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Before contest
Codeforces Round 941 (Div. 1)
46:55:20
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
46:55:20
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→ Filter Problems
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combine-tags-by-or
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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
4A
Watermelon
brute force
,
math
800
x479197
71A
Way Too Long Words
strings
800
x351920
231A
Team
brute force
,
greedy
800
x297779
1A
Theatre Square
math
1000
x244907
282A
Bit++
implementation
800
x234813
158A
Next Round
*special problem
,
implementation
800
x231525
50A
Domino piling
greedy
,
math
800
x227756
263A
Beautiful Matrix
implementation
800
x223578
112A
Petya and Strings
implementation
,
strings
800
x208220
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197309
281A
Word Capitalization
implementation
,
strings
800
x195199
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192236
118A
String Task
implementation
,
strings
1000
x180589
791A
Bear and Big Brother
implementation
800
x177844
266A
Stones on the Table
implementation
800
x177146
617A
Elephant
math
800
x169224
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166684
59A
Word
implementation
,
strings
800
x161159
69A
Young Physicist
implementation
,
math
1000
x154436
977A
Wrong Subtraction
implementation
800
x154117
96A
Football
implementation
,
strings
900
x148455
110A
Nearly Lucky Number
implementation
800
x141835
734A
Anton and Danik
implementation
,
strings
800
x139307
41A
Translation
implementation
,
strings
800
x134190
116A
Tram
implementation
800
x131505
677A
Vanya and Fence
implementation
800
x129904
271A
Beautiful Year
brute force
800
x126945
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126252
58A
Chat room
greedy
,
strings
1000
x121741
1030A
In Search of an Easy Problem
implementation
800
x119262
122A
Lucky Division
brute force
,
number theory
1000
x115544
467A
George and Accommodation
implementation
800
x113246
344A
Magnets
implementation
800
x111174
160A
Twins
greedy
,
sortings
900
x110412
486A
Calculating Function
implementation
,
math
800
x108856
136A
Presents
implementation
800
x108626
200B
Drinks
implementation
,
math
800
x107261
318A
Even Odds
math
900
x105696
61A
Ultra-Fast Mathematician
implementation
800
x103193
228A
Is your horseshoe on the other hoof?
implementation
800
x101460
133A
HQ9+
implementation
900
x99619
705A
Hulk
implementation
800
x98997
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x93967
1328A
Divisibility Problem
math
800
x92818
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90942
520A
Pangram
implementation
,
strings
800
x89324
144A
Arrival of the General
implementation
800
x88619
479A
Expression
brute force
,
math
1000
x88278
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86795
996A
Hit the Lottery
dp
,
greedy
800
x83824
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83651
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83528
208A
Dubstep
strings
900
x83199
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82191
785A
Anton and Polyhedrons
implementation
,
strings
800
x81780
131A
cAPS lOCK
implementation
,
strings
1000
x80939
25A
IQ test
brute force
1300
x80797
268A
Games
brute force
800
x80574
1335A
Candies and Two Sisters
math
800
x78318
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77591
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76705
510A
Fox And Snake
implementation
800
x76511
337A
Puzzles
greedy
900
x75287
230A
Dragons
greedy
,
sortings
1000
x74005
427A
Police Recruits
implementation
800
x72123
1352A
Sum of Round Numbers
implementation
,
math
800
x71443
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70871
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70508
155A
I_love_\%username\%
brute force
800
x70359
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70350
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69579
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66935
581A
Vasya the Hipster
implementation
,
math
800
x66864
339B
Xenia and Ringroad
implementation
1000
x66201
1154A
Restoring Three Numbers
math
800
x66111
151A
Soft Drinking
implementation
,
math
800
x65410
1742A
Sum
implementation
800
x64065
1399A
Remove Smallest
greedy
,
sortings
800
x62468
451A
Game With Sticks
implementation
900
x62418
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62259
189A
Cut Ribbon
brute force
,
dp
1300
x62230
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62074
630A
Again Twenty Five!
number theory
800
x61587
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59908
1512A
Spy Detected!
brute force
,
implementation
800
x59613
466A
Cheap Travel
implementation
1200
x59287
1692A
Marathon
implementation
800
x59284
32B
Borze
expression parsing
,
implementation
800
x58384
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58025
1676A
Lucky?
implementation
800
x57595
758A
Holiday Of Equality
implementation
,
math
800
x57005
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56812
1669A
Division?
implementation
800
x56623
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56451
579A
Raising Bacteria
bitmasks
1000
x55811
1560A
Dislike of Threes
implementation
800
x55620
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55239
1807A
Plus or Minus
implementation
800
x55228
1475A
Odd Divisor
math
,
number theory
900
x54820
1367A
Short Substrings
implementation
,
strings
800
x54649
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