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Rayan
→ Pay attention
Before contest
Educational Codeforces Round 176 (Rated for Div. 2)
37:49:17
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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
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
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strings
ternary search
trees
two pointers
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Problems
#
Name
4A
Watermelon
brute force
,
math
800
x568800
1A
Theatre Square
math
1000
x277726
50A
Domino piling
greedy
,
math
800
x265561
617A
Elephant
math
800
x202446
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x197395
69A
Young Physicist
implementation
,
math
1000
x176491
486A
Calculating Function
implementation
,
math
800
x128443
200B
Drinks
implementation
,
math
800
x125077
318A
Even Odds
math
900
x121640
1328A
Divisibility Problem
math
800
x110791
479A
Expression
brute force
,
math
1000
x99060
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x97925
1335A
Candies and Two Sisters
math
800
x90268
1352A
Sum of Round Numbers
implementation
,
math
800
x86316
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x84647
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x80649
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x80385
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x79366
151A
Soft Drinking
implementation
,
math
800
x79279
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x76848
1154A
Restoring Three Numbers
math
800
x75358
581A
Vasya the Hipster
implementation
,
math
800
x74984
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x70405
1475A
Odd Divisor
math
,
number theory
900
x67014
758A
Holiday Of Equality
implementation
,
math
800
x64685
1999A
A+B Again?
implementation
,
math
800
x64662
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x63046
9A
Die Roll
math
,
probabilities
800
x60368
1343B
Balanced Array
constructive algorithms
,
math
800
x58890
1352C
K-th Not Divisible by n
binary search
,
math
1200
x58867
2009A
Minimize!
brute force
,
math
800
x58620
1374A
Required Remainder
math
800
x56521
1367B
Even Array
greedy
,
math
800
x56328
1899A
Game with Integers
games
,
math
,
number theory
800
x55471
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x55349
1433A
Boring Apartments
implementation
,
math
800
x55248
1374B
Multiply by 2, divide by 6
math
900
x54924
1624A
Plus One on the Subset
math
800
x54427
1857A
Array Coloring
greedy
,
math
800
x54100
1283A
Minutes Before the New Year
math
800
x53898
1551A
Polycarp and Coins
greedy
,
math
800
x53598
1472B
Fair Division
dp
,
greedy
,
math
800
x53564
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x53561
1873B
Good Kid
brute force
,
greedy
,
math
800
x53273
1360A
Minimal Square
greedy
,
math
800
x52930
1676B
Equal Candies
greedy
,
math
,
sortings
800
x52229
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x51570
1475B
New Year's Number
brute force
,
dp
,
math
900
x51376
1520D
Same Differences
data structures
,
hashing
,
math
1200
x51234
1426A
Floor Number
implementation
,
math
800
x50101
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x49799
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x49659
1343A
Candies
brute force
,
math
900
x49506
1294A
Collecting Coins
math
800
x48739
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x47749
1371A
Magical Sticks
math
800
x47550
584A
Olesya and Rodion
math
1000
x47420
1996A
Legs
binary search
,
math
,
ternary search
800
x47295
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x47021
1542A
Odd Set
math
800
x46731
1955A
Yogurt Sale
math
800
x46579
1873C
Target Practice
implementation
,
math
800
x46531
476A
Dreamoon and Stairs
implementation
,
math
1000
x46020
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x45999
2044A
Easy Problem
brute force
,
math
800
x45475
1921A
Square
greedy
,
math
800
x45139
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x44979
233A
Perfect Permutation
implementation
,
math
800
x44484
1941A
Rudolf and the Ticket
brute force
,
math
800
x44171
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x44080
1858A
Buttons
games
,
greedy
,
math
800
x43836
1296A
Array with Odd Sum
math
800
x43814
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x43724
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x43531
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x43151
1472A
Cards for Friends
greedy
,
math
800
x43102
1980A
Problem Generator
math
800
x42990
1950C
Clock Conversion
implementation
,
math
800
x42618
1342A
Road To Zero
greedy
,
math
1000
x42262
1729A
Two Elevators
math
800
x42049
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x41957
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x41376
1327A
Sum of Odd Integers
math
1100
x40805
1358A
Park Lighting
greedy
,
math
800
x40536
1901A
Line Trip
greedy
,
math
800
x40504
1348A
Phoenix and Balance
greedy
,
math
800
x40454
1385A
Three Pairwise Maximums
math
800
x40328
1872A
Two Vessels
brute force
,
greedy
,
math
800
x40274
124A
The number of positions
math
1000
x40041
1624B
Make AP
implementation
,
math
900
x39964
1579A
Casimir's String Solitaire
math
,
strings
800
x39860
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x39757
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x39739
2000A
Primary Task
implementation
,
math
,
strings
800
x39626
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x39517
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x39374
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x38742
1537A
Arithmetic Array
greedy
,
math
800
x38424
1593A
Elections
math
800
x38380
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x38275
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