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Codeforces Round 1006 (Div. 3)
3 days
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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
167C
Wizards and Numbers
games
,
math
2300
x686
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2216
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2054
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21974
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x369
166C
Median
greedy
,
math
,
sortings
1500
x6618
166B
Polygons
geometry
,
sortings
2100
x2558
166A
Rank List
binary search
,
implementation
,
sortings
1100
x18282
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x7296
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1725
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12683
165B
Burning Midnight Oil
binary search
,
implementation
1500
x19148
165A
Supercentral Point
implementation
1000
x24204
164E
Polycarpus and Tasks
3100
x69
164D
Minimum Diameter
binary search
,
brute force
3100
x250
164C
Machine Programming
flows
,
graphs
2400
x908
164B
Ancient Berland Hieroglyphs
two pointers
2000
x479
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1023
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1783
163D
Large Refrigerator
brute force
2900
x523
163C
Conveyor
sortings
,
two pointers
2100
x562
163B
Lemmings
binary search
2000
x1074
163A
Substring and Subsequence
dp
1700
x2760
162J
Brackets
*special problem
1800
x99
162I
Truncatable primes
*special problem
2000
x78
162H
Alternating case
*special problem
1800
x222
162G
Non-decimal sum
*special problem
2000
x67
162F
Factorial zeros
*special problem
1800
x205
162E
HQ9+
*special problem
1800
x179
162D
Remove digits
*special problem
1900
x229
162C
Prime factorization
*special problem
1800
x862
162B
Binary notation
*special problem
1800
x315
162A
Pentagonal numbers
*special problem
,
implementation
1100
x818
161E
Polycarpus the Safecracker
brute force
,
dp
2500
x475
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x15739
161C
Abracadabra
divide and conquer
2400
x656
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1969
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4975
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x599
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2882
160C
Find Pair
implementation
,
math
,
sortings
1700
x3485
160B
Unlucky Ticket
greedy
,
sortings
1100
x14342
160A
Twins
greedy
,
sortings
900
x123275
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x1009
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4360
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x3035
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3839
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2504
158E
Phone Talks
*special problem
,
dp
,
sortings
1900
x1468
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6279
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9467
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x90197
158A
Next Round
*special problem
,
implementation
800
x265676
157B
Trace
geometry
,
sortings
1000
x13434
157A
Game Outcome
brute force
800
x7787
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x165
156D
Clues
combinatorics
,
graphs
2500
x1657
156C
Cipher
combinatorics
,
dp
2000
x2454
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2262
156A
Message
brute force
1700
x3092
155B
Combination
greedy
,
sortings
1100
x10392
155A
I_love_\%username\%
brute force
800
x79258
154E
Martian Colony
geometry
3000
x104
154D
Flatland Fencing
games
,
math
2400
x438
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2942
154B
Colliders
math
,
number theory
1600
x5078
154A
Hometask
greedy
1600
x4114
153E
Euclidean Distance
*special problem
2100
x81
153D
Date Change
*special problem
2000
x85
153C
Caesar Cipher
*special problem
2200
x393
153B
Binary notation
*special problem
1800
x159
153A
A + B
*special problem
1600
x884
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x496
152D
Frames
brute force
2600
x249
152C
Pocket Book
combinatorics
1400
x10865
152B
Steps
binary search
,
implementation
1300
x6886
152A
Marks
implementation
900
x17194
151B
Phone Numbers
implementation
,
strings
1200
x6500
151A
Soft Drinking
implementation
,
math
800
x78454
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x906
150D
Mission Impassable
dp
,
strings
2600
x631
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x649
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4414
150A
Win or Freeze
games
,
math
,
number theory
1400
x8018
149E
Martian Strings
string suffix structures
,
strings
2300
x2327
149D
Coloring Brackets
dp
1900
x4018
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5445
149B
Martian Clock
implementation
1600
x2293
149A
Business trip
greedy
,
implementation
,
sortings
900
x41251
148E
Porcelain
dp
1900
x4220
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x7526
148C
Terse princess
constructive algorithms
,
greedy
1700
x3171
148B
Escape
implementation
,
math
1500
x5604
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x97177
147B
Smile House
binary search
,
graphs
,
matrices
2500
x828
147A
Punctuation
implementation
,
strings
1300
x3724
146B
Lucky Mask
brute force
,
implementation
1300
x4569
146A
Lucky Ticket
implementation
800
x15465
145E
Lucky Queries
data structures
2400
x3363
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x252
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