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Educational Codeforces Round 168 (Rated for Div. 2)
28:21:19
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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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Custom test
Problems
#
Name
780A
Andryusha and Socks
implementation
800
x19128
770A
New Password
*special problem
,
implementation
800
x19326
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5637
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16152
760A
Petr and a calendar
implementation
,
math
800
x7840
758A
Holiday Of Equality
implementation
,
math
800
x59184
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17791
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x73270
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x48026
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8681
747A
Display Size
brute force
,
math
800
x10106
746A
Compote
implementation
,
math
800
x21133
735A
Ostap and Grasshopper
implementation
,
strings
800
x12373
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28984
734A
Anton and Danik
implementation
,
strings
800
x145809
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x69927
731A
Night at the Museum
implementation
,
strings
800
x44511
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x74615
721A
One-dimensional Japanese Crossword
implementation
800
x18285
716A
Crazy Computer
implementation
800
x21943
712A
Memory and Crow
implementation
,
math
800
x11575
711A
Bus to Udayland
brute force
,
implementation
800
x29096
710A
King Moves
implementation
800
x13685
707A
Brain's Photos
implementation
800
x47957
705A
Hulk
implementation
800
x102684
703A
Mishka and Game
implementation
800
x55074
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x43447
701A
Cards
greedy
,
implementation
800
x19370
688A
Opponents
implementation
800
x13849
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x36599
681A
A Good Contest
implementation
800
x15223
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12266
678A
Johny Likes Numbers
implementation
,
math
800
x12707
677A
Vanya and Fence
implementation
800
x135658
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13721
673A
Bear and Game
implementation
800
x9990
672A
Summer Camp
implementation
800
x15177
669A
Little Artem and Presents
math
800
x10647
664A
Complicated GCD
math
,
number theory
800
x17863
658A
Bear and Reverse Radewoosh
implementation
800
x7021
648B
Собери стол
constructive algorithms
,
sortings
800
x1305
630A
Again Twenty Five!
number theory
800
x64721
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13276
624A
Save Luke
math
800
x10211
620A
Professor GukiZ's Robot
implementation
,
math
800
x12975
618A
Slime Combining
implementation
800
x8310
617A
Elephant
math
800
x176838
615A
Bulbs
implementation
800
x17058
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x17015
599A
Patrick and Shopping
implementation
800
x28297
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14448
581A
Vasya the Hipster
implementation
,
math
800
x69145
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16140
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x174063
540A
Combination Lock
implementation
800
x32075
520A
Pangram
implementation
,
strings
800
x93641
513A
Game
constructive algorithms
,
math
800
x20094
510A
Fox And Snake
implementation
800
x80363
509A
Maximum in Table
brute force
,
implementation
800
x37832
492A
Vanya and Cubes
implementation
800
x48571
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x57508
486A
Calculating Function
implementation
,
math
800
x113451
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x58481
469A
I Wanna Be the Guy
greedy
,
implementation
800
x94491
467A
George and Accommodation
implementation
800
x117732
454A
Little Pony and Crystal Mine
implementation
800
x14675
448A
Rewards
implementation
800
x24063
447A
DZY Loves Hash
implementation
800
x9516
443A
Anton and Letters
constructive algorithms
,
implementation
800
x86900
440A
Forgotten Episode
implementation
800
x7212
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x58217
431A
Black Square
implementation
800
x53260
427A
Police Recruits
implementation
800
x75255
426A
Sereja and Mugs
implementation
800
x9088
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x5852
411A
Password Check
*special problem
,
implementation
800
x7134
401A
Vanya and Cards
implementation
,
math
800
x16012
386A
Second-Price Auction
implementation
800
x6086
384A
Coder
implementation
800
x16021
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x63130
378A
Playing with Dice
brute force
800
x23483
363A
Soroban
implementation
800
x10635
361A
Levko and Table
constructive algorithms
,
implementation
800
x16475
344A
Magnets
implementation
800
x115942
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x205748
330A
Cakeminator
brute force
,
implementation
800
x27991
306A
Candies
implementation
800
x6667
302A
Eugeny and Array
implementation
800
x9018
294A
Shaass and Oskols
implementation
,
math
800
x22866
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6038
282A
Bit++
implementation
800
x248107
281A
Word Capitalization
implementation
,
strings
800
x203101
278A
Circle Line
implementation
800
x11565
271A
Beautiful Year
brute force
800
x132298
268A
Games
brute force
800
x83763
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x130681
266A
Stones on the Table
implementation
800
x183874
265A
Colorful Stones (Simplified Edition)
implementation
800
x35560
263A
Beautiful Matrix
implementation
800
x234198
262A
Roma and Lucky Numbers
implementation
800
x19491
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