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Before contest
Codeforces Round 955 (Div. 2, with prizes from NEAR!)
07:54:56
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→ Filter Problems
Difficulty:
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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
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Status
Standings
Custom test
Problems
#
Name
404A
Valera and X
implementation
1000
x23220
401A
Vanya and Cards
implementation
,
math
800
x15936
400A
Inna and Choose Options
implementation
1000
x6414
389A
Fox and Number Game
greedy
,
math
1000
x13907
387A
George and Sleep
implementation
900
x9577
386A
Second-Price Auction
implementation
800
x6034
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16290
384A
Coder
implementation
800
x15954
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x61830
379A
New Year Candles
implementation
1000
x45033
378A
Playing with Dice
brute force
800
x23281
376A
Lever
implementation
,
math
900
x9078
373A
Collecting Beats is Fun
implementation
900
x10457
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5972
369A
Valera and Plates
greedy
,
implementation
900
x10851
368A
Sereja and Coat Rack
implementation
1000
x7409
363A
Soroban
implementation
800
x10560
361A
Levko and Table
constructive algorithms
,
implementation
800
x16363
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8424
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6746
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24901
344A
Magnets
implementation
800
x114085
339B
Xenia and Ringroad
implementation
1000
x67493
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x202663
337A
Puzzles
greedy
900
x76685
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x9931
334A
Candy Bags
implementation
1000
x18192
330A
Cakeminator
brute force
,
implementation
800
x27693
322A
Ciel and Dancing
greedy
1000
x8116
320A
Magic Numbers
brute force
,
greedy
900
x34343
318A
Even Odds
math
900
x108331
313A
Ilya and Bank Account
implementation
,
number theory
900
x54355
306A
Candies
implementation
800
x6633
302A
Eugeny and Array
implementation
800
x8973
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5188
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7810
294A
Shaass and Oskols
implementation
,
math
800
x22548
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6015
284B
Cows and Poker Game
brute force
,
implementation
1000
x6699
282A
Bit++
implementation
800
x243225
281A
Word Capitalization
implementation
,
strings
800
x200225
278A
Circle Line
implementation
800
x11508
276A
Lunch Rush
implementation
900
x26967
275A
Lights Out
implementation
900
x29046
272A
Dima and Friends
implementation
,
math
1000
x23841
271A
Beautiful Year
brute force
800
x130364
268B
Buttons
implementation
,
math
1000
x31367
268A
Games
brute force
800
x82498
267A
Subtractions
math
,
number theory
900
x7256
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x129086
266A
Stones on the Table
implementation
800
x181349
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x16992
265A
Colorful Stones (Simplified Edition)
implementation
800
x34994
263B
Squares
greedy
,
implementation
,
sortings
900
x8774
263A
Beautiful Matrix
implementation
800
x230225
262A
Roma and Lucky Numbers
implementation
800
x19366
259A
Little Elephant and Chess
brute force
,
strings
1000
x8979
255A
Greg's Workout
implementation
800
x27909
250A
Paper Work
greedy
1000
x4017
248A
Cupboards
implementation
800
x21649
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9113
245A
System Administrator
implementation
800
x8313
244A
Dividing Orange
implementation
900
x7783
237A
Free Cash
implementation
1000
x26114
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x197871
234B
Reading
sortings
1000
x7031
233A
Perfect Permutation
implementation
,
math
800
x41054
231A
Team
brute force
,
greedy
800
x305903
230A
Dragons
greedy
,
sortings
1000
x75733
228A
Is your horseshoe on the other hoof?
implementation
800
x104193
221A
Little Elephant and Function
implementation
,
math
1000
x14843
219A
k-String
implementation
,
strings
1000
x26568
215A
Bicycle Chain
brute force
,
implementation
900
x14094
214A
System of Equations
brute force
800
x34132
208A
Dubstep
strings
900
x85094
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21811
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x16146
200B
Drinks
implementation
,
math
800
x110079
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25533
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x8586
194A
Exams
implementation
,
math
900
x9703
182B
Vasya's Calendar
implementation
1000
x6830
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6789
178A2
Educational Game
greedy
1000
x1587
178A1
Educational Game
1000
x1564
177B1
Rectangular Game
number theory
1000
x4021
177A2
Good Matrix Elements
implementation
800
x7117
177A1
Good Matrix Elements
implementation
800
x8320
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5956
169A
Chores
sortings
800
x6609
168A
Wizards and Demonstration
implementation
,
math
900
x10387
165A
Supercentral Point
implementation
1000
x22920
160A
Twins
greedy
,
sortings
900
x112747
158A
Next Round
*special problem
,
implementation
800
x236902
157B
Trace
geometry
,
sortings
1000
x12951
157A
Game Outcome
brute force
800
x7455
155A
I_love_\%username\%
brute force
800
x71945
152A
Marks
implementation
900
x16357
151A
Soft Drinking
implementation
,
math
800
x67822
149A
Business trip
greedy
,
implementation
,
sortings
900
x38364
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