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Codeforces Round 952 (Div. 4)
05:35:40
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combine-tags-by-or
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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
#
Name
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6296
61B
Hard Work
strings
1300
x3799
60B
Serial Time!
dfs and similar
,
dsu
1400
x4467
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3540
59C
Title
expression parsing
1600
x2019
58C
Trees
brute force
1800
x1977
58B
Coins
greedy
1300
x11897
57C
Array
combinatorics
,
math
1900
x2368
57B
Martian Architecture
implementation
1600
x990
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2823
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1125
56B
Spoilt Permutation
implementation
1300
x3638
55C
Pie or die
games
1900
x1600
55B
Smallest number
brute force
1600
x2653
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x743
54A
Presents
implementation
1300
x2019
53D
Physical Education
sortings
1500
x1953
53B
Blog Photo
binary search
,
implementation
1700
x1375
52B
Right Triangles
combinatorics
1600
x1992
51C
Three Base Stations
binary search
,
greedy
1800
x1829
51B
bHTML Tables Analisys
expression parsing
1700
x851
51A
Cheaterius's Problem
implementation
1300
x1787
50B
Choosing Symbol Pairs
strings
1500
x5569
49D
Game
brute force
,
dp
,
implementation
1800
x1847
49C
Disposition
constructive algorithms
,
math
1700
x1652
49B
Sum
math
1500
x2404
48D
Permutations
greedy
1500
x2422
48C
The Race
math
1800
x759
46E
Comb
data structures
,
dp
1900
x929
46D
Parking Lot
data structures
,
implementation
1800
x962
46C
Hamsters and Tigers
two pointers
1600
x2266
45J
Planting Trees
constructive algorithms
1800
x917
45I
TCMCF+++
greedy
1400
x2322
45D
Event Dates
greedy
,
meet-in-the-middle
,
sortings
1900
x1610
45C
Dancing Lessons
data structures
1900
x862
44H
Phone Number
dp
1700
x1685
44E
Anfisa the Monkey
dp
1400
x4885
44D
Hyperdrive
math
1800
x695
44C
Holidays
implementation
1300
x3241
44B
Cola
implementation
1500
x1912
43C
Lucky Tickets
greedy
1300
x4166
42B
Game of chess unfinished
implementation
1700
x925
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2768
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1907
41D
Pawn
dp
1900
x2202
41C
Email address
expression parsing
,
implementation
1300
x3656
41B
Martian Dollar
brute force
1400
x3893
40B
Repaintings
math
1600
x1123
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3876
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2838
39H
Multiplication Table
implementation
1300
x2622
39F
Pacifist frogs
implementation
1300
x1505
39B
Company Income Growth
greedy
1300
x2576
38E
Let's Go Rolling!
dp
,
sortings
1800
x2507
38D
Vasya the Architect
implementation
1900
x479
38C
Blinds
brute force
1400
x2097
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1567
37B
Computer Game
greedy
,
implementation
1800
x871
36B
Fractal
implementation
1600
x1437
36A
Extra-terrestrial Intelligence
implementation
1300
x2912
35D
Animals
dp
,
greedy
1700
x3177
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6497
35B
Warehouse
implementation
1700
x995
34D
Road Map
dfs and similar
,
graphs
1600
x4887
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4100
33C
Wonderful Randomized Sum
greedy
1800
x2891
33B
String Problem
shortest paths
1800
x4134
32D
Constellation
implementation
1600
x1246
32C
Flea
math
1700
x2072
31C
Schedule
implementation
1700
x1745
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4142
30C
Shooting Gallery
dp
,
probabilities
1800
x1866
30B
Codeforces World Finals
implementation
1700
x1157
30A
Accounting
brute force
,
math
1400
x3345
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4611
29B
Traffic Lights
implementation
1500
x2854
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4438
28A
Bender Problem
implementation
1600
x773
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2704
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5180
26B
Regular Bracket Sequence
greedy
1400
x17781
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10542
25C
Roads in Berland
graphs
,
shortest paths
1900
x5929
25A
IQ test
brute force
1300
x82217
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1220
24B
F1 Champions
implementation
1500
x1728
24A
Ring road
graphs
1400
x4841
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3217
22D
Segments
greedy
,
sortings
1900
x2634
22C
System Administrator
graphs
1700
x2975
22B
Bargaining Table
brute force
,
dp
1500
x4103
21A
Jabber ID
implementation
,
strings
1900
x1792
20C
Dijkstra?
graphs
,
shortest paths
1900
x30751
20A
BerOS file system
implementation
1700
x5994
19B
Checkout Assistant
dp
1900
x4485
19A
World Football Cup
implementation
1400
x2653
18B
Platforms
brute force
,
math
1700
x2075
18A
Triangle
brute force
,
geometry
1500
x5736
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4531
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x4719
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