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Rayan
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Before contest
Codeforces Round 998 (Div. 3)
09:34:47
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Difficulty:
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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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Problems
#
Name
44F
BerPaint
geometry
,
graphs
2700
x69
44E
Anfisa the Monkey
dp
1400
x5307
44D
Hyperdrive
math
1800
x722
44C
Holidays
implementation
1300
x3536
44B
Cola
implementation
1500
x2047
44A
Indian Summer
implementation
900
x11895
43E
Race
brute force
,
implementation
,
two pointers
2300
x398
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1117
43C
Lucky Tickets
greedy
1300
x4341
43B
Letter
implementation
,
strings
1100
x17335
43A
Football
strings
1000
x58621
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x209
42D
Strange town
constructive algorithms
,
math
2300
x414
42C
Safe cracking
brute force
,
constructive algorithms
2200
x493
42B
Game of chess unfinished
implementation
1700
x958
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2878
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1990
41D
Pawn
dp
1900
x2474
41C
Email address
expression parsing
,
implementation
1300
x3807
41B
Martian Dollar
brute force
1400
x4095
41A
Translation
implementation
,
strings
800
x153747
40E
Number Table
combinatorics
2500
x689
40D
Interesting Sequence
math
2600
x143
40C
Berland Square
implementation
,
math
2300
x256
40B
Repaintings
math
1600
x1189
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x4099
39K
Testing
2600
x86
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3046
39I
Tram
2500
x144
39H
Multiplication Table
implementation
1300
x2805
39G
Inverse Function
implementation
2400
x130
39F
Pacifist frogs
implementation
1300
x1605
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x890
39D
Cubical Planet
math
1100
x4073
39C
Moon Craters
dp
,
sortings
2100
x613
39B
Company Income Growth
greedy
1300
x2718
39A
C*++ Calculations
expression parsing
,
greedy
2000
x717
38H
The Great Marathon
dp
2400
x315
38G
Queue
data structures
2300
x712
38F
Smart Boy
dp
,
games
,
strings
2100
x395
38E
Let's Go Rolling!
dp
,
sortings
1800
x2627
38D
Vasya the Architect
implementation
1900
x555
38C
Blinds
brute force
1400
x2268
38B
Chess
brute force
,
implementation
,
math
1200
x3588
38A
Army
implementation
800
x21934
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x632
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x423
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1751
37B
Computer Game
greedy
,
implementation
1800
x971
37A
Towers
sortings
1000
x24928
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x542
36D
New Game with a Chess Piece
games
2300
x716
36C
Bowls
geometry
,
implementation
2200
x341
36B
Fractal
implementation
1600
x1534
36A
Extra-terrestrial Intelligence
implementation
1300
x3059
35E
Parade
data structures
,
sortings
2100
x760
35D
Animals
dp
,
greedy
1700
x3416
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x7060
35B
Warehouse
implementation
1700
x1032
35A
Shell Game
implementation
1000
x6896
34E
Collisions
brute force
,
implementation
,
math
2000
x594
34D
Road Map
dfs and similar
,
graphs
1600
x5305
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4315
34B
Sale
greedy
,
sortings
900
x54674
34A
Reconnaissance 2
implementation
800
x30820
33E
Helper
2600
x132
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1244
33C
Wonderful Randomized Sum
greedy
1800
x3060
33B
String Problem
shortest paths
1800
x4701
33A
What is for dinner?
greedy
,
implementation
1200
x4192
32E
Hide-and-Seek
geometry
,
implementation
2400
x345
32D
Constellation
implementation
1600
x1299
32C
Flea
math
1700
x2198
32B
Borze
expression parsing
,
implementation
800
x66560
32A
Reconnaissance
brute force
800
x12924
31E
TV Game
dp
2400
x1123
31D
Chocolate
dfs and similar
,
implementation
2000
x1051
31C
Schedule
implementation
1700
x1846
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4382
31A
Worms Evolution
implementation
1200
x10510
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x751
30D
King's Problem?
geometry
,
greedy
2600
x457
30C
Shooting Gallery
dp
,
probabilities
1800
x2002
30B
Codeforces World Finals
implementation
1700
x1214
30A
Accounting
brute force
,
math
1400
x3533
29E
Quarrel
graphs
,
shortest paths
2400
x939
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2520
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x5138
29B
Traffic Lights
implementation
1500
x3012
29A
Spit Problem
brute force
1000
x7248
28E
DravDe saves the world
geometry
,
math
2800
x94
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x622
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x1072
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4784
28A
Bender Problem
implementation
1600
x809
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x4306
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2597
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2829
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5434
27A
Next Test
implementation
,
sortings
1200
x20743
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