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Custom test
Problems
#
Name
139B
Wallpaper
implementation
,
math
1600
x1274
139A
Petr and Book
implementation
1000
x28797
138A
Literature Lesson
implementation
1600
x2342
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1190
137A
Postcards and photos
implementation
900
x6920
136B
Ternary Logic
implementation
,
math
1100
x4705
136A
Presents
implementation
800
x109722
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x293
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7445
134A
Average Numbers
brute force
,
implementation
1200
x3811
133B
Unary
implementation
1200
x8645
133A
HQ9+
implementation
900
x100404
132B
Piet
implementation
2100
x471
132A
Turing Tape
implementation
1300
x2738
131B
Opposites Attract
implementation
,
math
1200
x6867
131A
cAPS lOCK
implementation
,
strings
1000
x81533
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x516
130A
Hexagonal numbers
*special problem
,
implementation
900
x1523
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11724
129A
Cookies
implementation
900
x21811
128D
Numbers
constructive algorithms
,
implementation
2000
x1088
128B
String
brute force
,
constructive algorithms
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2465
127B
Canvas Frames
implementation
1000
x8229
125B
Simple XML
implementation
1000
x2766
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3762
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3518
122B
Lucky Substring
brute force
,
implementation
1000
x12023
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x272
121A
Lucky Sum
implementation
1100
x8842
120G
Boom
implementation
1800
x680
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3587
120B
Quiz League
implementation
1100
x3341
120A
Elevator
brute force
,
implementation
,
math
1000
x4506
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1066
119A
Epic Game
implementation
800
x26933
118B
Present from Lena
constructive algorithms
,
implementation
1000
x28459
118A
String Task
implementation
,
strings
1000
x182058
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x311
117A
Elevator
implementation
,
math
1300
x1974
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13443
116A
Tram
implementation
800
x132775
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x116
113A
Grammar Lessons
implementation
,
strings
1600
x2237
112B
Petya and Square
implementation
,
math
1200
x4071
112A
Petya and Strings
implementation
,
strings
800
x210311
110A
Nearly Lucky Number
implementation
800
x143399
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x16665
108A
Palindromic Times
implementation
,
strings
1000
x9197
106D
Treasure Island
brute force
,
implementation
1700
x1292
106B
Choosing Laptop
brute force
,
implementation
1000
x5944
106A
Card Game
implementation
1000
x7428
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x135
105C
Item World
brute force
,
implementation
,
sortings
2200
x270
105A
Transmigration
implementation
1700
x1785
104A
Blackjack
implementation
800
x14862
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5870
102B
Sum of Digits
implementation
1000
x24711
101C
Vectors
implementation
,
math
2000
x685
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x109
100F
Polynom
*special problem
,
implementation
1800
x132
100C
A+B
*special problem
,
implementation
1400
x515
100B
Friendly Numbers
*special problem
,
implementation
1500
x535
100A
Carpeting the Room
*special problem
,
implementation
1100
x892
99B
Help Chef Gerasim
implementation
,
sortings
1300
x2896
98B
Help King
implementation
,
probabilities
,
trees
2200
x114
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1169
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x239
97A
Domino
brute force
,
implementation
2400
x250
96A
Football
implementation
,
strings
900
x149824
95A
Hockey
implementation
,
strings
1600
x1643
94B
Friends
graphs
,
implementation
,
math
1300
x4507
94A
Restoring Password
implementation
,
strings
900
x10166
93C
Azembler
brute force
,
implementation
2500
x410
93A
Frames
implementation
1700
x1911
92A
Chips
implementation
,
math
800
x18251
90B
African Crossword
implementation
,
strings
1100
x5171
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x510
88B
Keyboard
implementation
1500
x4378
88A
Chord
brute force
,
implementation
1200
x3740
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x848
87B
Vasya and Types
implementation
,
strings
1800
x1115
87A
Trains
implementation
,
math
1500
x5189
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12594
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1913
85A
Domino
constructive algorithms
,
implementation
1300
x1759
84C
Biathlon
binary search
,
implementation
1700
x1588
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2017
82A
Double Cola
implementation
,
math
1100
x29505
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x327
81B
Sequence Formatting
implementation
,
strings
1700
x1877
81A
Plug-in
implementation
1400
x10209
79B
Colorful Field
implementation
,
sortings
1400
x6829
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x12778
78A
Haiku
implementation
,
strings
800
x11988
77D
Domino Carpet
dp
,
implementation
2300
x310
77A
Heroes
brute force
,
implementation
1400
x1746
76E
Points
implementation
,
math
1700
x1660
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1740
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→ Filter Problems
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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