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Codeforces Round (Div. 2)
3 days
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Difficulty:
—
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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Custom test
Problems
#
Name
93C
Azembler
brute force
,
implementation
2500
x412
93A
Frames
implementation
1700
x1917
92A
Chips
implementation
,
math
800
x18421
90B
African Crossword
implementation
,
strings
1100
x5214
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x610
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x511
88B
Keyboard
implementation
1500
x4459
88A
Chord
brute force
,
implementation
1200
x3770
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x861
87B
Vasya and Types
implementation
,
strings
1800
x1122
87A
Trains
implementation
,
math
1500
x5243
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x13004
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1941
85A
Domino
constructive algorithms
,
implementation
1300
x1770
84C
Biathlon
binary search
,
implementation
1700
x1594
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2020
82A
Double Cola
implementation
,
math
1100
x29750
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x331
81B
Sequence Formatting
implementation
,
strings
1700
x1920
81A
Plug-in
implementation
1400
x10373
79B
Colorful Field
implementation
,
sortings
1400
x6934
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x12979
78A
Haiku
implementation
,
strings
800
x12138
77D
Domino Carpet
dp
,
implementation
2300
x316
77A
Heroes
brute force
,
implementation
1400
x1751
76E
Points
implementation
,
math
1700
x1686
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1755
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3244
75A
Life Without Zeros
implementation
1000
x25395
74A
Room Leader
implementation
1000
x4999
72I
Goofy Numbers
*special problem
,
implementation
1500
x457
72H
Reverse It!
*special problem
,
implementation
1600
x261
72B
INI-file
*special problem
,
implementation
2200
x76
71D
Solitaire
brute force
,
implementation
2200
x610
71B
Progress Bar
implementation
,
math
1300
x4411
70E
Information Reform
dp
,
implementation
,
trees
2700
x481
69E
Subsegments
data structures
,
implementation
1800
x4061
69C
Game
implementation
2000
x575
69B
Bets
greedy
,
implementation
1200
x3218
69A
Young Physicist
implementation
,
math
1000
x158498
68A
Irrational problem
implementation
,
number theory
1100
x4856
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2078
66C
Petya and File System
data structures
,
implementation
1800
x1002
66B
Petya and Countryside
brute force
,
implementation
1100
x19856
66A
Petya and Java
implementation
,
strings
1300
x6263
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x89
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1323
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1789
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x333
64A
Factorial
*special problem
,
implementation
1300
x2734
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x718
63C
Bulls and Cows
brute force
,
implementation
1700
x1649
63B
Settlers' Training
implementation
1200
x4757
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11037
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x248
62B
Tyndex.Brome
binary search
,
implementation
1800
x1269
61A
Ultra-Fast Mathematician
implementation
800
x106086
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3556
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x609
59B
Fortune Telling
implementation
,
number theory
1200
x6760
59A
Word
implementation
,
strings
800
x166548
57B
Martian Architecture
implementation
1600
x995
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2830
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1128
56B
Spoilt Permutation
implementation
1300
x3656
56A
Bar
implementation
1000
x8426
55A
Flea travel
implementation
,
math
1200
x3361
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x745
54A
Presents
implementation
1300
x2028
53B
Blog Photo
binary search
,
implementation
1700
x1385
53A
Autocomplete
implementation
1100
x4909
52A
123-sequence
implementation
900
x8442
51D
Geometrical problem
implementation
2200
x444
51A
Cheaterius's Problem
implementation
1300
x1789
49D
Game
brute force
,
dp
,
implementation
1800
x1858
49A
Sleuth
implementation
800
x13069
48B
Land Lot
brute force
,
implementation
1200
x2631
48A
Rock-paper-scissors
implementation
,
schedules
900
x5794
47C
Crossword
implementation
2000
x758
47B
Coins
implementation
1200
x13350
46D
Parking Lot
data structures
,
implementation
1800
x965
46B
T-shirts from Sponsor
implementation
1100
x3596
46A
Ball Game
brute force
,
implementation
800
x8531
45A
Codecraft III
implementation
900
x6520
44G
Shooting Gallery
data structures
,
implementation
2500
x373
44C
Holidays
implementation
1300
x3256
44B
Cola
implementation
1500
x1925
44A
Indian Summer
implementation
900
x9951
43E
Race
brute force
,
implementation
,
two pointers
2300
x387
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1067
43B
Letter
implementation
,
strings
1100
x16071
42B
Game of chess unfinished
implementation
1700
x928
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2776
41C
Email address
expression parsing
,
implementation
1300
x3680
41A
Translation
implementation
,
strings
800
x138503
40C
Berland Square
implementation
,
math
2300
x243
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3933
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2869
39H
Multiplication Table
implementation
1300
x2635
39G
Inverse Function
implementation
2400
x125
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