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Problems
#
Name
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
6A
Triangle
brute force
,
geometry
900
x19315
5E
Bindian Signalizing
data structures
2400
x2038
5D
Follow Traffic Rules
implementation
,
math
2100
x1663
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x13069
5B
Center Alignment
implementation
,
strings
1200
x5726
5A
Chat Servers Outgoing Traffic
implementation
1000
x9485
4D
Mysterious Present
dp
,
sortings
1700
x9953
4C
Registration System
data structures
,
hashing
,
implementation
1300
x79110
4B
Before an Exam
constructive algorithms
,
greedy
1200
x24050
4A
Watermelon
brute force
,
math
800
x492204
3D
Least Cost Bracket Sequence
greedy
2600
x3184
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7115
3B
Lorry
greedy
,
sortings
1900
x4419
3A
Shortest path of the king
greedy
,
shortest paths
1000
x18760
2C
Commentator problem
geometry
2600
x1726
2B
The least round way
dp
,
math
2000
x10516
2A
Winner
hashing
,
implementation
1500
x25479
1C
Ancient Berland Circus
geometry
,
math
2100
x5579
1B
Spreadsheet
implementation
,
math
1600
x21973
1A
Theatre Square
math
1000
x250142
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divide and conquer
dp
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expression parsing
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geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
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matrices
meet-in-the-middle
number theory
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shortest paths
sortings
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ternary search
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