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Educational Codeforces Round 167 (Rated for Div. 2)
23:35:45
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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
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8669
747A
Display Size
brute force
,
math
800
x10071
746A
Compote
implementation
,
math
800
x21021
735A
Ostap and Grasshopper
implementation
,
strings
800
x12348
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28731
734A
Anton and Danik
implementation
,
strings
800
x143656
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x68851
731A
Night at the Museum
implementation
,
strings
800
x43902
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x73028
721A
One-dimensional Japanese Crossword
implementation
800
x18169
716A
Crazy Computer
implementation
800
x21893
712A
Memory and Crow
implementation
,
math
800
x11545
711A
Bus to Udayland
brute force
,
implementation
800
x28980
710A
King Moves
implementation
800
x13624
707A
Brain's Photos
implementation
800
x47312
705A
Hulk
implementation
800
x101435
703A
Mishka and Game
implementation
800
x54426
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x42821
701A
Cards
greedy
,
implementation
800
x19256
688A
Opponents
implementation
800
x13807
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x36129
681A
A Good Contest
implementation
800
x15160
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12245
678A
Johny Likes Numbers
implementation
,
math
800
x12653
677A
Vanya and Fence
implementation
800
x133641
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13684
673A
Bear and Game
implementation
800
x9939
672A
Summer Camp
implementation
800
x15109
669A
Little Artem and Presents
math
800
x10593
664A
Complicated GCD
math
,
number theory
800
x17673
658A
Bear and Reverse Radewoosh
implementation
800
x6999
648B
Собери стол
constructive algorithms
,
sortings
800
x1274
630A
Again Twenty Five!
number theory
800
x63643
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13200
624A
Save Luke
math
800
x10190
620A
Professor GukiZ's Robot
implementation
,
math
800
x12880
618A
Slime Combining
implementation
800
x8301
617A
Elephant
math
800
x174203
615A
Bulbs
implementation
800
x16711
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x16899
599A
Patrick and Shopping
implementation
800
x28078
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14419
581A
Vasya the Hipster
implementation
,
math
800
x68464
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16082
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x171525
540A
Combination Lock
implementation
800
x31865
520A
Pangram
implementation
,
strings
800
x91839
513A
Game
constructive algorithms
,
math
800
x20042
510A
Fox And Snake
implementation
800
x79027
509A
Maximum in Table
brute force
,
implementation
800
x37569
492A
Vanya and Cubes
implementation
800
x47832
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x56687
486A
Calculating Function
implementation
,
math
800
x111793
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57898
469A
I Wanna Be the Guy
greedy
,
implementation
800
x93193
467A
George and Accommodation
implementation
800
x116146
454A
Little Pony and Crystal Mine
implementation
800
x14589
448A
Rewards
implementation
800
x23999
447A
DZY Loves Hash
implementation
800
x9421
443A
Anton and Letters
constructive algorithms
,
implementation
800
x85647
440A
Forgotten Episode
implementation
800
x7161
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x57567
431A
Black Square
implementation
800
x52476
427A
Police Recruits
implementation
800
x74069
426A
Sereja and Mugs
implementation
800
x9066
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x5819
411A
Password Check
*special problem
,
implementation
800
x7088
401A
Vanya and Cards
implementation
,
math
800
x15945
386A
Second-Price Auction
implementation
800
x6037
384A
Coder
implementation
800
x15956
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x61936
378A
Playing with Dice
brute force
800
x23284
363A
Soroban
implementation
800
x10563
361A
Levko and Table
constructive algorithms
,
implementation
800
x16365
344A
Magnets
implementation
800
x114162
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x202803
330A
Cakeminator
brute force
,
implementation
800
x27705
306A
Candies
implementation
800
x6636
302A
Eugeny and Array
implementation
800
x8976
294A
Shaass and Oskols
implementation
,
math
800
x22563
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6016
282A
Bit++
implementation
800
x243476
281A
Word Capitalization
implementation
,
strings
800
x200379
278A
Circle Line
implementation
800
x11510
271A
Beautiful Year
brute force
800
x130437
268A
Games
brute force
800
x82580
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x129167
266A
Stones on the Table
implementation
800
x181474
265A
Colorful Stones (Simplified Edition)
implementation
800
x35021
263A
Beautiful Matrix
implementation
800
x230427
262A
Roma and Lucky Numbers
implementation
800
x19372
255A
Greg's Workout
implementation
800
x27924
248A
Cupboards
implementation
800
x21659
245A
System Administrator
implementation
800
x8315
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x198030
233A
Perfect Permutation
implementation
,
math
800
x41079
231A
Team
brute force
,
greedy
800
x306123
228A
Is your horseshoe on the other hoof?
implementation
800
x104266
214A
System of Equations
brute force
800
x34149
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x16154
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