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Educational Codeforces Round 165 (Rated for Div. 2)
35:56:37
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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
572A
Arrays
sortings
900
x16239
1668B
Social Distance
greedy
,
math
,
sortings
900
x16304
1248B
Grow The Tree
greedy
,
math
,
sortings
900
x16450
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x16605
16B
Burglar and Matches
greedy
,
implementation
,
sortings
900
x16775
1427A
Avoiding Zero
math
,
sortings
900
x16818
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x16911
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18030
1501B
Napoleon Cake
dp
,
implementation
,
sortings
900
x18427
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x18640
807A
Is it rated?
implementation
,
sortings
900
x19393
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20009
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21949
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x21989
1420A
Cubes Sorting
math
,
sortings
900
x22822
1833B
Restore the Weather
greedy
,
sortings
900
x25305
1697B
Promo
greedy
,
sortings
900
x25411
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x26072
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29526
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32056
149A
Business trip
greedy
,
implementation
,
sortings
900
x37608
34B
Sale
greedy
,
sortings
900
x48431
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94068
160A
Twins
greedy
,
sortings
900
x110494
648B
Собери стол
constructive algorithms
,
sortings
800
x1199
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5566
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x5977
169A
Chores
sortings
800
x6546
992A
Nastya and an Array
implementation
,
sortings
800
x12887
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13319
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13531
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13771
937A
Olympiad
implementation
,
sortings
800
x14818
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15228
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x15990
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16080
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16365
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16442
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x16780
1930A
Maximise The Score
greedy
,
sortings
800
x16988
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x17471
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x17836
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18310
1896A
Jagged Swaps
sortings
800
x18366
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18402
1445A
Array Rearrangment
greedy
,
sortings
800
x18797
984A
Game
sortings
800
x18876
1430B
Barrels
greedy
,
implementation
,
sortings
800
x19103
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19148
1656A
Good Pairs
math
,
sortings
800
x19226
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19315
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19552
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19588
1836A
Destroyer
implementation
,
sortings
800
x19753
1733A
Consecutive Sum
greedy
,
sortings
800
x20644
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20706
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20733
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20846
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21557
1847A
The Man who became a God
greedy
,
sortings
800
x21631
1637A
Sorting Parts
brute force
,
sortings
800
x22058
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22401
1730A
Planets
data structures
,
greedy
,
sortings
800
x22489
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23112
1206A
Choose Two Numbers
math
,
sortings
800
x23433
1552A
Subsequence Permutation
sortings
,
strings
800
x23495
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x23647
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23843
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x23845
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24025
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24045
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24330
1041A
Heist
greedy
,
implementation
,
sortings
800
x24447
1705A
Mark the Photographer
greedy
,
sortings
800
x24790
1092B
Teams Forming
sortings
800
x25603
1487A
Arena
implementation
,
sortings
800
x26143
1792A
GamingForces
greedy
,
sortings
800
x27091
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x27110
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27437
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27980
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x28307
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28525
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28684
1220A
Cards
implementation
,
sortings
,
strings
800
x28791
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x31490
1692B
All Distinct
greedy
,
sortings
800
x32658
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32808
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32873
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34833
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35073
1669B
Triple
implementation
,
sortings
800
x39681
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40125
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44122
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44922
1360B
Honest Coach
greedy
,
sortings
800
x45942
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47433
1850A
To My Critics
implementation
,
sortings
800
x50683
1760A
Medium Number
implementation
,
sortings
800
x53244
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55300
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56497
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