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Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
37:44:02
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Difficulty:
—
implementation
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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Custom test
Problems
#
Name
1722B
Colourblindness
implementation
800
x43020
1772A
A+B?
implementation
800
x43754
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44122
1703B
ICPC Balloons
data structures
,
implementation
800
x45082
1426A
Floor Number
implementation
,
math
800
x45402
1829A
Love Story
implementation
,
strings
800
x45574
707A
Brain's Photos
implementation
800
x46064
1535A
Fair Playoff
brute force
,
implementation
800
x46153
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46316
492A
Vanya and Cubes
implementation
800
x46551
1722A
Spell Check
implementation
800
x46582
1619A
Square String?
implementation
,
strings
800
x48315
1873A
Short Sort
brute force
,
implementation
800
x48327
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48573
1915A
Odd One Out
bitmasks
,
implementation
800
x49103
1433A
Boring Apartments
implementation
,
math
800
x49137
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49463
1850A
To My Critics
implementation
,
sortings
800
x50683
431A
Black Square
implementation
800
x51247
1760A
Medium Number
implementation
,
sortings
800
x53240
703A
Mishka and Game
implementation
800
x53400
1791A
Codeforces Checking
implementation
,
strings
800
x54562
1367A
Short Substrings
implementation
,
strings
800
x54688
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55300
1807A
Plus or Minus
implementation
800
x55323
1560A
Dislike of Threes
implementation
800
x55674
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56497
1669A
Division?
implementation
800
x56742
758A
Holiday Of Equality
implementation
,
math
800
x57060
1676A
Lucky?
implementation
800
x57675
32B
Borze
expression parsing
,
implementation
800
x58450
1692A
Marathon
implementation
800
x59356
1512A
Spy Detected!
brute force
,
implementation
800
x59695
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60009
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62207
1742A
Sum
implementation
800
x64194
151A
Soft Drinking
implementation
,
math
800
x65487
581A
Vasya the Hipster
implementation
,
math
800
x66910
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67010
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70450
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70558
1352A
Sum of Round Numbers
implementation
,
math
800
x71528
427A
Police Recruits
implementation
800
x72188
510A
Fox And Snake
implementation
800
x76657
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77644
785A
Anton and Polyhedrons
implementation
,
strings
800
x81881
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83603
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86854
144A
Arrival of the General
implementation
800
x88684
520A
Pangram
implementation
,
strings
800
x89415
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91025
705A
Hulk
implementation
800
x99104
228A
Is your horseshoe on the other hoof?
implementation
800
x101554
61A
Ultra-Fast Mathematician
implementation
800
x103273
200B
Drinks
implementation
,
math
800
x107348
136A
Presents
implementation
800
x108725
486A
Calculating Function
implementation
,
math
800
x108953
344A
Magnets
implementation
800
x111299
467A
George and Accommodation
implementation
800
x113329
1030A
In Search of an Easy Problem
implementation
800
x119387
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126327
677A
Vanya and Fence
implementation
800
x130053
116A
Tram
implementation
800
x131595
41A
Translation
implementation
,
strings
800
x134378
734A
Anton and Danik
implementation
,
strings
800
x139504
110A
Nearly Lucky Number
implementation
800
x141962
977A
Wrong Subtraction
implementation
800
x154257
59A
Word
implementation
,
strings
800
x161312
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166940
266A
Stones on the Table
implementation
800
x177390
791A
Bear and Big Brother
implementation
800
x178081
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192439
281A
Word Capitalization
implementation
,
strings
800
x195367
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197499
112A
Petya and Strings
implementation
,
strings
800
x208407
263A
Beautiful Matrix
implementation
800
x223799
158A
Next Round
*special problem
,
implementation
800
x231710
282A
Bit++
implementation
800
x235058
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