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Before contest
Codeforces Round 941 (Div. 1)
06:27:07
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
06:27:07
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→ Filter Problems
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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
4A
Watermelon
brute force
,
math
800
x479534
71A
Way Too Long Words
strings
800
x352150
231A
Team
brute force
,
greedy
800
x297995
1A
Theatre Square
math
1000
x245032
282A
Bit++
implementation
800
x234989
158A
Next Round
*special problem
,
implementation
800
x231660
50A
Domino piling
greedy
,
math
800
x227883
263A
Beautiful Matrix
implementation
800
x223720
112A
Petya and Strings
implementation
,
strings
800
x208341
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197435
281A
Word Capitalization
implementation
,
strings
800
x195310
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192370
118A
String Task
implementation
,
strings
1000
x180679
791A
Bear and Big Brother
implementation
800
x178012
266A
Stones on the Table
implementation
800
x177265
617A
Elephant
math
800
x169377
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166886
59A
Word
implementation
,
strings
800
x161261
69A
Young Physicist
implementation
,
math
1000
x154515
977A
Wrong Subtraction
implementation
800
x154208
96A
Football
implementation
,
strings
900
x148538
110A
Nearly Lucky Number
implementation
800
x141918
734A
Anton and Danik
implementation
,
strings
800
x139443
41A
Translation
implementation
,
strings
800
x134331
116A
Tram
implementation
800
x131573
677A
Vanya and Fence
implementation
800
x130016
271A
Beautiful Year
brute force
800
x127016
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126302
58A
Chat room
greedy
,
strings
1000
x121813
1030A
In Search of an Easy Problem
implementation
800
x119352
122A
Lucky Division
brute force
,
number theory
1000
x115606
467A
George and Accommodation
implementation
800
x113300
344A
Magnets
implementation
800
x111255
160A
Twins
greedy
,
sortings
900
x110479
486A
Calculating Function
implementation
,
math
800
x108920
136A
Presents
implementation
800
x108701
200B
Drinks
implementation
,
math
800
x107325
318A
Even Odds
math
900
x105780
61A
Ultra-Fast Mathematician
implementation
800
x103252
228A
Is your horseshoe on the other hoof?
implementation
800
x101523
133A
HQ9+
implementation
900
x99668
705A
Hulk
implementation
800
x99073
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94047
1328A
Divisibility Problem
math
800
x92899
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90999
520A
Pangram
implementation
,
strings
800
x89389
144A
Arrival of the General
implementation
800
x88667
479A
Expression
brute force
,
math
1000
x88329
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86832
996A
Hit the Lottery
dp
,
greedy
800
x83883
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83694
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83584
208A
Dubstep
strings
900
x83250
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82222
785A
Anton and Polyhedrons
implementation
,
strings
800
x81851
131A
cAPS lOCK
implementation
,
strings
1000
x80981
25A
IQ test
brute force
1300
x80839
268A
Games
brute force
800
x80631
1335A
Candies and Two Sisters
math
800
x78364
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77627
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76755
510A
Fox And Snake
implementation
800
x76618
337A
Puzzles
greedy
900
x75329
230A
Dragons
greedy
,
sortings
1000
x74058
427A
Police Recruits
implementation
800
x72172
1352A
Sum of Round Numbers
implementation
,
math
800
x71511
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70903
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70543
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70400
155A
I_love_\%username\%
brute force
800
x70387
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69613
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66990
581A
Vasya the Hipster
implementation
,
math
800
x66899
339B
Xenia and Ringroad
implementation
1000
x66223
1154A
Restoring Three Numbers
math
800
x66151
151A
Soft Drinking
implementation
,
math
800
x65463
1742A
Sum
implementation
800
x64153
1399A
Remove Smallest
greedy
,
sortings
800
x62500
451A
Game With Sticks
implementation
900
x62456
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62288
189A
Cut Ribbon
brute force
,
dp
1300
x62255
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62176
630A
Again Twenty Five!
number theory
800
x61647
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59981
1512A
Spy Detected!
brute force
,
implementation
800
x59674
466A
Cheap Travel
implementation
1200
x59340
1692A
Marathon
implementation
800
x59337
32B
Borze
expression parsing
,
implementation
800
x58437
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58089
1676A
Lucky?
implementation
800
x57651
758A
Holiday Of Equality
implementation
,
math
800
x57039
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56840
1669A
Division?
implementation
800
x56709
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56488
579A
Raising Bacteria
bitmasks
1000
x55849
1560A
Dislike of Threes
implementation
800
x55655
1807A
Plus or Minus
implementation
800
x55292
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55281
1475A
Odd Divisor
math
,
number theory
900
x54855
1367A
Short Substrings
implementation
,
strings
800
x54672
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