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Codeforces Round 940 (Div. 2) and CodeCraft-23
43:21:06
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math
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
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
trees
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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x477988
1A
Theatre Square
math
1000
x244417
50A
Domino piling
greedy
,
math
800
x227217
617A
Elephant
math
800
x168747
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166274
69A
Young Physicist
implementation
,
math
1000
x154149
486A
Calculating Function
implementation
,
math
800
x108590
200B
Drinks
implementation
,
math
800
x107015
318A
Even Odds
math
900
x105490
1328A
Divisibility Problem
math
800
x92586
479A
Expression
brute force
,
math
1000
x88127
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86642
1335A
Candies and Two Sisters
math
800
x78142
1352A
Sum of Round Numbers
implementation
,
math
800
x71222
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70738
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70345
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70129
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69410
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66724
581A
Vasya the Hipster
implementation
,
math
800
x66721
1154A
Restoring Three Numbers
math
800
x65905
151A
Soft Drinking
implementation
,
math
800
x65198
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62132
758A
Holiday Of Equality
implementation
,
math
800
x56879
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56713
1475A
Odd Divisor
math
,
number theory
900
x54640
1343B
Balanced Array
constructive algorithms
,
math
800
x53397
9A
Die Roll
math
,
probabilities
800
x52131
1374A
Required Remainder
math
800
x50338
1367B
Even Array
greedy
,
math
800
x49959
1624A
Plus One on the Subset
math
800
x49478
1352C
K-th Not Divisible by n
binary search
,
math
1200
x49316
1433A
Boring Apartments
implementation
,
math
800
x49010
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48458
1551A
Polycarp and Coins
greedy
,
math
800
x48090
1360A
Minimal Square
greedy
,
math
800
x47788
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47644
1472B
Fair Division
dp
,
greedy
,
math
800
x47202
1283A
Minutes Before the New Year
math
800
x46239
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46218
1475B
New Year's Number
brute force
,
dp
,
math
900
x46133
1343A
Candies
brute force
,
math
900
x46109
1374B
Multiply by 2, divide by 6
math
900
x45450
1426A
Floor Number
implementation
,
math
800
x45286
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44749
1371A
Magical Sticks
math
800
x44118
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44111
1294A
Collecting Coins
math
800
x44064
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43824
1873B
Good Kid
brute force
,
greedy
,
math
800
x43604
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43252
1857A
Array Coloring
greedy
,
math
800
x42940
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42617
584A
Olesya and Rodion
math
1000
x42613
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42245
1542A
Odd Set
math
800
x42028
476A
Dreamoon and Stairs
implementation
,
math
1000
x40894
1472A
Cards for Friends
greedy
,
math
800
x40694
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40513
233A
Perfect Permutation
implementation
,
math
800
x40229
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39621
1921A
Square
greedy
,
math
800
x39468
1296A
Array with Odd Sum
math
800
x39270
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38851
1729A
Two Elevators
math
800
x38619
1348A
Phoenix and Balance
greedy
,
math
800
x38263
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38153
1342A
Road To Zero
greedy
,
math
1000
x38149
1941A
Rudolf and the Ticket
brute force
,
math
800
x38096
1358A
Park Lighting
greedy
,
math
800
x37978
1579A
Casimir's String Solitaire
math
,
strings
800
x37670
1385A
Three Pairwise Maximums
math
800
x37446
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37033
1899A
Game with Integers
games
,
math
,
number theory
800
x36991
1327A
Sum of Odd Integers
math
1100
x36694
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36552
124A
The number of positions
math
1000
x36147
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35852
1537A
Arithmetic Array
greedy
,
math
800
x35808
1369A
FashionabLee
geometry
,
math
800
x35472
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35465
1593A
Elections
math
800
x35369
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35163
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35104
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x35076
1660A
Vasya and Coins
greedy
,
math
800
x34893
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x34826
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x34812
1873C
Target Practice
implementation
,
math
800
x34647
1560B
Who's Opposite?
math
800
x34598
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34223
1353C
Board Moves
math
1000
x34083
1624B
Make AP
implementation
,
math
900
x33965
1858A
Buttons
games
,
greedy
,
math
800
x33784
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x32965
1950C
Clock Conversion
implementation
,
math
800
x32951
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32771
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32631
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32063
1955A
Yogurt Sale
math
800
x31972
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