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Pinely Round 4 (Div. 1 + Div. 2)
20:08:50
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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
60C
Mushroom Strife
brute force
,
dfs and similar
2100
x558
59E
Shortest Path
graphs
,
shortest paths
2000
x3260
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x610
58E
Expression
dp
2400
x353
58D
Calendar
greedy
,
strings
2000
x717
57E
Chess
math
,
shortest paths
3000
x256
57D
Journey
dp
,
math
2500
x334
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2279
56D
Changing a String
dp
2100
x1565
55E
Very simple problem
geometry
,
two pointers
2500
x689
55D
Beautiful numbers
dp
,
number theory
2500
x3754
54E
Vacuum Сleaner
geometry
2700
x189
54D
Writing a Song
brute force
,
dp
,
strings
2100
x528
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1261
53E
Dead Ends
bitmasks
,
dp
2500
x937
52C
Circular RMQ
data structures
2200
x8597
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x553
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x373
51D
Geometrical problem
implementation
2200
x462
50E
Square Equation Roots
math
2300
x348
50D
Bombing
binary search
,
dp
,
probabilities
2100
x609
50C
Happy Farm 5
geometry
2000
x741
49E
Common ancestor
dp
2300
x653
48H
Black and White
constructive algorithms
2800
x137
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x257
48F
Snow sellers
greedy
,
sortings
2800
x145
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x570
47E
Cannon
data structures
,
geometry
,
sortings
2200
x358
47D
Safe
brute force
2200
x759
47C
Crossword
implementation
2000
x767
46G
Emperor's Problem
geometry
2500
x110
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x320
45H
Road Problem
graphs
2100
x179
45G
Prime Problem
number theory
2200
x1007
45F
Goats and Wolves
greedy
2500
x127
45E
Director
constructive algorithms
,
greedy
2000
x533
45B
School
dp
,
dsu
2200
x271
44J
Triminoes
constructive algorithms
,
greedy
2000
x559
44I
Toys
brute force
,
combinatorics
2300
x185
44G
Shooting Gallery
data structures
,
implementation
2500
x396
44F
BerPaint
geometry
,
graphs
2700
x66
43E
Race
brute force
,
implementation
,
two pointers
2300
x388
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1069
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x198
42D
Strange town
constructive algorithms
,
math
2300
x393
42C
Safe cracking
brute force
,
constructive algorithms
2200
x472
40E
Number Table
combinatorics
2500
x661
40D
Interesting Sequence
math
2600
x129
40C
Berland Square
implementation
,
math
2300
x243
39K
Testing
2600
x84
39I
Tram
2500
x134
39G
Inverse Function
implementation
2400
x126
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x862
39C
Moon Craters
dp
,
sortings
2100
x573
39A
C*++ Calculations
expression parsing
,
greedy
2000
x668
38H
The Great Marathon
dp
2400
x279
38G
Queue
data structures
2300
x696
38F
Smart Boy
dp
,
games
,
strings
2100
x380
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x608
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x391
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x502
36D
New Game with a Chess Piece
games
2300
x688
36C
Bowls
geometry
,
implementation
2200
x332
35E
Parade
data structures
,
sortings
2100
x726
34E
Collisions
brute force
,
implementation
,
math
2000
x575
33E
Helper
2600
x126
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1167
32E
Hide-and-Seek
geometry
,
implementation
2400
x327
31E
TV Game
dp
2400
x1062
31D
Chocolate
dfs and similar
,
implementation
2000
x1018
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x710
30D
King's Problem?
geometry
,
greedy
2600
x424
29E
Quarrel
graphs
,
shortest paths
2400
x879
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2390
28E
DravDe saves the world
geometry
,
math
2800
x87
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x601
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x1013
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x4086
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2407
26E
Multithreading
constructive algorithms
2400
x368
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x768
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x839
25E
Test
hashing
,
strings
2200
x2317
24E
Berland collider
binary search
2300
x878
24D
Broken robot
dp
,
math
,
probabilities
2400
x1873
23E
Tree
dp
2500
x598
23D
Tetragon
geometry
,
math
2600
x331
23C
Oranges and Apples
constructive algorithms
,
sortings
2500
x1390
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1584
21D
Traveling Graph
bitmasks
,
graph matchings
,
graphs
2400
x853
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2070
21B
Intersection
implementation
,
math
2000
x1324
20B
Equation
math
2000
x3764
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1750
19D
Points
data structures
2800
x2216
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1078
18E
Flag 2
dp
2000
x1041
18D
Seller Bob
brute force
,
dp
,
greedy
2000
x1053
17E
Palisection
strings
2900
x1540
17D
Notepad
number theory
2400
x1053
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