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Codeforces Round 1002 (Div. 2)
2 days
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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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Custom test
Problems
#
Name
48F
Snow sellers
greedy
,
sortings
2800
x162
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x606
48D
Permutations
greedy
1500
x2595
48C
The Race
math
1800
x788
47E
Cannon
data structures
,
geometry
,
sortings
2200
x378
47D
Safe
brute force
2200
x815
47C
Crossword
implementation
2000
x794
46G
Emperor's Problem
geometry
2500
x120
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x337
46E
Comb
data structures
,
dp
1900
x966
46D
Parking Lot
data structures
,
implementation
1800
x997
46C
Hamsters and Tigers
two pointers
1600
x2514
45J
Planting Trees
constructive algorithms
1800
x958
45I
TCMCF+++
greedy
1400
x2525
45H
Road Problem
graphs
2100
x198
45G
Prime Problem
number theory
2200
x1062
45F
Goats and Wolves
greedy
2500
x149
45E
Director
constructive algorithms
,
greedy
2000
x556
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1714
45C
Dancing Lessons
data structures
1900
x941
45B
School
dp
,
dsu
2200
x287
44J
Triminoes
constructive algorithms
,
greedy
2000
x580
44I
Toys
brute force
,
combinatorics
2300
x203
44H
Phone Number
dp
1700
x1771
44G
Shooting Gallery
data structures
,
implementation
2500
x437
44F
BerPaint
geometry
,
graphs
2700
x70
44E
Anfisa the Monkey
dp
1400
x5326
44D
Hyperdrive
math
1800
x724
44B
Cola
implementation
1500
x2048
43E
Race
brute force
,
implementation
,
two pointers
2300
x400
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1122
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x210
42D
Strange town
constructive algorithms
,
math
2300
x415
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
x2881
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1992
41D
Pawn
dp
1900
x2480
41B
Martian Dollar
brute force
1400
x4119
40E
Number Table
combinatorics
2500
x690
40D
Interesting Sequence
math
2600
x144
40C
Berland Square
implementation
,
math
2300
x258
40B
Repaintings
math
1600
x1193
39K
Testing
2600
x87
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x3052
39I
Tram
2500
x144
39G
Inverse Function
implementation
2400
x131
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x892
39C
Moon Craters
dp
,
sortings
2100
x623
39A
C*++ Calculations
expression parsing
,
greedy
2000
x717
38H
The Great Marathon
dp
2400
x317
38G
Queue
data structures
2300
x714
38F
Smart Boy
dp
,
games
,
strings
2100
x399
38E
Let's Go Rolling!
dp
,
sortings
1800
x2629
38D
Vasya the Architect
implementation
1900
x555
38C
Blinds
brute force
1400
x2280
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x633
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x426
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1755
37B
Computer Game
greedy
,
implementation
1800
x976
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x544
36D
New Game with a Chess Piece
games
2300
x717
36C
Bowls
geometry
,
implementation
2200
x341
36B
Fractal
implementation
1600
x1542
35E
Parade
data structures
,
sortings
2100
x766
35D
Animals
dp
,
greedy
1700
x3425
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x7081
35B
Warehouse
implementation
1700
x1033
34E
Collisions
brute force
,
implementation
,
math
2000
x595
34D
Road Map
dfs and similar
,
graphs
1600
x5328
33E
Helper
2600
x133
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1248
33C
Wonderful Randomized Sum
greedy
1800
x3090
33B
String Problem
shortest paths
1800
x4711
32E
Hide-and-Seek
geometry
,
implementation
2400
x348
32D
Constellation
implementation
1600
x1311
32C
Flea
math
1700
x2205
31E
TV Game
dp
2400
x1124
31D
Chocolate
dfs and similar
,
implementation
2000
x1054
31C
Schedule
implementation
1700
x1849
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4391
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x753
30D
King's Problem?
geometry
,
greedy
2600
x459
30C
Shooting Gallery
dp
,
probabilities
1800
x2005
30B
Codeforces World Finals
implementation
1700
x1216
30A
Accounting
brute force
,
math
1400
x3546
29E
Quarrel
graphs
,
shortest paths
2400
x944
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2524
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x5172
29B
Traffic Lights
implementation
1500
x3024
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
x1073
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4798
28A
Bender Problem
implementation
1600
x815
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x4343
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2646
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2834
26E
Multithreading
constructive algorithms
2400
x383
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x811
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