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Before contest
Codeforces Round 941 (Div. 1)
2 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
→ 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
x479096
71A
Way Too Long Words
strings
800
x351825
231A
Team
brute force
,
greedy
800
x297712
1A
Theatre Square
math
1000
x244854
282A
Bit++
implementation
800
x234761
158A
Next Round
*special problem
,
implementation
800
x231487
50A
Domino piling
greedy
,
math
800
x227717
263A
Beautiful Matrix
implementation
800
x223517
112A
Petya and Strings
implementation
,
strings
800
x208170
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197272
281A
Word Capitalization
implementation
,
strings
800
x195160
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192177
118A
String Task
implementation
,
strings
1000
x180562
791A
Bear and Big Brother
implementation
800
x177795
266A
Stones on the Table
implementation
800
x177092
617A
Elephant
math
800
x169182
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166655
59A
Word
implementation
,
strings
800
x161126
69A
Young Physicist
implementation
,
math
1000
x154419
977A
Wrong Subtraction
implementation
800
x154095
96A
Football
implementation
,
strings
900
x148425
110A
Nearly Lucky Number
implementation
800
x141808
734A
Anton and Danik
implementation
,
strings
800
x139252
41A
Translation
implementation
,
strings
800
x134163
116A
Tram
implementation
800
x131486
677A
Vanya and Fence
implementation
800
x129872
271A
Beautiful Year
brute force
800
x126913
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126229
58A
Chat room
greedy
,
strings
1000
x121721
1030A
In Search of an Easy Problem
implementation
800
x119213
122A
Lucky Division
brute force
,
number theory
1000
x115521
467A
George and Accommodation
implementation
800
x113229
344A
Magnets
implementation
800
x111154
160A
Twins
greedy
,
sortings
900
x110387
486A
Calculating Function
implementation
,
math
800
x108835
136A
Presents
implementation
800
x108606
200B
Drinks
implementation
,
math
800
x107239
318A
Even Odds
math
900
x105683
61A
Ultra-Fast Mathematician
implementation
800
x103173
228A
Is your horseshoe on the other hoof?
implementation
800
x101445
133A
HQ9+
implementation
900
x99605
705A
Hulk
implementation
800
x98974
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x93950
1328A
Divisibility Problem
math
800
x92796
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90923
520A
Pangram
implementation
,
strings
800
x89307
144A
Arrival of the General
implementation
800
x88603
479A
Expression
brute force
,
math
1000
x88268
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86785
996A
Hit the Lottery
dp
,
greedy
800
x83804
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83635
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83510
208A
Dubstep
strings
900
x83183
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82175
785A
Anton and Polyhedrons
implementation
,
strings
800
x81761
131A
cAPS lOCK
implementation
,
strings
1000
x80927
25A
IQ test
brute force
1300
x80777
268A
Games
brute force
800
x80558
1335A
Candies and Two Sisters
math
800
x78300
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77575
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76687
510A
Fox And Snake
implementation
800
x76487
337A
Puzzles
greedy
900
x75281
230A
Dragons
greedy
,
sortings
1000
x73999
427A
Police Recruits
implementation
800
x72105
1352A
Sum of Round Numbers
implementation
,
math
800
x71419
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70860
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70493
155A
I_love_\%username\%
brute force
800
x70346
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70334
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69564
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66917
581A
Vasya the Hipster
implementation
,
math
800
x66851
339B
Xenia and Ringroad
implementation
1000
x66191
1154A
Restoring Three Numbers
math
800
x66095
151A
Soft Drinking
implementation
,
math
800
x65392
1742A
Sum
implementation
800
x64047
1399A
Remove Smallest
greedy
,
sortings
800
x62454
451A
Game With Sticks
implementation
900
x62405
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62242
189A
Cut Ribbon
brute force
,
dp
1300
x62216
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62044
630A
Again Twenty Five!
number theory
800
x61567
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59884
1512A
Spy Detected!
brute force
,
implementation
800
x59594
1692A
Marathon
implementation
800
x59273
466A
Cheap Travel
implementation
1200
x59272
32B
Borze
expression parsing
,
implementation
800
x58371
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58005
1676A
Lucky?
implementation
800
x57584
758A
Holiday Of Equality
implementation
,
math
800
x56991
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56807
1669A
Division?
implementation
800
x56608
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56443
579A
Raising Bacteria
bitmasks
1000
x55796
1560A
Dislike of Threes
implementation
800
x55608
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55229
1807A
Plus or Minus
implementation
800
x55216
1475A
Odd Divisor
math
,
number theory
900
x54809
1367A
Short Substrings
implementation
,
strings
800
x54642
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