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Before contest
Codeforces Round (Div. 2)
6 days
→ Filter Problems
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
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Status
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Custom test
Problems
#
Name
46A
Ball Game
brute force
,
implementation
800
x8460
45J
Planting Trees
constructive algorithms
1800
x922
45I
TCMCF+++
greedy
1400
x2331
45H
Road Problem
graphs
2100
x178
45G
Prime Problem
number theory
2200
x1003
45F
Goats and Wolves
greedy
2500
x127
45E
Director
constructive algorithms
,
greedy
2000
x530
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1612
45C
Dancing Lessons
data structures
1900
x864
45B
School
dp
,
dsu
2200
x269
45A
Codecraft III
implementation
900
x6509
44J
Triminoes
constructive algorithms
,
greedy
2000
x558
44I
Toys
brute force
,
combinatorics
2300
x184
44H
Phone Number
dp
1700
x1693
44G
Shooting Gallery
data structures
,
implementation
2500
x373
44F
BerPaint
geometry
,
graphs
2700
x66
44E
Anfisa the Monkey
dp
1400
x4914
44D
Hyperdrive
math
1800
x697
44C
Holidays
implementation
1300
x3252
44B
Cola
implementation
1500
x1924
44A
Indian Summer
implementation
900
x9893
43E
Race
brute force
,
implementation
,
two pointers
2300
x387
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1067
43C
Lucky Tickets
greedy
1300
x4191
43B
Letter
implementation
,
strings
1100
x16028
43A
Football
strings
1000
x53568
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x197
42D
Strange town
constructive algorithms
,
math
2300
x390
42C
Safe cracking
brute force
,
constructive algorithms
2200
x457
42B
Game of chess unfinished
implementation
1700
x927
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2774
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1912
41D
Pawn
dp
1900
x2221
41C
Email address
expression parsing
,
implementation
1300
x3674
41B
Martian Dollar
brute force
1400
x3910
41A
Translation
implementation
,
strings
800
x138268
40E
Number Table
combinatorics
2500
x660
40D
Interesting Sequence
math
2600
x129
40C
Berland Square
implementation
,
math
2300
x243
40B
Repaintings
math
1600
x1128
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3930
39K
Testing
2600
x84
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2865
39I
Tram
2500
x127
39H
Multiplication Table
implementation
1300
x2632
39G
Inverse Function
implementation
2400
x125
39F
Pacifist frogs
implementation
1300
x1511
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x860
39D
Cubical Planet
math
1100
x3812
39C
Moon Craters
dp
,
sortings
2100
x572
39B
Company Income Growth
greedy
1300
x2591
39A
C*++ Calculations
expression parsing
,
greedy
2000
x658
38H
The Great Marathon
dp
2400
x267
38G
Queue
data structures
2300
x686
38F
Smart Boy
dp
,
games
,
strings
2100
x380
38E
Let's Go Rolling!
dp
,
sortings
1800
x2517
38D
Vasya the Architect
implementation
1900
x479
38C
Blinds
brute force
1400
x2104
38B
Chess
brute force
,
implementation
,
math
1200
x3442
38A
Army
implementation
800
x20729
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x600
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x391
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1588
37B
Computer Game
greedy
,
implementation
1800
x872
37A
Towers
sortings
1000
x23864
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x500
36D
New Game with a Chess Piece
games
2300
x684
36C
Bowls
geometry
,
implementation
2200
x330
36B
Fractal
implementation
1600
x1443
36A
Extra-terrestrial Intelligence
implementation
1300
x2926
35E
Parade
data structures
,
sortings
2100
x709
35D
Animals
dp
,
greedy
1700
x3199
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6553
35B
Warehouse
implementation
1700
x995
35A
Shell Game
implementation
1000
x6684
34E
Collisions
brute force
,
implementation
,
math
2000
x574
34D
Road Map
dfs and similar
,
graphs
1600
x4925
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4119
34B
Sale
greedy
,
sortings
900
x49886
34A
Reconnaissance 2
implementation
800
x28932
33E
Helper
2600
x125
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1147
33C
Wonderful Randomized Sum
greedy
1800
x2900
33B
String Problem
shortest paths
1800
x4280
33A
What is for dinner?
greedy
,
implementation
1200
x3915
32E
Hide-and-Seek
geometry
,
implementation
2400
x324
32D
Constellation
implementation
1600
x1250
32C
Flea
math
1700
x2085
32B
Borze
expression parsing
,
implementation
800
x60376
32A
Reconnaissance
brute force
800
x12157
31E
TV Game
dp
2400
x1039
31D
Chocolate
dfs and similar
,
implementation
2000
x1002
31C
Schedule
implementation
1700
x1749
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4158
31A
Worms Evolution
implementation
1200
x10048
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x688
30D
King's Problem?
geometry
,
greedy
2600
x414
30C
Shooting Gallery
dp
,
probabilities
1800
x1877
30B
Codeforces World Finals
implementation
1700
x1158
30A
Accounting
brute force
,
math
1400
x3358
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