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Custom test
Problems
#
Name
115B
Lawnmower
greedy
,
sortings
1500
x2880
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x4373
112B
Petya and Square
implementation
,
math
1200
x4642
111A
Petya and Inequiations
greedy
1400
x5276
110B
Lucky String
constructive algorithms
,
strings
1100
x11187
108B
Datatypes
math
,
sortings
1400
x2781
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x6055
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x11261
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6726
102A
Clothes
brute force
1200
x3482
101A
Homework
greedy
1200
x4506
100I
Rotation
*special problem
,
geometry
,
math
1500
x438
100D
World of Mouth
*special problem
,
strings
1500
x375
100C
A+B
*special problem
,
implementation
1400
x644
100B
Friendly Numbers
*special problem
,
implementation
1500
x622
100A
Carpeting the Room
*special problem
,
implementation
1100
x1067
99B
Help Chef Gerasim
implementation
,
sortings
1300
x3274
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x20086
94B
Friends
graphs
,
implementation
,
math
1300
x5491
92B
Binary Number
greedy
1300
x5468
91B
Queue
binary search
,
data structures
1500
x8082
91A
Newspaper Headline
greedy
,
strings
1500
x4049
90B
African Crossword
implementation
,
strings
1100
x5816
88B
Keyboard
implementation
1500
x5358
88A
Chord
brute force
,
implementation
1200
x4151
87A
Trains
implementation
,
math
1500
x5930
85A
Domino
constructive algorithms
,
implementation
1300
x2048
83A
Magical Array
math
1300
x7047
82A
Double Cola
implementation
,
math
1100
x32768
81A
Plug-in
implementation
1400
x14560
80B
Depression
geometry
,
math
1200
x5187
79B
Colorful Field
implementation
,
sortings
1400
x8113
79A
Bus Game
greedy
1200
x4660
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x15672
77A
Heroes
brute force
,
implementation
1400
x2007
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3679
74B
Train
dp
,
games
,
greedy
1500
x1814
72I
Goofy Numbers
*special problem
,
implementation
1500
x492
72C
Extraordinarily Nice Numbers
*special problem
,
math
1200
x1073
71B
Progress Bar
implementation
,
math
1300
x5504
70A
Cookies
math
1300
x3628
69B
Bets
greedy
,
implementation
1200
x3699
68A
Irrational problem
implementation
,
number theory
1100
x5457
66B
Petya and Countryside
brute force
,
implementation
1100
x23567
66A
Petya and Java
implementation
,
strings
1300
x7197
64B
Expression
*special problem
,
expression parsing
1500
x1061
64A
Factorial
*special problem
,
implementation
1300
x4484
63B
Settlers' Training
implementation
1200
x5280
62A
A Student's Dream
greedy
,
math
1300
x3891
61B
Hard Work
strings
1300
x4337
60B
Serial Time!
dfs and similar
,
dsu
1400
x5409
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x4457
59B
Fortune Telling
implementation
,
number theory
1200
x8190
58B
Coins
greedy
1300
x13503
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x3352
56B
Spoilt Permutation
implementation
1300
x4117
55A
Flea travel
implementation
,
math
1200
x3996
54A
Presents
implementation
1300
x2734
53D
Physical Education
sortings
1500
x2715
53C
Little Frog
constructive algorithms
1200
x7337
53A
Autocomplete
implementation
1100
x5932
51A
Cheaterius's Problem
implementation
1300
x2129
50B
Choosing Symbol Pairs
strings
1500
x6639
49B
Sum
math
1500
x2875
48D
Permutations
greedy
1500
x3074
48B
Land Lot
brute force
,
implementation
1200
x3127
47B
Coins
implementation
1200
x16554
46B
T-shirts from Sponsor
implementation
1100
x4236
45I
TCMCF+++
greedy
1400
x2879
44E
Anfisa the Monkey
dp
1400
x6307
44C
Holidays
implementation
1300
x4204
44B
Cola
implementation
1500
x2411
43C
Lucky Tickets
greedy
1300
x4882
43B
Letter
implementation
,
strings
1100
x21311
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x3248
41C
Email address
expression parsing
,
implementation
1300
x4334
41B
Martian Dollar
brute force
1400
x4745
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x4567
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3716
39H
Multiplication Table
implementation
1300
x3208
39F
Pacifist frogs
implementation
1300
x2022
39D
Cubical Planet
math
1100
x4820
39B
Company Income Growth
greedy
1300
x3187
38C
Blinds
brute force
1400
x2633
38B
Chess
brute force
,
implementation
,
math
1200
x4179
36A
Extra-terrestrial Intelligence
implementation
1300
x3643
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x9209
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4934
33A
What is for dinner?
greedy
,
implementation
1200
x5141
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4849
31A
Worms Evolution
implementation
1200
x13102
30A
Accounting
brute force
,
math
1400
x4157
29B
Traffic Lights
implementation
1500
x3445
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x6044
27A
Next Test
implementation
,
sortings
1200
x23729
26B
Regular Bracket Sequence
greedy
1400
x27861
25B
Phone numbers
implementation
1100
x11656
25A
IQ test
brute force
1300
x108180
24B
F1 Champions
implementation
1500
x2117
24A
Ring road
graphs
1400
x7516
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Educational Codeforces Round 195 (Rated for Div. 2)
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combine-tags-by-or
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2-sat
binary search
bitmasks
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chinese remainder theorem
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data structures
dfs and similar
divide and conquer
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dsu
expression parsing
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flows
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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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