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Codeforces Round 973 (Div. 2)
11:41:08
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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
57C
Array
combinatorics
,
math
1900
x2563
57B
Martian Architecture
implementation
1600
x1011
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2887
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2306
56D
Changing a String
dp
2100
x1605
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1150
56B
Spoilt Permutation
implementation
1300
x3716
56A
Bar
implementation
1000
x8599
55E
Very simple problem
geometry
,
two pointers
2500
x700
55D
Beautiful numbers
dp
,
number theory
2500
x3870
55C
Pie or die
games
1900
x1628
55B
Smallest number
brute force
1600
x2835
55A
Flea travel
implementation
,
math
1200
x3397
54E
Vacuum Сleaner
geometry
2700
x190
54D
Writing a Song
brute force
,
dp
,
strings
2100
x536
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1300
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x757
54A
Presents
implementation
1300
x2062
53E
Dead Ends
bitmasks
,
dp
2500
x973
53D
Physical Education
sortings
1500
x2011
53C
Little Frog
constructive algorithms
1200
x6413
53B
Blog Photo
binary search
,
implementation
1700
x1401
53A
Autocomplete
implementation
1100
x5025
52C
Circular RMQ
data structures
2200
x8833
52B
Right Triangles
combinatorics
1600
x2033
52A
123-sequence
implementation
900
x8614
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x566
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x403
51D
Geometrical problem
implementation
2200
x477
51C
Three Base Stations
binary search
,
greedy
1800
x1928
51B
bHTML Tables Analisys
expression parsing
1700
x867
51A
Cheaterius's Problem
implementation
1300
x1813
50E
Square Equation Roots
math
2300
x357
50D
Bombing
binary search
,
dp
,
probabilities
2100
x619
50C
Happy Farm 5
geometry
2000
x762
50B
Choosing Symbol Pairs
strings
1500
x5656
50A
Domino piling
greedy
,
math
800
x243088
49E
Common ancestor
dp
2300
x661
49D
Game
brute force
,
dp
,
implementation
1800
x1895
49C
Disposition
constructive algorithms
,
math
1700
x1683
49B
Sum
math
1500
x2463
49A
Sleuth
implementation
800
x13352
48H
Black and White
constructive algorithms
2800
x146
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x267
48F
Snow sellers
greedy
,
sortings
2800
x154
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x578
48D
Permutations
greedy
1500
x2496
48C
The Race
math
1800
x777
48B
Land Lot
brute force
,
implementation
1200
x2666
48A
Rock-paper-scissors
implementation
,
schedules
900
x6152
47E
Cannon
data structures
,
geometry
,
sortings
2200
x364
47D
Safe
brute force
2200
x765
47C
Crossword
implementation
2000
x780
47B
Coins
implementation
1200
x13846
47A
Triangular numbers
brute force
,
math
800
x14957
46G
Emperor's Problem
geometry
2500
x115
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x323
46E
Comb
data structures
,
dp
1900
x955
46D
Parking Lot
data structures
,
implementation
1800
x973
46C
Hamsters and Tigers
two pointers
1600
x2415
46B
T-shirts from Sponsor
implementation
1100
x3647
46A
Ball Game
brute force
,
implementation
800
x8652
45J
Planting Trees
constructive algorithms
1800
x932
45I
TCMCF+++
greedy
1400
x2382
45H
Road Problem
graphs
2100
x186
45G
Prime Problem
number theory
2200
x1035
45F
Goats and Wolves
greedy
2500
x131
45E
Director
constructive algorithms
,
greedy
2000
x539
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1679
45C
Dancing Lessons
data structures
1900
x891
45B
School
dp
,
dsu
2200
x274
45A
Codecraft III
implementation
900
x6659
44J
Triminoes
constructive algorithms
,
greedy
2000
x566
44I
Toys
brute force
,
combinatorics
2300
x188
44H
Phone Number
dp
1700
x1730
44G
Shooting Gallery
data structures
,
implementation
2500
x403
44F
BerPaint
geometry
,
graphs
2700
x66
44E
Anfisa the Monkey
dp
1400
x5064
44D
Hyperdrive
math
1800
x707
44C
Holidays
implementation
1300
x3335
44B
Cola
implementation
1500
x1964
44A
Indian Summer
implementation
900
x10689
43E
Race
brute force
,
implementation
,
two pointers
2300
x393
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1076
43C
Lucky Tickets
greedy
1300
x4255
43B
Letter
implementation
,
strings
1100
x16675
43A
Football
strings
1000
x55818
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x202
42D
Strange town
constructive algorithms
,
math
2300
x401
42C
Safe cracking
brute force
,
constructive algorithms
2200
x480
42B
Game of chess unfinished
implementation
1700
x938
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2828
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1947
41D
Pawn
dp
1900
x2350
41C
Email address
expression parsing
,
implementation
1300
x3743
41B
Martian Dollar
brute force
1400
x3994
41A
Translation
implementation
,
strings
800
x143673
40E
Number Table
combinatorics
2500
x674
40D
Interesting Sequence
math
2600
x135
40C
Berland Square
implementation
,
math
2300
x247
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