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Codeforces Round 954 (Div. 3)
3 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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Problems
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Status
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Custom test
Problems
#
Name
59B
Fortune Telling
implementation
,
number theory
1200
x6740
59A
Word
implementation
,
strings
800
x165386
58E
Expression
dp
2400
x349
58D
Calendar
greedy
,
strings
2000
x715
58C
Trees
brute force
1800
x1979
58B
Coins
greedy
1300
x11916
58A
Chat room
greedy
,
strings
1000
x124200
57E
Chess
math
,
shortest paths
3000
x252
57D
Journey
dp
,
math
2500
x333
57C
Array
combinatorics
,
math
1900
x2392
57B
Martian Architecture
implementation
1600
x993
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2826
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2247
56D
Changing a String
dp
2100
x1549
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1127
56B
Spoilt Permutation
implementation
1300
x3645
56A
Bar
implementation
1000
x8394
55E
Very simple problem
geometry
,
two pointers
2500
x679
55D
Beautiful numbers
dp
,
number theory
2500
x3646
55C
Pie or die
games
1900
x1603
55B
Smallest number
brute force
1600
x2663
55A
Flea travel
implementation
,
math
1200
x3350
54E
Vacuum Сleaner
geometry
2700
x188
54D
Writing a Song
brute force
,
dp
,
strings
2100
x517
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1254
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x744
54A
Presents
implementation
1300
x2022
53E
Dead Ends
bitmasks
,
dp
2500
x916
53D
Physical Education
sortings
1500
x1962
53C
Little Frog
constructive algorithms
1200
x6255
53B
Blog Photo
binary search
,
implementation
1700
x1381
53A
Autocomplete
implementation
1100
x4882
52C
Circular RMQ
data structures
2200
x8462
52B
Right Triangles
combinatorics
1600
x1996
52A
123-sequence
implementation
900
x8404
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x551
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x370
51D
Geometrical problem
implementation
2200
x419
51C
Three Base Stations
binary search
,
greedy
1800
x1835
51B
bHTML Tables Analisys
expression parsing
1700
x852
51A
Cheaterius's Problem
implementation
1300
x1788
50E
Square Equation Roots
math
2300
x347
50D
Bombing
binary search
,
dp
,
probabilities
2100
x605
50C
Happy Farm 5
geometry
2000
x738
50B
Choosing Symbol Pairs
strings
1500
x5576
50A
Domino piling
greedy
,
math
800
x232902
49E
Common ancestor
dp
2300
x651
49D
Game
brute force
,
dp
,
implementation
1800
x1853
49C
Disposition
constructive algorithms
,
math
1700
x1659
49B
Sum
math
1500
x2410
49A
Sleuth
implementation
800
x13021
48H
Black and White
constructive algorithms
2800
x137
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x255
48F
Snow sellers
greedy
,
sortings
2800
x140
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x566
48D
Permutations
greedy
1500
x2427
48C
The Race
math
1800
x761
48B
Land Lot
brute force
,
implementation
1200
x2627
48A
Rock-paper-scissors
implementation
,
schedules
900
x5774
47E
Cannon
data structures
,
geometry
,
sortings
2200
x358
47D
Safe
brute force
2200
x753
47C
Crossword
implementation
2000
x756
47B
Coins
implementation
1200
x13240
47A
Triangular numbers
brute force
,
math
800
x14540
46G
Emperor's Problem
geometry
2500
x110
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x311
46E
Comb
data structures
,
dp
1900
x929
46D
Parking Lot
data structures
,
implementation
1800
x962
46C
Hamsters and Tigers
two pointers
1600
x2279
46B
T-shirts from Sponsor
implementation
1100
x3577
46A
Ball Game
brute force
,
implementation
800
x8441
45J
Planting Trees
constructive algorithms
1800
x917
45I
TCMCF+++
greedy
1400
x2327
45H
Road Problem
graphs
2100
x178
45G
Prime Problem
number theory
2200
x1002
45F
Goats and Wolves
greedy
2500
x126
45E
Director
constructive algorithms
,
greedy
2000
x528
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1610
45C
Dancing Lessons
data structures
1900
x862
45B
School
dp
,
dsu
2200
x269
45A
Codecraft III
implementation
900
x6461
44J
Triminoes
constructive algorithms
,
greedy
2000
x557
44I
Toys
brute force
,
combinatorics
2300
x184
44H
Phone Number
dp
1700
x1688
44G
Shooting Gallery
data structures
,
implementation
2500
x370
44F
BerPaint
geometry
,
graphs
2700
x65
44E
Anfisa the Monkey
dp
1400
x4899
44D
Hyperdrive
math
1800
x695
44C
Holidays
implementation
1300
x3245
44B
Cola
implementation
1500
x1918
44A
Indian Summer
implementation
900
x9772
43E
Race
brute force
,
implementation
,
two pointers
2300
x384
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1060
43C
Lucky Tickets
greedy
1300
x4173
43B
Letter
implementation
,
strings
1100
x15922
43A
Football
strings
1000
x53259
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x197
42D
Strange town
constructive algorithms
,
math
2300
x390
42C
Safe cracking
brute force
,
constructive algorithms
2200
x457
42B
Game of chess unfinished
implementation
1700
x927
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