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EXTRA EX-09

2000 ≤ Rating ≤ 2099 (Extra)

Extra problems for users satisfying this condition: 2000 <= Codeforces Rating <= 2099 (Extra).

LEVEL Candidate Master
PROBLEMS 200
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# PROBLEM RATING DIFFICULTY TAGS STATUS
01 George and Accommodation
CF-467/A
800
LVL 1
implementation
02 Opponents
CF-688/A
800
LVL 1
implementation
03 Patrick and Shopping
CF-599/A
800
LVL 1
implementation
04 Mashmokh and Lights
CF-415/A
900
LVL 1
implementation
05 Squats
CF-424/A
900
LVL 1
implementation
06 Sereja and Mugs
CF-426/A
800
LVL 1
implementation
07 Summer Camp
CF-672/A
800
LVL 1
implementation
08 Case of the Zeros and Ones
CF-556/A
900
LVL 2
greedy
09 Lucky String
CF-110/B
1100
LVL 2
constructive algorithmsstrings
10 Queue on Bus Stop
CF-435/A
1000
LVL 2
implementation
11 Currency System in Geraldion
CF-560/A
1000
LVL 2
implementationsortings
12 Saitama Destroys Hotel
CF-608/A
1000
LVL 2
implementationmath
13 Lecture
CF-499/B
1000
LVL 2
implementationstrings
14 Uncowed Forces
CF-604/A
1000
LVL 2
implementation
15 Drazil and Date
CF-515/A
1000
LVL 2
math
16 Different is Good
CF-672/B
1000
LVL 2
constructive algorithmsimplementationstrings
17 Case of Fake Numbers
CF-556/B
1100
LVL 3
brute forceimplementation
18 Plant
CF-185/A
1300
LVL 3
math
19 Infinite Sequence
CF-675/A
1100
LVL 3
math
20 K-special Tables
CF-625/C
1300
LVL 3
constructive algorithmsimplementation
21 Digital Counter
CF-495/A
1100
LVL 3
implementation
22 Xor-tree
CF-429/A
1300
LVL 3
dfs and similartrees
23 Memory and Trident
CF-712/B
1100
LVL 3
implementationstrings
24 Vasya and Football
CF-493/A
1300
LVL 3
implementation
25 Lucky Mask
CF-146/B
1300
LVL 3
brute forceimplementation
26 Alternative Thinking
CF-603/A
1600
LVL 3
dpgreedymath
27 Tournament
CF-27/B
1300
LVL 3
bitmasksbrute forcedfs and similar +1
28 Sereja and Algorithm
CF-367/A
1500
LVL 3
data structuresimplementation
29 Megacity
CF-424/B
1200
LVL 3
binary searchgreedyimplementation +1
30 Beautiful Paintings
CF-651/B
1200
LVL 3
greedysortings
31 Petya and Square
CF-112/B
1200
LVL 3
implementationmath
32 Valuable Resources
CF-485/B
1300
LVL 3
brute forcegreedy
33 Progress Bar
CF-71/B
1300
LVL 3
implementationmath
34 Garland
CF-408/B
1200
LVL 3
implementation
35 War of the Corporations
CF-625/B
1200
LVL 3
constructive algorithmsgreedystrings
36 Misha and Changing Handles
CF-501/B
1100
LVL 3
data structuresdsustrings
37 Milking cows
CF-383/A
1600
LVL 3
data structuresgreedy
38 Sereja and Mirroring
CF-426/B
1300
LVL 3
implementation
39 The Child and Homework
CF-437/A
1300
LVL 3
implementation
40 Vasya and String
CF-676/C
1500
LVL 4
binary searchdpstrings +1
41 Pyramid of Glasses
CF-676/B
1500
LVL 4
implementationmathmath
42 Restoring Painting
CF-675/B
1400
LVL 4
brute forceconstructive algorithmsmath
43 Petya and Inequiations
CF-111/A
1400
LVL 4
greedy
44 Buns
CF-106/C
1700
LVL 4
dp
45 Sereja and Prefixes
CF-380/A
1600
LVL 4
binary searchbrute force
46 Cthulhu
CF-103/B
1500
LVL 4
dfs and similardsugraphs
47 Chris and Magic Square
CF-711/B
1400
LVL 4
constructive algorithmsimplementation
48 Logo Turtle
CF-132/C
1800
LVL 4
dp
49 Moodular Arithmetic
CF-603/B
1800
LVL 4
combinatoricsdfs and similardsu +2
50 Vasiliy's Multiset
CF-706/D
1800
LVL 4
binary searchbitmasksdata structures +1
51 Message
CF-156/A
1700
LVL 4
brute force
52 24 Game
CF-468/A
1500
LVL 4
constructive algorithmsgreedymath
53 Mike and Chocolate Thieves
CF-689/C
1700
LVL 4
binary searchcombinatoricsmath
54 Peter and Snow Blower
CF-613/A
1900
LVL 4
binary searchgeometryternary search
55 Secret Combination
CF-496/B
1500
LVL 4
brute forceconstructive algorithmsimplementation
56 Hometask
CF-154/A
1600
LVL 4
greedy
57 Alice and Bob
CF-346/A
1600
LVL 4
gamesmathnumber theory
58 Memory and De-Evolution
CF-712/C
1600
LVL 4
greedymath
59 Levko and Array Recovery
CF-360/A
1700
LVL 4
greedyimplementation
60 Vasya and Wrestling
CF-493/B
1400
LVL 4
implementation
61 Kay and Snowflake
CF-685/B
1900
LVL 4
data structuresdfs and similardp +1
62 Alternating Current
CF-343/B
1600
LVL 4
data structuresgreedyimplementation
63 Coloring Trees
CF-711/C
1700
LVL 4
dp
64 Multitasking
CF-384/B
1500
LVL 4
greedyimplementationsortings +1
65 History
CF-137/C
1500
LVL 4
sortings
66 Zuma
CF-607/B
1900
LVL 4
dp
67 Fish Weight
CF-297/B
1600
LVL 4
constructive algorithmsgreedy
68 Sereja and Swaps
CF-425/A
1500
LVL 4
brute forcesortings
69 The Child and Set
CF-437/B
1500
LVL 4
bitmasksgreedyimplementation +1
70 Tavas and Karafs
CF-535/C
1900
LVL 4
binary searchgreedymath
71 Once Again...
CF-582/B
1900
LVL 4
constructive algorithmsdpmatrices
72 Win or Freeze
CF-150/A
1400
LVL 4
gamesmathnumber theory
73 More Cowbell
CF-604/B
1400
LVL 4
binary searchgreedy
74 World Tour
CF-666/B
2000
LVL 4
graphsshortest paths
75 Chip 'n Dale Rescue Rangers
CF-590/B
2100
LVL 4
binary searchgeometrymath
76 Pythagorean Triples
CF-707/C
1500
LVL 4
mathnumber theory
77 Subsegments
CF-69/E
1800
LVL 4
data structuresimplementation
78 Divisible by Seven
CF-375/A
1600
LVL 4
mathnumber theory
79 The Two Routes
CF-601/A
1600
LVL 4
graphsshortest paths
80 Lipshitz Sequence
CF-601/B
2100
LVL 4
data structuresmath
81 Inna and Sequence
CF-374/D
2000
LVL 4
binary searchdata structuresdp +1
82 Theseus and labyrinth
CF-676/D
2000
LVL 5
graphsimplementationshortest paths
83 Table
CF-232/B
1900
LVL 5
bitmaskscombinatoricsdp +1
84 Gifts by the List
CF-681/D
2000
LVL 5
constructive algorithmsdfs and similargraphs +1
85 Fragile Bridges
CF-201/C
2000
LVL 5
dp
86 Minimization
CF-571/B
2000
LVL 5
dpgreedysortings
87 Lengthening Sticks
CF-571/A
2100
LVL 5
combinatoricsimplementationmath
88 Sereja and Periods
CF-314/B
2000
LVL 5
binary searchdfs and similarstrings
89 Anton and Ira
CF-584/E
2300
LVL 5
constructive algorithmsgreedymath
90 Vika and Segments
CF-610/D
2300
LVL 5
constructive algorithmsdata structuresgeometry +1
91 Karen and Supermarket
CF-815/C
2400
LVL 5
brute forcedptrees
92 Happy Tree Party
CF-593/D
2400
LVL 5
data structuresdfs and similargraphs +2
93 Number Transformation
CF-251/C
2000
LVL 5
dpgreedynumber theory
94 Invariance of Tree
CF-576/B
2100
LVL 5
constructive algorithmsdfs and similargreedy +1
95 Little Elephant and Shifts
CF-220/C
2100
LVL 5
data structures
96 Queue
CF-353/D
2000
LVL 5
constructive algorithmsdp
97 Ksenia and Pawns
CF-382/D
2200
LVL 5
dfs and similargraphsimplementation +1
98 Table Compression
CF-650/C
2200
LVL 5
dfs and similardpdsu +2
99 Petya and Spiders
CF-111/C
2100
LVL 5
bitmasksdpdsu
100 Free Market
CF-364/B
2200
LVL 5
dpgreedy
101 Relay Race
CF-213/C
2000
LVL 5
dp
102 Flawed Flow
CF-269/C
2100
LVL 5
constructive algorithmsflowsgraphs +1
103 Complete The Graph
CF-715/B
2300
LVL 5
binary searchconstructive algorithmsgraphs +1
104 Coloring Brackets
CF-149/D
1900
LVL 5
dp
105 Ilya and Roads
CF-313/D
2100
LVL 5
dp
106 Lucky Numbers
CF-95/B
1800
LVL 5
dpgreedy
107 Compartments
CF-356/C
2100
LVL 5
combinatoricsconstructive algorithmsgreedy +1
108 Xenia and Hamming
CF-356/B
1900
LVL 5
implementationmath
109 Little Elephant and Furik and Rubik
CF-204/C
2000
LVL 5
mathprobabilities
110 Inna and Binary Logic
CF-400/E
2100
LVL 5
binary searchbitmasksdata structures
111 The Road to Berland is Paved With Good Intentions
CF-228/E
1900
LVL 5
2-satdfs and similardsu +1
112 Maxim and Restaurant
CF-261/B
1900
LVL 5
dpmathprobabilities
113 Spongebob and Squares
CF-599/D
1900
LVL 5
brute forcemath
114 The table
CF-226/D
2100
LVL 5
constructive algorithmsgreedy
115 Numbers
CF-213/B
1900
LVL 5
combinatoricsdp
116 Vladik and cards
CF-743/E
2200
LVL 5
binary searchbitmasksbrute force +1
117 Partial Sums
CF-223/C
1900
LVL 5
combinatoricsmathnumber theory
118 Points on Plane
CF-576/C
2100
LVL 5
constructive algorithmsdivide and conquergeometry +2
119 Running Track
CF-615/C
2000
LVL 5
dpgreedystrings +1
120 Alyona and Strings
CF-682/D
1900
LVL 5
dpstrings
121 Famil Door and Brackets
CF-629/C
2000
LVL 5
dpstrings
122 Preparing for the Contest
CF-377/B
1900
LVL 5
binary searchdata structuresgreedy +1
123 Strictly Positive Matrix
CF-402/E
2200
LVL 5
graphsmath
124 Compatible Numbers
CF-165/E
2200
LVL 5
bitmasksbrute forcedfs and similar +1
125 Love Triangles
CF-553/C
2200
LVL 5
dfs and similardsugraphs
126 Police Patrol
CF-427/E
2000
LVL 5
greedyimplementationmath +1
127 Time to Raid Cowavans
CF-103/D
2100
LVL 5
brute forcedata structuressortings
128 Directed Roads
CF-711/D
1900
LVL 5
combinatoricsdfs and similargraphs +1
129 Money Transfers
CF-675/C
2100
LVL 5
constructive algorithmsdata structuresgreedy +1
130 Messenger
CF-631/D
2100
LVL 5
data structureshashingimplementation +2
131 Mishka and Interesting sum
CF-703/D
2100
LVL 5
data structures
132 Two Strings
CF-223/B
1900
LVL 5
data structuresdpstrings
133 Persistent Bookcase
CF-707/D
2200
LVL 5
bitmasksdata structuresdfs and similar +1
134 Ring Road 2
CF-27/D
2200
LVL 5
2-satdfs and similardsu +1
135 Lucky Number Representation
CF-354/E
2200
LVL 5
constructive algorithmsdfs and similardp
136 Little Elephant and LCM
CF-258/C
2000
LVL 5
binary searchcombinatoricsdp +1
137 Superior Periodic Subarrays
CF-582/C
2400
LVL 5
number theory
138 Pluses everywhere
CF-520/E
2200
LVL 5
combinatoricsdpmath +1
139 Cubes
CF-520/D
2100
LVL 5
gamesgreedyimplementation
140 Friends and Subsequences
CF-689/D
2100
LVL 5
binary searchdata structures
141 Kleofáš and the n-thlon
CF-601/C
2300
LVL 5
dpmathprobabilities
142 Mike and Geometry Problem
CF-689/E
2000
LVL 5
combinatoricsdata structuresdp +2
143 Lieges of Legendre
CF-603/C
2200
LVL 5
gamesmath
144 Apple Tree
CF-348/B
2100
LVL 5
dfs and similarnumber theorytrees
145 Sonya and Problem Wihtout a Legend
CF-713/C
2300
LVL 5
dpsortings
146 Ant Man
CF-704/B
2500
LVL 6
dpgraphsgreedy
147 Alyona and towers
CF-739/C
2500
LVL 6
data structures
148 Double Happiness
CF-113/C
2200
LVL 6
brute forcemathnumber theory
149 Lovely Matrix
CF-274/D
2200
LVL 6
dfs and similargraphsgreedy +1
150 Devu and Flowers
CF-451/E
2300
LVL 6
bitmaskscombinatoricsnumber theory
151 George and Cards
CF-387/E
2200
LVL 6
binary searchdata structures
152 Anya and Cubes
CF-525/E
2100
LVL 6
binary searchbitmasksbrute force +3
153 Game on Tree
CF-280/C
2200
LVL 6
implementationmathprobabilities +1
154 Garlands
CF-707/E
2400
LVL 6
data structures
155 Codeword
CF-666/C
2500
LVL 6
combinatoricsstrings
156 Game with Powers
CF-317/D
2300
LVL 6
dpgames
157 Graph Cutting
CF-405/E
2300
LVL 6
dfs and similargraphs
158 Wilbur and Trees
CF-596/D
2300
LVL 6
dpmathprobabilities +1
159 Thwarting Demonstrations
CF-191/E
2200
LVL 6
binary searchdata structurestrees
160 Trains and Statistic
CF-675/E
2300
LVL 6
data structuresdpgreedy
161 ZS and The Birthday Paradox
CF-711/E
2300
LVL 6
mathnumber theoryprobabilities
162 Arthur and Brackets
CF-508/E
2200
LVL 6
dpgreedy
163 Acyclic Organic Compounds
CF-601/D
2400
LVL 6
data structuresdfs and similardsu +3
164 Dividing Kingdom II
CF-687/D
2500
LVL 7
brute forcedata structuresdsu +2
165 Animals and Puzzle
CF-713/D
2700
LVL 7
binary searchdata structures
166 Splitting the Uniqueness
CF-297/C
2400
LVL 7
constructive algorithms
167 Curious Array
CF-407/C
2500
LVL 7
brute forcecombinatoricsimplementation +1
168 Igloo Skyscraper
CF-91/E
2500
LVL 7
data structuresgeometry
169 Clearing Up
CF-141/E
2300
LVL 7
constructive algorithmsdpdsu +1
170 President's Path
CF-416/E
2500
LVL 7
dpgraphsshortest paths
171 String
CF-123/D
2300
LVL 7
string suffix structures
172 Painting Square
CF-300/D
2300
LVL 7
dpfft
173 Alphabet Permutations
CF-610/E
2500
LVL 7
data structuresstrings
174 Kefa and Watch
CF-580/E
2500
LVL 7
data structureshashingstrings
175 Sereja and Sets
CF-425/E
2500
LVL 7
dp
176 Game with Strings
CF-354/B
2400
LVL 7
bitmasksdpgames
177 Clues
CF-156/D
2500
LVL 7
combinatoricsgraphs
178 Counter Attack
CF-190/E
2100
LVL 7
data structuresdsugraphs +2
179 Ilya and Two Numbers
CF-313/E
2300
LVL 7
constructive algorithmsdata structuresdsu +1
180 Lucky Country
CF-95/E
2500
LVL 7
dpdsugraphs
181 Interval Cubing
CF-311/D
2600
LVL 7
data structuresmath
182 Little Victor and Set
CF-460/D
2300
LVL 7
brute forceconstructive algorithmsmath
183 Minimum Modular
CF-303/C
2400
LVL 7
brute forcegraphsmath +1
184 Sandy and Nuts
CF-599/E
2600
LVL 7
bitmasksdptrees
185 Sereja and Straight Lines
CF-314/D
2500
LVL 7
binary searchdata structuresgeometry +2
186 Linear Kingdom Races
CF-115/E
2400
LVL 7
data structuresdp
187 Yaroslav and Points
CF-295/E
2500
LVL 7
data structures
188 Arpa’s overnight party and Mehrdad’s silent entering
CF-741/C
2600
LVL 7
constructive algorithmsdfs and similargraphs
189 Iahub and Xors
CF-341/D
2500
LVL 7
data structures
190 Working routine
CF-706/E
2500
LVL 7
data structuresimplementation
191 Sereja and Sets
CF-367/D
2400
LVL 7
bitmasksdfs and similar
192 Levko and Strings
CF-360/C
2500
LVL 7
combinatoricsdp
193 Product Sum
CF-631/E
2600
LVL 7
data structuresdpgeometry
194 Little Elephant and Tree
CF-258/E
2400
LVL 7
data structuresdfs and similartrees
195 Maze
CF-123/E
2500
LVL 8
dfs and similardpprobabilities +1
196 Blood Cousins Return
CF-246/E
2400
LVL 8
binary searchdata structuresdfs and similar +2
197 Drazil and Morning Exercise
CF-516/D
2800
LVL 8
dfs and similardpdsu +2
198 Jeff and Removing Periods
CF-351/D
2700
LVL 8
data structures
199 Bags and Coins
CF-356/D
2700
LVL 8
bitmasksconstructive algorithmsdp +1
200 Choosing Subtree is Fun
CF-372/D
2600
LVL 8
binary searchdata structuresdfs and similar +2
ANALYTICS

Quick Stats

≤ CANDIDATE MASTER
106
PROBLEMS
MASTER
39
PROBLEMS
INTERNATIONAL MASTER
16
PROBLEMS
≥ GRANDMASTER
39
PROBLEMS