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→ Filter Problems
Difficulty:
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implementation
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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Custom test
Problems
#
Name
94A
Restoring Password
implementation
,
strings
900
x10636
93C
Azembler
brute force
,
implementation
2500
x424
93A
Frames
implementation
1700
x1966
92A
Chips
implementation
,
math
800
x18963
90B
African Crossword
implementation
,
strings
1100
x5348
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x624
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x525
88B
Keyboard
implementation
1500
x4718
88A
Chord
brute force
,
implementation
1200
x3837
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x909
87B
Vasya and Types
implementation
,
strings
1800
x1155
87A
Trains
implementation
,
math
1500
x5410
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x13940
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x2060
85A
Domino
constructive algorithms
,
implementation
1300
x1795
84C
Biathlon
binary search
,
implementation
1700
x1709
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2063
82A
Double Cola
implementation
,
math
1100
x30399
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x351
81B
Sequence Formatting
implementation
,
strings
1700
x1957
81A
Plug-in
implementation
1400
x11060
79B
Colorful Field
implementation
,
sortings
1400
x7294
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x13693
78A
Haiku
implementation
,
strings
800
x12925
77D
Domino Carpet
dp
,
implementation
2300
x329
77A
Heroes
brute force
,
implementation
1400
x1781
76E
Points
implementation
,
math
1700
x1720
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1832
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3325
75A
Life Without Zeros
implementation
1000
x26375
74A
Room Leader
implementation
1000
x5202
72I
Goofy Numbers
*special problem
,
implementation
1500
x465
72H
Reverse It!
*special problem
,
implementation
1600
x267
72B
INI-file
*special problem
,
implementation
2200
x78
71D
Solitaire
brute force
,
implementation
2200
x657
71B
Progress Bar
implementation
,
math
1300
x4560
70E
Information Reform
dp
,
implementation
,
trees
2700
x505
69E
Subsegments
data structures
,
implementation
1800
x4406
69C
Game
implementation
2000
x592
69B
Bets
greedy
,
implementation
1200
x3283
69A
Young Physicist
implementation
,
math
1000
x168083
68A
Irrational problem
implementation
,
number theory
1100
x4958
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2123
66C
Petya and File System
data structures
,
implementation
1800
x1078
66B
Petya and Countryside
brute force
,
implementation
1100
x20686
66A
Petya and Java
implementation
,
strings
1300
x6422
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x94
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1378
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1824
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x339
64A
Factorial
*special problem
,
implementation
1300
x3123
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x766
63C
Bulls and Cows
brute force
,
implementation
1700
x1737
63B
Settlers' Training
implementation
1200
x4842
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11600
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x252
62B
Tyndex.Brome
binary search
,
implementation
1800
x1293
61A
Ultra-Fast Mathematician
implementation
800
x112614
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3659
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x638
59B
Fortune Telling
implementation
,
number theory
1200
x6922
59A
Word
implementation
,
strings
800
x179254
57B
Martian Architecture
implementation
1600
x1022
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2917
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1172
56B
Spoilt Permutation
implementation
1300
x3741
56A
Bar
implementation
1000
x8724
55A
Flea travel
implementation
,
math
1200
x3473
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x776
54A
Presents
implementation
1300
x2082
53B
Blog Photo
binary search
,
implementation
1700
x1417
53A
Autocomplete
implementation
1100
x5116
52A
123-sequence
implementation
900
x8825
51D
Geometrical problem
implementation
2200
x482
51A
Cheaterius's Problem
implementation
1300
x1836
49D
Game
brute force
,
dp
,
implementation
1800
x1919
49A
Sleuth
implementation
800
x13505
48B
Land Lot
brute force
,
implementation
1200
x2700
48A
Rock-paper-scissors
implementation
,
schedules
900
x6262
47C
Crossword
implementation
2000
x790
47B
Coins
implementation
1200
x14126
46D
Parking Lot
data structures
,
implementation
1800
x986
46B
T-shirts from Sponsor
implementation
1100
x3709
46A
Ball Game
brute force
,
implementation
800
x8798
45A
Codecraft III
implementation
900
x6798
44G
Shooting Gallery
data structures
,
implementation
2500
x409
44C
Holidays
implementation
1300
x3493
44B
Cola
implementation
1500
x2013
44A
Indian Summer
implementation
900
x11435
43E
Race
brute force
,
implementation
,
two pointers
2300
x396
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1091
43B
Letter
implementation
,
strings
1100
x17058
42B
Game of chess unfinished
implementation
1700
x957
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2860
41C
Email address
expression parsing
,
implementation
1300
x3773
41A
Translation
implementation
,
strings
800
x148898
40C
Berland Square
implementation
,
math
2300
x253
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x4060
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3006
39H
Multiplication Table
implementation
1300
x2777
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