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Codeforces Round 973 (Div. 2)
13:43:25
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Difficulty:
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greedy
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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Custom test
Problems
#
Name
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x402
182C
Optimal Sum
data structures
,
greedy
2000
x722
180D
Name
greedy
,
strings
1900
x722
178A3
Educational Game
greedy
1100
x1429
178A2
Educational Game
greedy
1000
x1615
176A
Trading Business
greedy
,
sortings
1200
x1454
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x264
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1306
174C
Range Increments
data structures
,
greedy
1800
x1082
174B
File List
dp
,
greedy
,
implementation
1400
x2228
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x248
169B
Replacing Digits
greedy
1100
x3270
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x193
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x355
166C
Median
greedy
,
math
,
sortings
1500
x6467
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1952
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4850
160B
Unlucky Ticket
greedy
,
sortings
1100
x13901
160A
Twins
greedy
,
sortings
900
x116499
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x997
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3774
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2479
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x86024
155B
Combination
greedy
,
sortings
1100
x10164
154A
Hometask
greedy
1600
x4037
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5368
149A
Business trip
greedy
,
implementation
,
sortings
900
x39443
148C
Terse princess
constructive algorithms
,
greedy
1700
x3105
145A
Lucky Conversion
greedy
,
implementation
1200
x7120
144E
Competition
data structures
,
greedy
2200
x581
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2201
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2425
140D
New Year Contest
greedy
,
sortings
1800
x2204
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4349
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1675
138B
Digits Permutations
greedy
1900
x1025
137B
Permutation
greedy
1000
x13625
135C
Zero-One
constructive algorithms
,
games
,
greedy
1900
x1335
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7525
134C
Swaps
constructive algorithms
,
graphs
,
greedy
2200
x471
132D
Constants in the language of Shakespeare
constructive algorithms
,
dp
,
greedy
2100
x613
126C
E-reader Display
constructive algorithms
,
greedy
2000
x723
125D
Two progressions
constructive algorithms
,
greedy
2200
x400
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x915
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x603
120I
Luck is in Numbers
greedy
2200
x304
120F
Spiders
dp
,
greedy
,
trees
1400
x3570
118C
Fancy Number
brute force
,
greedy
,
sortings
,
strings
1900
x2578
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13700
115B
Lawnmower
greedy
,
sortings
1500
x2585
111A
Petya and Inequiations
greedy
1400
x4740
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x949
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5960
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x682
101A
Homework
greedy
1200
x3789
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x62
95B
Lucky Numbers
dp
,
greedy
1800
x1210
93B
End of Exams
greedy
1900
x912
92B
Binary Number
greedy
1300
x4787
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x270
91A
Newspaper Headline
greedy
,
strings
1500
x3584
90A
Cableway
greedy
,
math
1000
x4667
89E
Fire and Ice
greedy
2900
x99
89A
Robbery
greedy
1800
x1470
86B
Tetris revisited
constructive algorithms
,
graph matchings
,
greedy
,
math
2200
x411
85B
Embassy Queue
data structures
,
greedy
1800
x968
83C
Track
graphs
,
greedy
,
shortest paths
2400
x416
81D
Polycarp's Picture Gallery
constructive algorithms
,
greedy
2100
x644
81C
Average Score
greedy
,
math
,
sortings
1700
x1659
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1775
79A
Bus Game
greedy
1200
x4041
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x998
76D
Plus and xor
dp
,
greedy
,
math
1700
x2057
76B
Mice
greedy
,
two pointers
2100
x744
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1789
74B
Train
dp
,
games
,
greedy
1500
x1537
73D
FreeDiv
dfs and similar
,
graphs
,
greedy
2200
x636
73B
Need For Brake
binary search
,
greedy
,
sortings
2000
x494
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1333
72F
Oil
*special problem
,
greedy
,
math
1900
x118
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x185
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1760
69B
Bets
greedy
,
implementation
1200
x3246
67B
Restoration of the Permutation
greedy
1800
x763
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2109
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1341
64D
Presents
*special problem
,
greedy
1800
x287
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x337
62A
A Student's Dream
greedy
,
math
1300
x3434
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6517
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x625
58D
Calendar
greedy
,
strings
2000
x726
58B
Coins
greedy
1300
x12171
58A
Chat room
greedy
,
strings
1000
x128613
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2887
51C
Three Base Stations
binary search
,
greedy
1800
x1928
50A
Domino piling
greedy
,
math
800
x243080
48F
Snow sellers
greedy
,
sortings
2800
x154
48D
Permutations
greedy
1500
x2496
45I
TCMCF+++
greedy
1400
x2382
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