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Before contest
Codeforces Round 954 (Div. 3)
5 days
→ Filter Problems
Difficulty:
—
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
Standings
Custom test
Problems
#
Name
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2771
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1910
41D
Pawn
dp
1900
x2208
41C
Email address
expression parsing
,
implementation
1300
x3662
41B
Martian Dollar
brute force
1400
x3900
41A
Translation
implementation
,
strings
800
x137443
40E
Number Table
combinatorics
2500
x659
40D
Interesting Sequence
math
2600
x128
40C
Berland Square
implementation
,
math
2300
x243
40B
Repaintings
math
1600
x1126
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3916
39K
Testing
2600
x84
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2846
39I
Tram
2500
x124
39H
Multiplication Table
implementation
1300
x2629
39G
Inverse Function
implementation
2400
x125
39F
Pacifist frogs
implementation
1300
x1509
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x859
39D
Cubical Planet
math
1100
x3792
39C
Moon Craters
dp
,
sortings
2100
x572
39B
Company Income Growth
greedy
1300
x2580
39A
C*++ Calculations
expression parsing
,
greedy
2000
x658
38H
The Great Marathon
dp
2400
x267
38G
Queue
data structures
2300
x684
38F
Smart Boy
dp
,
games
,
strings
2100
x379
38E
Let's Go Rolling!
dp
,
sortings
1800
x2514
38D
Vasya the Architect
implementation
1900
x479
38C
Blinds
brute force
1400
x2100
38B
Chess
brute force
,
implementation
,
math
1200
x3431
38A
Army
implementation
800
x20673
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x590
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x390
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1574
37B
Computer Game
greedy
,
implementation
1800
x872
37A
Towers
sortings
1000
x23788
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x500
36D
New Game with a Chess Piece
games
2300
x681
36C
Bowls
geometry
,
implementation
2200
x330
36B
Fractal
implementation
1600
x1442
36A
Extra-terrestrial Intelligence
implementation
1300
x2918
35E
Parade
data structures
,
sortings
2100
x707
35D
Animals
dp
,
greedy
1700
x3184
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6516
35B
Warehouse
implementation
1700
x995
35A
Shell Game
implementation
1000
x6663
34E
Collisions
brute force
,
implementation
,
math
2000
x567
34D
Road Map
dfs and similar
,
graphs
1600
x4893
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4108
34B
Sale
greedy
,
sortings
900
x49572
34A
Reconnaissance 2
implementation
800
x28811
33E
Helper
2600
x124
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1145
33C
Wonderful Randomized Sum
greedy
1800
x2895
33B
String Problem
shortest paths
1800
x4205
33A
What is for dinner?
greedy
,
implementation
1200
x3902
32E
Hide-and-Seek
geometry
,
implementation
2400
x324
32D
Constellation
implementation
1600
x1248
32C
Flea
math
1700
x2079
32B
Borze
expression parsing
,
implementation
800
x59947
32A
Reconnaissance
brute force
800
x12111
31E
TV Game
dp
2400
x1037
31D
Chocolate
dfs and similar
,
implementation
2000
x1002
31C
Schedule
implementation
1700
x1747
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4148
31A
Worms Evolution
implementation
1200
x10014
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x684
30D
King's Problem?
geometry
,
greedy
2600
x413
30C
Shooting Gallery
dp
,
probabilities
1800
x1869
30B
Codeforces World Finals
implementation
1700
x1157
30A
Accounting
brute force
,
math
1400
x3347
29E
Quarrel
graphs
,
shortest paths
2400
x871
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2351
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4624
29B
Traffic Lights
implementation
1500
x2856
29A
Spit Problem
brute force
1000
x6878
28E
DravDe saves the world
geometry
,
math
2800
x87
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x591
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x994
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4444
28A
Bender Problem
implementation
1600
x773
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x4026
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2388
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2705
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5186
27A
Next Test
implementation
,
sortings
1200
x19524
26E
Multithreading
constructive algorithms
2400
x368
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x763
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x826
26B
Regular Bracket Sequence
greedy
1400
x17838
26A
Almost Prime
number theory
900
x29149
25E
Test
hashing
,
strings
2200
x2238
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10577
25C
Roads in Berland
graphs
,
shortest paths
1900
x5944
25B
Phone numbers
implementation
1100
x9407
25A
IQ test
brute force
1300
x82429
24E
Berland collider
binary search
2300
x869
24D
Broken robot
dp
,
math
,
probabilities
2400
x1815
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1220
24B
F1 Champions
implementation
1500
x1732
24A
Ring road
graphs
1400
x4870
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