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→ Filter Problems
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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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Problems
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Status
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Custom test
Problems
#
Name
151A
Soft Drinking
implementation
,
math
800
x74539
149A
Business trip
greedy
,
implementation
,
sortings
900
x40100
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x93758
146A
Lucky Ticket
implementation
800
x15166
145A
Lucky Conversion
greedy
,
implementation
1200
x7164
144A
Arrival of the General
implementation
800
x97269
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4996
143A
Help Vasilisa the Wise 2
brute force
,
math
1000
x13935
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x84091
139A
Petr and Book
implementation
1000
x31512
137B
Permutation
greedy
1000
x13755
137A
Postcards and photos
implementation
900
x7215
136B
Ternary Logic
implementation
,
math
1100
x4878
136A
Presents
implementation
800
x119234
134A
Average Numbers
brute force
,
implementation
1200
x3998
133B
Unary
implementation
1200
x8824
133A
HQ9+
implementation
900
x106480
131B
Opposites Attract
implementation
,
math
1200
x7053
131A
cAPS lOCK
implementation
,
strings
1000
x86429
130A
Hexagonal numbers
*special problem
,
implementation
900
x1631
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x12344
129A
Cookies
implementation
900
x22857
127B
Canvas Frames
implementation
1000
x8882
127A
Wasted Time
geometry
900
x11296
125B
Simple XML
implementation
1000
x2947
124A
The number of positions
math
1000
x38730
122B
Lucky Substring
brute force
,
implementation
1000
x12378
122A
Lucky Division
brute force
,
number theory
1000
x125064
121A
Lucky Sum
implementation
1100
x9279
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3680
120B
Quiz League
implementation
1100
x3439
120A
Elevator
brute force
,
implementation
,
math
1000
x4840
119A
Epic Game
implementation
800
x27510
118B
Present from Lena
constructive algorithms
,
implementation
1000
x30217
118A
String Task
implementation
,
strings
1000
x194969
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13791
116A
Tram
implementation
800
x144042
115A
Party
dfs and similar
,
graphs
,
trees
900
x34938
114A
Cifera
math
1000
x14197
112B
Petya and Square
implementation
,
math
1200
x4174
112A
Petya and Strings
implementation
,
strings
800
x228445
110B
Lucky String
constructive algorithms
,
strings
1100
x10244
110A
Nearly Lucky Number
implementation
800
x157613
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x17746
108A
Palindromic Times
implementation
,
strings
1000
x9398
106B
Choosing Laptop
brute force
,
implementation
1000
x6121
106A
Card Game
implementation
1000
x7632
104A
Blackjack
implementation
800
x15464
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6010
102B
Sum of Digits
implementation
1000
x27091
102A
Clothes
brute force
1200
x3026
101A
Homework
greedy
1200
x3870
100A
Carpeting the Room
*special problem
,
implementation
1100
x930
99A
Help Far Away Kingdom
strings
800
x6717
96A
Football
implementation
,
strings
900
x160506
94A
Restoring Password
implementation
,
strings
900
x10625
92A
Chips
implementation
,
math
800
x18940
90B
African Crossword
implementation
,
strings
1100
x5342
90A
Cableway
greedy
,
math
1000
x4705
88A
Chord
brute force
,
implementation
1200
x3836
84A
Toy Army
math
,
number theory
900
x15157
82A
Double Cola
implementation
,
math
1100
x30365
80B
Depression
geometry
,
math
1200
x4446
80A
Panoramix's Prediction
brute force
800
x54411
79A
Bus Game
greedy
1200
x4093
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x13677
78A
Haiku
implementation
,
strings
800
x12697
75A
Life Without Zeros
implementation
1000
x26351
74A
Room Leader
implementation
1000
x5189
72G
Fibonacci army
*special problem
,
dp
1000
x2290
72C
Extraordinarily Nice Numbers
*special problem
,
math
1200
x923
71A
Way Too Long Words
strings
800
x390758
69B
Bets
greedy
,
implementation
1200
x3280
69A
Young Physicist
implementation
,
math
1000
x167722
68A
Irrational problem
implementation
,
number theory
1100
x4955
66B
Petya and Countryside
brute force
,
implementation
1100
x20665
63B
Settlers' Training
implementation
1200
x4842
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11570
61A
Ultra-Fast Mathematician
implementation
800
x112308
59B
Fortune Telling
implementation
,
number theory
1200
x6917
59A
Word
implementation
,
strings
800
x178525
58A
Chat room
greedy
,
strings
1000
x131212
56A
Bar
implementation
1000
x8718
55A
Flea travel
implementation
,
math
1200
x3468
53C
Little Frog
constructive algorithms
1200
x6505
53A
Autocomplete
implementation
1100
x5107
52A
123-sequence
implementation
900
x8783
50A
Domino piling
greedy
,
math
800
x250656
49A
Sleuth
implementation
800
x13490
48B
Land Lot
brute force
,
implementation
1200
x2696
48A
Rock-paper-scissors
implementation
,
schedules
900
x6252
47B
Coins
implementation
1200
x14113
47A
Triangular numbers
brute force
,
math
800
x15188
46B
T-shirts from Sponsor
implementation
1100
x3706
46A
Ball Game
brute force
,
implementation
800
x8782
45A
Codecraft III
implementation
900
x6787
44A
Indian Summer
implementation
900
x11393
43B
Letter
implementation
,
strings
1100
x17032
43A
Football
strings
1000
x57117
41A
Translation
implementation
,
strings
800
x148034
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