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Pinely Round 4 (Div. 1 + Div. 2)
14:05:04
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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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Status
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Custom test
Problems
#
Name
67B
Restoration of the Permutation
greedy
1800
x759
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2091
66D
Petya and His Friends
constructive algorithms
,
math
,
number theory
1700
x3101
66C
Petya and File System
data structures
,
implementation
1800
x1005
66A
Petya and Java
implementation
,
strings
1300
x6294
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1330
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1796
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x239
64D
Presents
*special problem
,
greedy
1800
x286
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x335
64B
Expression
*special problem
,
expression parsing
1500
x1006
64A
Factorial
*special problem
,
implementation
1300
x2751
63D
Dividing Island
constructive algorithms
1900
x1243
63C
Bulls and Cows
brute force
,
implementation
1700
x1657
62B
Tyndex.Brome
binary search
,
implementation
1800
x1279
62A
A Student's Dream
greedy
,
math
1300
x3411
61E
Enemy is weak
data structures
,
trees
1900
x10566
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6394
61B
Hard Work
strings
1300
x3822
60B
Serial Time!
dfs and similar
,
dsu
1400
x4526
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3571
59C
Title
expression parsing
1600
x2048
58C
Trees
brute force
1800
x1995
58B
Coins
greedy
1300
x12040
57C
Array
combinatorics
,
math
1900
x2452
57B
Martian Architecture
implementation
1600
x998
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2846
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1134
56B
Spoilt Permutation
implementation
1300
x3674
55C
Pie or die
games
1900
x1608
55B
Smallest number
brute force
1600
x2777
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x750
54A
Presents
implementation
1300
x2040
53D
Physical Education
sortings
1500
x1977
53B
Blog Photo
binary search
,
implementation
1700
x1388
52B
Right Triangles
combinatorics
1600
x2005
51C
Three Base Stations
binary search
,
greedy
1800
x1876
51B
bHTML Tables Analisys
expression parsing
1700
x854
51A
Cheaterius's Problem
implementation
1300
x1798
50B
Choosing Symbol Pairs
strings
1500
x5604
49D
Game
brute force
,
dp
,
implementation
1800
x1871
49C
Disposition
constructive algorithms
,
math
1700
x1666
49B
Sum
math
1500
x2434
48D
Permutations
greedy
1500
x2445
48C
The Race
math
1800
x765
46E
Comb
data structures
,
dp
1900
x934
46D
Parking Lot
data structures
,
implementation
1800
x966
46C
Hamsters and Tigers
two pointers
1600
x2349
45J
Planting Trees
constructive algorithms
1800
x924
45I
TCMCF+++
greedy
1400
x2343
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1657
45C
Dancing Lessons
data structures
1900
x876
44H
Phone Number
dp
1700
x1706
44E
Anfisa the Monkey
dp
1400
x4977
44D
Hyperdrive
math
1800
x702
44C
Holidays
implementation
1300
x3278
44B
Cola
implementation
1500
x1936
43C
Lucky Tickets
greedy
1300
x4212
42B
Game of chess unfinished
implementation
1700
x930
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2797
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1926
41D
Pawn
dp
1900
x2271
41C
Email address
expression parsing
,
implementation
1300
x3695
41B
Martian Dollar
brute force
1400
x3938
40B
Repaintings
math
1600
x1135
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3948
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2896
39H
Multiplication Table
implementation
1300
x2662
39F
Pacifist frogs
implementation
1300
x1524
39B
Company Income Growth
greedy
1300
x2602
38E
Let's Go Rolling!
dp
,
sortings
1800
x2533
38D
Vasya the Architect
implementation
1900
x483
38C
Blinds
brute force
1400
x2119
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1627
37B
Computer Game
greedy
,
implementation
1800
x873
36B
Fractal
implementation
1600
x1454
36A
Extra-terrestrial Intelligence
implementation
1300
x2950
35D
Animals
dp
,
greedy
1700
x3234
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6634
35B
Warehouse
implementation
1700
x999
34D
Road Map
dfs and similar
,
graphs
1600
x4972
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4143
33C
Wonderful Randomized Sum
greedy
1800
x2941
33B
String Problem
shortest paths
1800
x4317
32D
Constellation
implementation
1600
x1257
32C
Flea
math
1700
x2103
31C
Schedule
implementation
1700
x1766
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4197
30C
Shooting Gallery
dp
,
probabilities
1800
x1908
30B
Codeforces World Finals
implementation
1700
x1167
30A
Accounting
brute force
,
math
1400
x3394
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4746
29B
Traffic Lights
implementation
1500
x2906
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4514
28A
Bender Problem
implementation
1600
x779
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2743
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5275
26B
Regular Bracket Sequence
greedy
1400
x18423
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10814
25C
Roads in Berland
graphs
,
shortest paths
1900
x6040
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