C
Try and Catch
expression parsing
,
implementation
1800
x1112
195B
After Training
data structures
,
implementation
,
math
1300
x5124
194A
Exams
implementation
,
math
900
x9636
192B
Walking in the Rain
brute force
,
implementation
1100
x6146
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10132
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x244
188G
Array Sorting
*special problem
,
implementation
1600
x325
188F
Binary Notation
*special problem
,
implementation
1400
x288
188E
HQ9+
*special problem
,
implementation
1400
x490
188D
Asterisks
*special problem
,
implementation
1100
x656
188C
LCM
*special problem
,
implementation
,
math
1400
x434
188B
A + Reverse B
*special problem
,
implementation
1300
x703
186A
Comparing Strings
implementation
,
strings
1100
x16238
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7824
182B
Vasya's Calendar
implementation
1000
x6798
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x278
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6714
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2455
180A
Defragmentation
implementation
1800
x522
177A2
Good Matrix Elements
implementation
800
x7063
177A1
Good Matrix Elements
implementation
800
x8189
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1288
175B
Plane of Tanks: Pro
implementation
1400
x1359
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2334
174B
File List
dp
,
greedy
,
implementation
1400
x2191
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x246
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2202
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1129
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2689
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5900
171H
A polyline
*special problem
,
implementation
1700
x266
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1247
171C
A Piece of Cake
*special problem
,
implementation
2000
x1053
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1199
168A
Wizards and Demonstration
implementation
,
math
900
x10290
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2012
166A
Rank List
binary search
,
implementation
,
sortings
1100
x16792
165B
Burning Midnight Oil
binary search
,
implementation
1500
x16556
165A
Supercentral Point
implementation
1000
x22614
162A
Pentagonal numbers
*special problem
,
implementation
1100
x792
160C
Find Pair
implementation
,
math
,
sortings
1700
x3382
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2454
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8886
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82597
158A
Next Round
*special problem
,
implementation
800
x233163
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2188
152B
Steps
binary search
,
implementation
1300
x6343
152A
Marks
implementation
900
x16203
151B
Phone Numbers
implementation
,
strings
1200
x6229
151A
Soft Drinking
implementation
,
math
800
x66027
149B
Martian Clock
implementation
1600
x2224
149A
Business trip
greedy
,
implementation
,
sortings
900
x37860
148B
Escape
implementation
,
math
1500
x5268
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x87350
147A
Punctuation
implementation
,
strings
1300
x3554
146B
Lucky Mask
brute force
,
implementation
1300
x4233
146A
Lucky Ticket
implementation
800
x14632
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x238
145A
Lucky Conversion
greedy
,
implementation
1200
x6959
144C
Anagram Search
implementation
,
strings
1500
x3886
144B
Meeting
implementation
1300
x5042
144A
Arrival of the General
implementation
800
x89261
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4916
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2137
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x78097
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1478
139B
Wallpaper
implementation
,
math
1600
x1274
139A
Petr and Book
implementation
1000
x28736
138A
Literature Lesson
implementation
1600
x2341
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1189
137A
Postcards and photos
implementation
900
x6909
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