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Name
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x764
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x827
26B
Regular Bracket Sequence
greedy
1400
x17943
26A
Almost Prime
number theory
900
x29319
25E
Test
hashing
,
strings
2200
x2263
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10640
25C
Roads in Berland
graphs
,
shortest paths
1900
x5958
25B
Phone numbers
implementation
1100
x9429
25A
IQ test
brute force
1300
x82708
24E
Berland collider
binary search
2300
x870
24D
Broken robot
dp
,
math
,
probabilities
2400
x1818
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1220
24B
F1 Champions
implementation
1500
x1734
24A
Ring road
graphs
1400
x4888
23E
Tree
dp
2500
x593
23D
Tetragon
geometry
,
math
2600
x328
23C
Oranges and Apples
constructive algorithms
,
sortings
2500
x1370
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3234
23A
You're Given a String...
brute force
,
greedy
1200
x5127
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1565
22D
Segments
greedy
,
sortings
1900
x2644
22C
System Administrator
graphs
1700
x2996
22B
Bargaining Table
brute force
,
dp
1500
x4114
22A
Second Order Statistics
brute force
800
x21277
21D
Traveling Graph
bitmasks
,
graph matchings
,
graphs
2400
x816
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2053
21B
Intersection
implementation
,
math
2000
x1318
21A
Jabber ID
implementation
,
strings
1900
x1799
20C
Dijkstra?
graphs
,
shortest paths
1900
x31023
20B
Equation
math
2000
x3724
20A
BerOS file system
implementation
1700
x6026
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1666
19D
Points
data structures
2800
x2187
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1061
19B
Checkout Assistant
dp
1900
x4509
19A
World Football Cup
implementation
1400
x2671
18E
Flag 2
dp
2000
x1031
18D
Seller Bob
brute force
,
dp
,
greedy
2000
x1042
18C
Stripe
data structures
,
implementation
1200
x12660
18B
Platforms
brute force
,
math
1700
x2082
18A
Triangle
brute force
,
geometry
1500
x5760
17E
Palisection
strings
2900
x1521
17D
Notepad
number theory
2400
x1044
17C
Balance
dp
2500
x824
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4568
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x15435
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x4775
16D
Logging
implementation
,
strings
1900
x1525
16C
Monitor
binary search
,
number theory
1800
x4593
16B
Burglar and Matches
greedy
,
implementation
,
sortings
900
x17206
16A
Flag
implementation
800
x13878
15E
Triangles
combinatorics
,
dp
2600
x561
15D
Map
data structures
,
implementation
,
sortings
2500
x728
15C
Industrial Nim
games
2000
x2176
15B
Laser
math
1800
x1429
15A
Cottage Village
implementation
,
sortings
1200
x3800
14E
Camels
dp
1900
x1625
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4360
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3275
14B
Young Photographer
implementation
1000
x6895
14A
Letter
implementation
800
x10314
13E
Holes
data structures
,
dsu
2700
x5490
13D
Triangles
dp
,
geometry
2600
x601
13C
Sequence
dp
,
sortings
2200
x4341
13B
Letter A
geometry
,
implementation
2000
x969
13A
Numbers
implementation
,
math
1000
x7589
12E
Start of the session
constructive algorithms
2100
x1173
12D
Ball
data structures
,
sortings
2400
x2171
12C
Fruits
greedy
,
implementation
,
sortings
1100
x5991
12B
Correct Solution?
implementation
,
sortings
1100
x8314
12A
Super Agent
implementation
800
x12665
11E
Forward, march!
binary search
,
dp
,
greedy
2800
x350
11D
A Simple Task
bitmasks
,
dp
,
graphs
2200
x4557
11C
How Many Squares?
implementation
2200
x596
11B
Jumping Jack
math
1600
x4544
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x12781
10E
Greedy Change
constructive algorithms
2600
x811
10D
LCIS
dp
2800
x4119
10C
Digital Root
number theory
2000
x1411
10B
Cinema Cashier
dp
,
implementation
1500
x1731
10A
Power Consumption Calculation
implementation
900
x6942
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x997
9D
How many trees?
combinatorics
,
divide and conquer
,
dp
1900
x3703
9C
Hexadecimal's Numbers
brute force
,
implementation
,
math
1200
x12653
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5371
9A
Die Roll
math
,
probabilities
800
x53756
8E
Beads
dp
,
graphs
2600
x669
8D
Two Friends
binary search
,
geometry
2600
x513
8C
Looking for Order
bitmasks
,
dp
2000
x3424
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4249
8A
Train and Peter
strings
1200
x5694
7E
Defining Macros
dp
,
expression parsing
,
implementation
2600
x694
7D
Palindrome Degree
hashing
,
strings
2200
x3554
7C
Line
math
,
number theory
1800
x4433
7B
Memory Manager
implementation
1600
x2537
7A
Kalevitch and Chess
brute force
,
constructive algorithms
1100
x7058
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3165
6D
Lizards and Basements 2
brute force
,
dp
2600
x1959
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13330
6B
President's Office
implementation
1100
x12453
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geometry
graph matchings
graphs
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implementation
interactive
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number theory
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sortings
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ternary search
trees
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