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Codeforces Round 995 (Div. 3)
06:11:07
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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
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Name
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1020
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1747
163D
Large Refrigerator
brute force
2900
x510
163C
Conveyor
sortings
,
two pointers
2100
x558
163B
Lemmings
binary search
2000
x1068
163A
Substring and Subsequence
dp
1700
x2737
162J
Brackets
*special problem
1800
x97
162I
Truncatable primes
*special problem
2000
x77
162H
Alternating case
*special problem
1800
x220
162G
Non-decimal sum
*special problem
2000
x65
162F
Factorial zeros
*special problem
1800
x202
162E
HQ9+
*special problem
1800
x178
162D
Remove digits
*special problem
1900
x228
162C
Prime factorization
*special problem
1800
x849
162B
Binary notation
*special problem
1800
x314
162A
Pentagonal numbers
*special problem
,
implementation
1100
x816
161E
Polycarpus the Safecracker
brute force
,
dp
2500
x469
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x15326
161C
Abracadabra
divide and conquer
2400
x654
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1965
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4940
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x597
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2828
160C
Find Pair
implementation
,
math
,
sortings
1700
x3464
160B
Unlucky Ticket
greedy
,
sortings
1100
x14179
160A
Twins
greedy
,
sortings
900
x120632
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x1004
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4338
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x3008
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3822
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2498
158E
Phone Talks
*special problem
,
dp
,
sortings
1900
x1464
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6261
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9331
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x88631
158A
Next Round
*special problem
,
implementation
800
x257610
157B
Trace
geometry
,
sortings
1000
x13313
157A
Game Outcome
brute force
800
x7719
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x163
156D
Clues
combinatorics
,
graphs
2500
x1611
156C
Cipher
combinatorics
,
dp
2000
x2435
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2241
156A
Message
brute force
1700
x3052
155B
Combination
greedy
,
sortings
1100
x10352
155A
I_love_\%username\%
brute force
800
x77446
154E
Martian Colony
geometry
3000
x98
154D
Flatland Fencing
games
,
math
2400
x434
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2895
154B
Colliders
math
,
number theory
1600
x4836
154A
Hometask
greedy
1600
x4078
153E
Euclidean Distance
*special problem
2100
x80
153D
Date Change
*special problem
2000
x83
153C
Caesar Cipher
*special problem
2200
x391
153B
Binary notation
*special problem
1800
x157
153A
A + B
*special problem
1600
x824
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x488
152D
Frames
brute force
2600
x245
152C
Pocket Book
combinatorics
1400
x10714
152B
Steps
binary search
,
implementation
1300
x6797
152A
Marks
implementation
900
x16962
151B
Phone Numbers
implementation
,
strings
1200
x6412
151A
Soft Drinking
implementation
,
math
800
x75886
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x875
150D
Mission Impassable
dp
,
strings
2600
x627
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x644
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4257
150A
Win or Freeze
games
,
math
,
number theory
1400
x7902
149E
Martian Strings
string suffix structures
,
strings
2300
x2302
149D
Coloring Brackets
dp
1900
x3936
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5415
149B
Martian Clock
implementation
1600
x2266
149A
Business trip
greedy
,
implementation
,
sortings
900
x40423
148E
Porcelain
dp
1900
x4119
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x7395
148C
Terse princess
constructive algorithms
,
greedy
1700
x3159
148B
Escape
implementation
,
math
1500
x5533
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x95026
147B
Smile House
binary search
,
graphs
,
matrices
2500
x798
147A
Punctuation
implementation
,
strings
1300
x3691
146B
Lucky Mask
brute force
,
implementation
1300
x4429
146A
Lucky Ticket
implementation
800
x15255
145E
Lucky Queries
data structures
2400
x3268
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x246
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1919
145B
Lucky Number 2
constructive algorithms
1800
x2227
145A
Lucky Conversion
greedy
,
implementation
1200
x7191
144E
Competition
data structures
,
greedy
2200
x592
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4061
144C
Anagram Search
implementation
,
strings
1500
x4034
144B
Meeting
implementation
1300
x5307
144A
Arrival of the General
implementation
800
x98709
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x5005
143A
Help Vasilisa the Wise 2
brute force
,
math
1000
x14023
142E
Help Greg the Dwarf 2
geometry
3000
x81
142D
Help Shrek and Donkey 2
games
2600
x350
142C
Help Caretaker
brute force
,
dp
2300
x932
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2228
142A
Help Farmer
brute force
,
math
1600
x2639
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x1116
141D
Take-off Ramps
graphs
,
shortest paths
2300
x910
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