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Codeforces Round 973 (Div. 2)
29:35:08
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math
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
#
Name
1244A
Pens and Pencils
math
800
x19160
1242D
Number Discovery
math
3400
x199
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12560
1239A
Ivan the Fool and the Probability Theory
combinatorics
,
dp
,
math
1700
x7337
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7408
1238A
Prime Subtraction
math
,
number theory
900
x24214
1237E
Balanced Binary Search Trees
dp
,
math
2400
x1320
1237A
Balanced Rating Changes
implementation
,
math
1000
x19714
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x177
1236B
Alice and the List of Presents
combinatorics
,
math
1500
x11020
1236A
Stones
brute force
,
greedy
,
math
800
x16271
1234E
Special Permutations
math
2000
x2776
1234A
Equalize Prices Again
math
800
x27795
1228E
Another Filling the Grid
combinatorics
,
dp
,
math
2300
x2714
1228C
Primes and Multiplication
math
,
number theory
1700
x9014
1228B
Filling the Grid
implementation
,
math
1400
x11503
1227F2
Wrong Answer on test 233 (Hard Version)
combinatorics
,
math
2400
x1495
1227A
Math Problem
math
1100
x9789
1225D
Power Products
hashing
,
math
,
number theory
1800
x7948
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8939
1225A
Forgetting Things
math
900
x15794
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x250
1223A
CME
math
800
x21584
1221C
Perfect Team
binary search
,
math
1200
x20963
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16791
1220D
Alex and Julian
bitmasks
,
math
,
number theory
1900
x3886
1220B
Multiplication Table
math
,
number theory
1300
x11592
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1876
1217B
Zmei Gorynich
greedy
,
math
1600
x11181
1217A
Creating a Character
binary search
,
math
1300
x14941
1216E2
Numerical Sequence (hard version)
binary search
,
math
2200
x1455
1216E1
Numerical Sequence (easy version)
binary search
,
brute force
,
math
1900
x3429
1216D
Swords
math
1300
x11113
1216C
White Sheet
geometry
,
math
1700
x9188
1215D
Ticket Game
games
,
greedy
,
math
1700
x6084
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11519
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2692
1214B
Badges
brute force
,
math
1100
x10831
1214A
Optimal Currency Exchange
brute force
,
math
1400
x9083
1213D2
Equalizing by Division (hard version)
brute force
,
math
,
sortings
1600
x11425
1213C
Book Reading
math
1200
x18397
1213A
Chips Moving
math
900
x24025
1211G
King's Path
*special problem
,
math
,
trees
2500
x71
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x229
1210E
Wojtek and Card Tricks
math
2700
x406
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3321
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x141
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x8152
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12186
1208G
Polygons
greedy
,
math
,
number theory
2800
x753
1208A
XORinacci
math
900
x16711
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x5890
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21715
1206A
Choose Two Numbers
math
,
sortings
800
x24257
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x123
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14106
1204E
Natasha, Sasha and the Prefix Sums
combinatorics
,
dp
,
math
,
number theory
2300
x1657
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x3231
1204B
Mislove Has Lost an Array
greedy
,
math
900
x17493
1204A
BowWow and the Timetable
math
1000
x20787
1203C
Common Divisors
implementation
,
math
1300
x20499
1203B
Equal Rectangles
greedy
,
math
1200
x15933
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x395
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x5089
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2530
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x23330
1201B
Zero Array
greedy
,
math
1500
x18692
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1068
1200C
Round Corridor
math
,
number theory
1400
x9852
1199B
Water Lily
geometry
,
math
1000
x20391
1197D
Yet Another Subarray Problem
dp
,
greedy
,
math
1900
x5366
1197A
DIY Wooden Ladder
greedy
,
math
,
sortings
900
x13506
1196B
Odd Sum Segments
constructive algorithms
,
math
1200
x16547
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27661
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x890
1195D2
Submarine in the Rybinsk Sea (hard edition)
combinatorics
,
math
,
number theory
1800
x4652
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7878
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19639
1195A
Drinks Choosing
greedy
,
math
1000
x12978
1194D
1-2-K Game
games
,
math
1700
x6493
1194A
Remove a Progression
math
800
x16191
1193A
Amusement Park
*special problem
,
dp
,
math
x271
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10564
1189B
Number Circle
greedy
,
math
,
sortings
1100
x14181
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4493
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x871
1187A
Stickers and Toys
math
900
x14852
1186E
Vus the Cossack and a Field
divide and conquer
,
implementation
,
math
2500
x624
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8920
1186C
Vus the Cossack and Strings
implementation
,
math
1800
x6100
1185D
Extra Element
implementation
,
math
1700
x6711
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7449
1185A
Ropewalkers
math
800
x14862
1184D2
Parallel Universes (Hard)
math
,
matrices
3100
x106
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x139
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5936
1183F
Topforces Strikes Back
brute force
,
math
,
sortings
2100
x2010
1183C
Computer Game
binary search
,
math
1400
x13945
1183B
Equalize Prices
math
900
x18466
1182E
Product Oriented Recurrence
dp
,
math
,
matrices
,
number theory
2300
x2802
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