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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
21:20:51
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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
49E
Common ancestor
dp
2300
x678
49D
Game
brute force
,
dp
,
implementation
1800
x1919
49C
Disposition
constructive algorithms
,
math
1700
x1697
49B
Sum
math
1500
x2496
49A
Sleuth
implementation
800
x13505
48H
Black and White
constructive algorithms
2800
x152
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x277
48F
Snow sellers
greedy
,
sortings
2800
x160
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x588
48D
Permutations
greedy
1500
x2533
48C
The Race
math
1800
x786
48B
Land Lot
brute force
,
implementation
1200
x2700
48A
Rock-paper-scissors
implementation
,
schedules
900
x6261
47E
Cannon
data structures
,
geometry
,
sortings
2200
x370
47D
Safe
brute force
2200
x780
47C
Crossword
implementation
2000
x790
47B
Coins
implementation
1200
x14123
47A
Triangular numbers
brute force
,
math
800
x15207
46G
Emperor's Problem
geometry
2500
x117
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x330
46E
Comb
data structures
,
dp
1900
x965
46D
Parking Lot
data structures
,
implementation
1800
x986
46C
Hamsters and Tigers
two pointers
1600
x2457
46B
T-shirts from Sponsor
implementation
1100
x3709
46A
Ball Game
brute force
,
implementation
800
x8797
45J
Planting Trees
constructive algorithms
1800
x946
45I
TCMCF+++
greedy
1400
x2494
45H
Road Problem
graphs
2100
x193
45G
Prime Problem
number theory
2200
x1051
45F
Goats and Wolves
greedy
2500
x145
45E
Director
constructive algorithms
,
greedy
2000
x551
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1702
45C
Dancing Lessons
data structures
1900
x919
45B
School
dp
,
dsu
2200
x282
45A
Codecraft III
implementation
900
x6797
44J
Triminoes
constructive algorithms
,
greedy
2000
x576
44I
Toys
brute force
,
combinatorics
2300
x195
44H
Phone Number
dp
1700
x1750
44G
Shooting Gallery
data structures
,
implementation
2500
x409
44F
BerPaint
geometry
,
graphs
2700
x68
44E
Anfisa the Monkey
dp
1400
x5198
44D
Hyperdrive
math
1800
x716
44C
Holidays
implementation
1300
x3492
44B
Cola
implementation
1500
x2013
44A
Indian Summer
implementation
900
x11428
43E
Race
brute force
,
implementation
,
two pointers
2300
x396
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1091
43C
Lucky Tickets
greedy
1300
x4289
43B
Letter
implementation
,
strings
1100
x17054
43A
Football
strings
1000
x57212
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x206
42D
Strange town
constructive algorithms
,
math
2300
x412
42C
Safe cracking
brute force
,
constructive algorithms
2200
x488
42B
Game of chess unfinished
implementation
1700
x957
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2860
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1978
41D
Pawn
dp
1900
x2444
41C
Email address
expression parsing
,
implementation
1300
x3772
41B
Martian Dollar
brute force
1400
x4056
41A
Translation
implementation
,
strings
800
x148859
40E
Number Table
combinatorics
2500
x685
40D
Interesting Sequence
math
2600
x142
40C
Berland Square
implementation
,
math
2300
x253
40B
Repaintings
math
1600
x1173
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x4058
39K
Testing
2600
x86
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3006
39I
Tram
2500
x143
39H
Multiplication Table
implementation
1300
x2777
39G
Inverse Function
implementation
2400
x130
39F
Pacifist frogs
implementation
1300
x1576
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x884
39D
Cubical Planet
math
1100
x4008
39C
Moon Craters
dp
,
sortings
2100
x605
39B
Company Income Growth
greedy
1300
x2684
39A
C*++ Calculations
expression parsing
,
greedy
2000
x705
38H
The Great Marathon
dp
2400
x306
38G
Queue
data structures
2300
x709
38F
Smart Boy
dp
,
games
,
strings
2100
x392
38E
Let's Go Rolling!
dp
,
sortings
1800
x2589
38D
Vasya the Architect
implementation
1900
x500
38C
Blinds
brute force
1400
x2186
38B
Chess
brute force
,
implementation
,
math
1200
x3547
38A
Army
implementation
800
x21513
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x622
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x419
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1735
37B
Computer Game
greedy
,
implementation
1800
x926
37A
Towers
sortings
1000
x24634
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x534
36D
New Game with a Chess Piece
games
2300
x710
36C
Bowls
geometry
,
implementation
2200
x340
36B
Fractal
implementation
1600
x1515
36A
Extra-terrestrial Intelligence
implementation
1300
x3026
35E
Parade
data structures
,
sortings
2100
x750
35D
Animals
dp
,
greedy
1700
x3369
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6934
35B
Warehouse
implementation
1700
x1022
35A
Shell Game
implementation
1000
x6848
34E
Collisions
brute force
,
implementation
,
math
2000
x592
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