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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
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Problems
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Name
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x188
42D
Strange town
constructive algorithms
,
math
2300
x386
42C
Safe cracking
brute force
,
constructive algorithms
2200
x445
42B
Game of chess unfinished
implementation
1700
x921
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2743
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1902
41D
Pawn
dp
1900
x2180
41C
Email address
expression parsing
,
implementation
1300
x3638
41B
Martian Dollar
brute force
1400
x3866
41A
Translation
implementation
,
strings
800
x134990
40E
Number Table
combinatorics
2500
x654
40D
Interesting Sequence
math
2600
x124
40C
Berland Square
implementation
,
math
2300
x239
40B
Repaintings
math
1600
x1112
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3843
39K
Testing
2600
x82
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2788
39I
Tram
2500
x122
39H
Multiplication Table
implementation
1300
x2608
39G
Inverse Function
implementation
2400
x123
39F
Pacifist frogs
implementation
1300
x1487
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x853
39D
Cubical Planet
math
1100
x3743
39C
Moon Craters
dp
,
sortings
2100
x569
39B
Company Income Growth
greedy
1300
x2561
39A
C*++ Calculations
expression parsing
,
greedy
2000
x656
38H
The Great Marathon
dp
2400
x263
38G
Queue
data structures
2300
x673
38F
Smart Boy
dp
,
games
,
strings
2100
x375
38E
Let's Go Rolling!
dp
,
sortings
1800
x2483
38D
Vasya the Architect
implementation
1900
x477
38C
Blinds
brute force
1400
x2084
38B
Chess
brute force
,
implementation
,
math
1200
x3389
38A
Army
implementation
800
x20523
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x583
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x388
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1498
37B
Computer Game
greedy
,
implementation
1800
x861
37A
Towers
sortings
1000
x23564
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x495
36D
New Game with a Chess Piece
games
2300
x676
36C
Bowls
geometry
,
implementation
2200
x297
36B
Fractal
implementation
1600
x1417
36A
Extra-terrestrial Intelligence
implementation
1300
x2896
35E
Parade
data structures
,
sortings
2100
x701
35D
Animals
dp
,
greedy
1700
x3148
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6257
35B
Warehouse
implementation
1700
x988
35A
Shell Game
implementation
1000
x6613
34E
Collisions
brute force
,
implementation
,
math
2000
x563
34D
Road Map
dfs and similar
,
graphs
1600
x4854
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4069
34B
Sale
greedy
,
sortings
900
x48658
34A
Reconnaissance 2
implementation
800
x28461
33E
Helper
2600
x121
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1130
33C
Wonderful Randomized Sum
greedy
1800
x2854
33B
String Problem
shortest paths
1800
x4077
33A
What is for dinner?
greedy
,
implementation
1200
x3848
32E
Hide-and-Seek
geometry
,
implementation
2400
x321
32D
Constellation
implementation
1600
x1237
32C
Flea
math
1700
x2052
32B
Borze
expression parsing
,
implementation
800
x58731
32A
Reconnaissance
brute force
800
x12001
31E
TV Game
dp
2400
x1024
31D
Chocolate
dfs and similar
,
implementation
2000
x988
31C
Schedule
implementation
1700
x1722
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4103
31A
Worms Evolution
implementation
1200
x9927
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x673
30D
King's Problem?
geometry
,
greedy
2600
x410
30C
Shooting Gallery
dp
,
probabilities
1800
x1850
30B
Codeforces World Finals
implementation
1700
x1149
30A
Accounting
brute force
,
math
1400
x3314
29E
Quarrel
graphs
,
shortest paths
2400
x860
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2308
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4552
29B
Traffic Lights
implementation
1500
x2828
29A
Spit Problem
brute force
1000
x6823
28E
DravDe saves the world
geometry
,
math
2800
x85
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x982
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4399
28A
Bender Problem
implementation
1600
x769
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x3994
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2360
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2692
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5138
27A
Next Test
implementation
,
sortings
1200
x19312
26E
Multithreading
constructive algorithms
2400
x362
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x746
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x822
26B
Regular Bracket Sequence
greedy
1400
x17503
26A
Almost Prime
number theory
900
x28539
25E
Test
hashing
,
strings
2200
x2183
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10356
25C
Roads in Berland
graphs
,
shortest paths
1900
x5859
25B
Phone numbers
implementation
1100
x9294
25A
IQ test
brute force
1300
x81127
24E
Berland collider
binary search
2300
x857
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