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Educational Codeforces Round 165 (Rated for Div. 2)
25:06:09
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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
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28618
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28689
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28700
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x28937
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x28961
1077A
Frog Jumping
math
800
x29025
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29096
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29351
1622A
Construct a Rectangle
geometry
,
math
800
x29427
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29593
1519B
The Cake Is a Lie
dp
,
math
800
x29684
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x29726
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x29805
1547A
Shortest Path with Obstacle
implementation
,
math
800
x29849
1811A
Insert Digit
greedy
,
math
,
strings
800
x29947
1619B
Squares and Cubes
implementation
,
math
800
x29992
1553A
Digits Sum
math
,
number theory
800
x30068
1506A
Strange Table
math
800
x30078
1611A
Make Even
constructive algorithms
,
math
800
x30544
1490A
Dense Array
greedy
,
math
800
x30580
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x30972
1538B
Friends and Candies
greedy
,
math
800
x30982
1549A
Gregor and Cryptography
math
,
number theory
800
x31273
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31299
1716A
2-3 Moves
greedy
,
math
800
x31313
1675A
Food for Animals
greedy
,
math
800
x31431
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x31490
1919A
Wallet Exchange
games
,
math
800
x31593
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31616
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32753
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32809
1950C
Clock Conversion
implementation
,
math
800
x33801
1858A
Buttons
games
,
greedy
,
math
800
x33983
1955A
Yogurt Sale
math
800
x34298
1560B
Who's Opposite?
math
800
x34646
1873C
Target Practice
implementation
,
math
800
x34920
1660A
Vasya and Coins
greedy
,
math
800
x34958
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35087
1593A
Elections
math
800
x35465
1369A
FashionabLee
geometry
,
math
800
x35529
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35534
1537A
Arithmetic Array
greedy
,
math
800
x35892
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35934
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36686
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37141
1899A
Game with Integers
games
,
math
,
number theory
800
x37361
1385A
Three Pairwise Maximums
math
800
x37503
1579A
Casimir's String Solitaire
math
,
strings
800
x37740
1358A
Park Lighting
greedy
,
math
800
x38034
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38239
1348A
Phoenix and Balance
greedy
,
math
800
x38317
1941A
Rudolf and the Ticket
brute force
,
math
800
x38442
1729A
Two Elevators
math
800
x38790
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38910
1296A
Array with Odd Sum
math
800
x39364
1921A
Square
greedy
,
math
800
x39665
233A
Perfect Permutation
implementation
,
math
800
x40317
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40616
1472A
Cards for Friends
greedy
,
math
800
x40774
1542A
Odd Set
math
800
x42114
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42700
1857A
Array Coloring
greedy
,
math
800
x43164
1873B
Good Kid
brute force
,
greedy
,
math
800
x43899
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43973
1294A
Collecting Coins
math
800
x44163
1371A
Magical Sticks
math
800
x44191
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44926
1426A
Floor Number
implementation
,
math
800
x45409
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46325
1283A
Minutes Before the New Year
math
800
x46385
1472B
Fair Division
dp
,
greedy
,
math
800
x47340
1360A
Minimal Square
greedy
,
math
800
x47905
1551A
Polycarp and Coins
greedy
,
math
800
x48241
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48579
1433A
Boring Apartments
implementation
,
math
800
x49143
1624A
Plus One on the Subset
math
800
x49615
1367B
Even Array
greedy
,
math
800
x50106
1374A
Required Remainder
math
800
x50462
9A
Die Roll
math
,
probabilities
800
x52336
1343B
Balanced Array
constructive algorithms
,
math
800
x53530
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56852
758A
Holiday Of Equality
implementation
,
math
800
x57069
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62313
151A
Soft Drinking
implementation
,
math
800
x65504
1154A
Restoring Three Numbers
math
800
x66170
581A
Vasya the Hipster
implementation
,
math
800
x66923
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67034
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70471
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70579
1352A
Sum of Round Numbers
implementation
,
math
800
x71560
1335A
Candies and Two Sisters
math
800
x78393
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86864
1328A
Divisibility Problem
math
800
x92942
200B
Drinks
implementation
,
math
800
x107359
486A
Calculating Function
implementation
,
math
800
x108969
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166969
617A
Elephant
math
800
x169455
50A
Domino piling
greedy
,
math
800
x227985
4A
Watermelon
brute force
,
math
800
x479724
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