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Before contest
Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
22:01:59
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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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Problems
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Status
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Custom test
Problems
#
Name
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1130
55E
Very simple problem
geometry
,
two pointers
2500
x682
55D
Beautiful numbers
dp
,
number theory
2500
x3728
55C
Pie or die
games
1900
x1606
54E
Vacuum Сleaner
geometry
2700
x189
54D
Writing a Song
brute force
,
dp
,
strings
2100
x528
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1260
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x745
53E
Dead Ends
bitmasks
,
dp
2500
x922
53B
Blog Photo
binary search
,
implementation
1700
x1386
52C
Circular RMQ
data structures
2200
x8556
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x552
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x373
51D
Geometrical problem
implementation
2200
x456
51C
Three Base Stations
binary search
,
greedy
1800
x1864
51B
bHTML Tables Analisys
expression parsing
1700
x854
50E
Square Equation Roots
math
2300
x348
50D
Bombing
binary search
,
dp
,
probabilities
2100
x608
50C
Happy Farm 5
geometry
2000
x740
49E
Common ancestor
dp
2300
x652
49D
Game
brute force
,
dp
,
implementation
1800
x1864
49C
Disposition
constructive algorithms
,
math
1700
x1663
48H
Black and White
constructive algorithms
2800
x137
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x256
48F
Snow sellers
greedy
,
sortings
2800
x144
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x569
48C
The Race
math
1800
x765
47E
Cannon
data structures
,
geometry
,
sortings
2200
x358
47D
Safe
brute force
2200
x759
47C
Crossword
implementation
2000
x762
46G
Emperor's Problem
geometry
2500
x110
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x316
46E
Comb
data structures
,
dp
1900
x933
46D
Parking Lot
data structures
,
implementation
1800
x966
45J
Planting Trees
constructive algorithms
1800
x924
45H
Road Problem
graphs
2100
x178
45G
Prime Problem
number theory
2200
x1005
45F
Goats and Wolves
greedy
2500
x127
45E
Director
constructive algorithms
,
greedy
2000
x533
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1643
45C
Dancing Lessons
data structures
1900
x865
45B
School
dp
,
dsu
2200
x271
44J
Triminoes
constructive algorithms
,
greedy
2000
x559
44I
Toys
brute force
,
combinatorics
2300
x185
44H
Phone Number
dp
1700
x1705
44G
Shooting Gallery
data structures
,
implementation
2500
x394
44F
BerPaint
geometry
,
graphs
2700
x66
44D
Hyperdrive
math
1800
x702
43E
Race
brute force
,
implementation
,
two pointers
2300
x388
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1069
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x197
42D
Strange town
constructive algorithms
,
math
2300
x392
42C
Safe cracking
brute force
,
constructive algorithms
2200
x459
42B
Game of chess unfinished
implementation
1700
x930
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1917
41D
Pawn
dp
1900
x2243
40E
Number Table
combinatorics
2500
x660
40D
Interesting Sequence
math
2600
x129
40C
Berland Square
implementation
,
math
2300
x243
39K
Testing
2600
x84
39I
Tram
2500
x127
39G
Inverse Function
implementation
2400
x125
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x862
39C
Moon Craters
dp
,
sortings
2100
x573
39A
C*++ Calculations
expression parsing
,
greedy
2000
x659
38H
The Great Marathon
dp
2400
x268
38G
Queue
data structures
2300
x687
38F
Smart Boy
dp
,
games
,
strings
2100
x380
38E
Let's Go Rolling!
dp
,
sortings
1800
x2525
38D
Vasya the Architect
implementation
1900
x483
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
x1611
37B
Computer Game
greedy
,
implementation
1800
x873
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x502
36D
New Game with a Chess Piece
games
2300
x688
36C
Bowls
geometry
,
implementation
2200
x332
35E
Parade
data structures
,
sortings
2100
x720
35D
Animals
dp
,
greedy
1700
x3229
35B
Warehouse
implementation
1700
x998
34E
Collisions
brute force
,
implementation
,
math
2000
x574
33E
Helper
2600
x126
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1149
33C
Wonderful Randomized Sum
greedy
1800
x2931
33B
String Problem
shortest paths
1800
x4308
32E
Hide-and-Seek
geometry
,
implementation
2400
x324
32C
Flea
math
1700
x2097
31E
TV Game
dp
2400
x1049
31D
Chocolate
dfs and similar
,
implementation
2000
x1006
31C
Schedule
implementation
1700
x1760
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x692
30D
King's Problem?
geometry
,
greedy
2600
x416
30C
Shooting Gallery
dp
,
probabilities
1800
x1895
30B
Codeforces World Finals
implementation
1700
x1164
29E
Quarrel
graphs
,
shortest paths
2400
x875
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2376
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4728
28E
DravDe saves the world
geometry
,
math
2800
x87
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x593
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x1002
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