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Before contest
Codeforces Round 962 (Div. 3)
23:20:18
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Difficulty:
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dp
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
225C
Barcode
dp
,
matrices
1700
x8921
223B
Two Strings
data structures
,
dp
,
strings
1900
x1746
222E
Decoding Genome
dp
,
matrices
1900
x2664
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x9039
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6598
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x328
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x545
213C
Relay Race
dp
2000
x2789
213B
Numbers
combinatorics
,
dp
1900
x1675
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1692
212C
Cowboys
combinatorics
,
dp
,
math
2100
x377
209A
Multicolored Marbles
dp
,
math
1600
x2284
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1807
208B
Solitaire
dfs and similar
,
dp
1900
x1350
204D
Little Elephant and Retro Strings
dp
2400
x446
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x5611
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x402
201C
Fragile Bridges
dp
2000
x1306
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x2984
191A
Dynasty Puzzles
dp
1500
x3881
189A
Cut Ribbon
brute force
,
dp
1300
x64620
187B
AlgoRace
dp
,
shortest paths
1800
x1948
185C
Clever Fat Rat
dp
2500
x133
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x400
182E
Wooden Fence
dp
1800
x1442
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1743
180C
Letter
dp
1400
x7211
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x322
176D
Hyper String
dp
2500
x305
176B
Word Cut
dp
1700
x1739
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x261
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x296
174B
File List
dp
,
greedy
,
implementation
1400
x2213
173C
Spiral Maximum
brute force
,
dp
1900
x970
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2121
166E
Tetrahedron
dp
,
math
,
matrices
1500
x20461
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x349
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6512
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12057
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1557
163A
Substring and Subsequence
dp
1700
x2643
161E
Polycarpus the Safecracker
brute force
,
dp
2500
x464
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x14212
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4291
158E
Phone Talks
*special problem
,
dp
,
sortings
1900
x1453
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x162
156C
Cipher
combinatorics
,
dp
2000
x2349
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x467
150D
Mission Impassable
dp
,
strings
2600
x593
149D
Coloring Brackets
dp
1900
x3689
148E
Porcelain
dp
1900
x3885
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6981
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1899
142C
Help Caretaker
brute force
,
dp
2300
x907
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x918
140E
New Year Garland
combinatorics
,
dp
2600
x884
138E
Hellish Constraints
brute force
,
dp
,
two pointers
2900
x171
138D
World of Darkraft
dp
,
games
2500
x478
137D
Palindromes
dp
,
strings
1900
x1488
132D
Constants in the language of Shakespeare
constructive algorithms
,
dp
,
greedy
2100
x608
132C
Logo Turtle
dp
1800
x2292
128C
Games with Rectangle
combinatorics
,
dp
2000
x2749
126D
Fibonacci Sums
dp
,
math
2300
x814
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x18679
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x706
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x598
120F
Spiders
dp
,
greedy
,
trees
1400
x3540
119C
Education Reform
dp
2000
x879
118D
Caesar's Legions
dp
1700
x17096
115E
Linear Kingdom Races
data structures
,
dp
2400
x1438
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x379
111D
Petya and Coloring
combinatorics
,
dp
2300
x728
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1333
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3289
107D
Crime Management
dp
,
graphs
,
matrices
2400
x402
107C
Arrangement
bitmasks
,
dp
2400
x364
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3392
106C
Buns
dp
1700
x5835
101E
Candies and Stones
divide and conquer
,
dp
2500
x480
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x675
101B
Buses
binary search
,
data structures
,
dp
1700
x2529
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x467
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1429
95D
Horse Races
dp
,
math
2500
x420
95B
Lucky Numbers
dp
,
greedy
1800
x1199
93E
Lostborn
dp
,
math
,
number theory
2600
x470
93D
Flags
dp
,
math
,
matrices
2500
x340
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x513
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x862
87C
Interesting Game
dp
,
games
,
math
2000
x1316
86C
Genetic engineering
dp
,
string suffix structures
,
trees
2500
x698
83E
Two Subsequences
bitmasks
,
dp
2800
x465
83D
Numbers
dp
,
math
,
number theory
2400
x841
82D
Two out of Three
dp
2000
x1952
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x331
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x1066
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1742
78C
Beaver Game
dp
,
games
,
number theory
2000
x1830
77D
Domino Carpet
dp
,
implementation
2300
x316
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x985
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