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Before contest
Codeforces Round 973 (Div. 2)
13:44:14
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→ Filter Problems
Difficulty:
—
implementation
combine-tags-by-or
*combine tags by OR
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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Custom test
Problems
#
Name
64A
Factorial
*special problem
,
implementation
1300
x2795
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x752
63C
Bulls and Cows
brute force
,
implementation
1700
x1674
63B
Settlers' Training
implementation
1200
x4812
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11294
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x251
62B
Tyndex.Brome
binary search
,
implementation
1800
x1284
61A
Ultra-Fast Mathematician
implementation
800
x109555
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3603
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x625
59B
Fortune Telling
implementation
,
number theory
1200
x6846
59A
Word
implementation
,
strings
800
x173264
57B
Martian Architecture
implementation
1600
x1011
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2887
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1150
56B
Spoilt Permutation
implementation
1300
x3716
56A
Bar
implementation
1000
x8599
55A
Flea travel
implementation
,
math
1200
x3397
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x757
54A
Presents
implementation
1300
x2062
53B
Blog Photo
binary search
,
implementation
1700
x1401
53A
Autocomplete
implementation
1100
x5025
52A
123-sequence
implementation
900
x8614
51D
Geometrical problem
implementation
2200
x477
51A
Cheaterius's Problem
implementation
1300
x1813
49D
Game
brute force
,
dp
,
implementation
1800
x1895
49A
Sleuth
implementation
800
x13351
48B
Land Lot
brute force
,
implementation
1200
x2665
48A
Rock-paper-scissors
implementation
,
schedules
900
x6152
47C
Crossword
implementation
2000
x780
47B
Coins
implementation
1200
x13846
46D
Parking Lot
data structures
,
implementation
1800
x973
46B
T-shirts from Sponsor
implementation
1100
x3647
46A
Ball Game
brute force
,
implementation
800
x8652
45A
Codecraft III
implementation
900
x6659
44G
Shooting Gallery
data structures
,
implementation
2500
x403
44C
Holidays
implementation
1300
x3335
44B
Cola
implementation
1500
x1964
44A
Indian Summer
implementation
900
x10688
43E
Race
brute force
,
implementation
,
two pointers
2300
x393
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1076
43B
Letter
implementation
,
strings
1100
x16675
42B
Game of chess unfinished
implementation
1700
x938
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2828
41C
Email address
expression parsing
,
implementation
1300
x3743
41A
Translation
implementation
,
strings
800
x143670
40C
Berland Square
implementation
,
math
2300
x247
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3981
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2949
39H
Multiplication Table
implementation
1300
x2723
39G
Inverse Function
implementation
2400
x126
39F
Pacifist frogs
implementation
1300
x1546
38D
Vasya the Architect
implementation
1900
x491
38B
Chess
brute force
,
implementation
,
math
1200
x3512
38A
Army
implementation
800
x21036
37B
Computer Game
greedy
,
implementation
1800
x890
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x519
36C
Bowls
geometry
,
implementation
2200
x338
36B
Fractal
implementation
1600
x1480
36A
Extra-terrestrial Intelligence
implementation
1300
x2985
35B
Warehouse
implementation
1700
x1008
35A
Shell Game
implementation
1000
x6796
34E
Collisions
brute force
,
implementation
,
math
2000
x584
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4213
34A
Reconnaissance 2
implementation
800
x29674
33A
What is for dinner?
greedy
,
implementation
1200
x4038
32E
Hide-and-Seek
geometry
,
implementation
2400
x335
32D
Constellation
implementation
1600
x1275
32B
Borze
expression parsing
,
implementation
800
x63004
31D
Chocolate
dfs and similar
,
implementation
2000
x1034
31C
Schedule
implementation
1700
x1784
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4257
31A
Worms Evolution
implementation
1200
x10254
30B
Codeforces World Finals
implementation
1700
x1187
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4867
29B
Traffic Lights
implementation
1500
x2941
28A
Bender Problem
implementation
1600
x791
27A
Next Test
implementation
,
sortings
1200
x20086
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x849
25B
Phone numbers
implementation
1100
x9646
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1248
24B
F1 Champions
implementation
1500
x1771
21B
Intersection
implementation
,
math
2000
x1340
21A
Jabber ID
implementation
,
strings
1900
x1845
20A
BerOS file system
implementation
1700
x6164
19A
World Football Cup
implementation
1400
x2735
18C
Stripe
data structures
,
implementation
1200
x13053
16D
Logging
implementation
,
strings
1900
x1562
16B
Burglar and Matches
greedy
,
implementation
,
sortings
900
x17830
16A
Flag
implementation
800
x14234
15D
Map
data structures
,
implementation
,
sortings
2500
x757
15A
Cottage Village
implementation
,
sortings
1200
x3903
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3331
14B
Young Photographer
implementation
1000
x7050
14A
Letter
implementation
800
x10564
13B
Letter A
geometry
,
implementation
2000
x992
13A
Numbers
implementation
,
math
1000
x7742
12C
Fruits
greedy
,
implementation
,
sortings
1100
x6160
12B
Correct Solution?
implementation
,
sortings
1100
x8474
12A
Super Agent
implementation
800
x12991
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