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Before contest
Codeforces Round #850 (Div. 1, based on VK Cup 2022 - Final Round)
35:53:00
Register now »
*has extra registration
Before contest
Codeforces Round #850 (Div. 2, based on VK Cup 2022 - Final Round)
35:53:02
Register now »
*has extra registration
→ 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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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x365177
71A
Way Too Long Words
strings
800
x268229
231A
Team
brute force
,
greedy
800
x223806
1A
Theatre Square
math
1000
x197375
158A
Next Round
*special problem
,
implementation
800
x179623
50A
Domino piling
greedy
,
math
800
x174361
282A
Bit++
implementation
800
x172727
263A
Beautiful Matrix
implementation
800
x170458
112A
Petya and Strings
implementation
,
strings
800
x161531
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x151784
281A
Word Capitalization
implementation
,
strings
800
x149043
118A
String Task
implementation
,
strings
1000
x146136
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x144241
266A
Stones on the Table
implementation
800
x137489
791A
Bear and Big Brother
implementation
800
x131749
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x125373
617A
Elephant
math
800
x123678
69A
Young Physicist
implementation
,
math
1000
x121575
59A
Word
implementation
,
strings
800
x120497
96A
Football
implementation
,
strings
900
x117863
977A
Wrong Subtraction
implementation
800
x116255
110A
Nearly Lucky Number
implementation
800
x106818
734A
Anton and Danik
implementation
,
strings
800
x103800
116A
Tram
implementation
800
x103658
41A
Translation
implementation
,
strings
800
x101383
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x101220
58A
Chat room
greedy
,
strings
1000
x98151
677A
Vanya and Fence
implementation
800
x97506
271A
Beautiful Year
brute force
800
x97386
122A
Lucky Division
brute force
,
number theory
1000
x93427
160A
Twins
greedy
,
sortings
900
x89845
1030A
In Search of an Easy Problem
implementation
800
x88681
467A
George and Accommodation
implementation
800
x87713
136A
Presents
implementation
800
x85684
344A
Magnets
implementation
800
x85406
486A
Calculating Function
implementation
,
math
800
x82553
200B
Drinks
implementation
,
math
800
x81974
318A
Even Odds
math
900
x81710
133A
HQ9+
implementation
900
x81236
61A
Ultra-Fast Mathematician
implementation
800
x80674
705A
Hulk
implementation
800
x78085
228A
Is your horseshoe on the other hoof?
implementation
800
x77218
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x73107
469A
I Wanna Be the Guy
greedy
,
implementation
800
x71620
479A
Expression
brute force
,
math
1000
x70727
144A
Arrival of the General
implementation
800
x69893
1328A
Divisibility Problem
math
800
x69417
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x69113
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x68851
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x68515
208A
Dubstep
strings
900
x67717
520A
Pangram
implementation
,
strings
800
x67021
131A
cAPS lOCK
implementation
,
strings
1000
x66903
443A
Anton and Letters
constructive algorithms
,
implementation
800
x65871
268A
Games
brute force
800
x64361
25A
IQ test
brute force
1300
x64353
996A
Hit the Lottery
dp
,
greedy
800
x63815
785A
Anton and Polyhedrons
implementation
,
strings
800
x62883
337A
Puzzles
greedy
900
x62584
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x61823
1335A
Candies and Two Sisters
math
800
x61283
4C
Registration System
data structures
,
hashing
,
implementation
1300
x58510
510A
Fox And Snake
implementation
800
x58458
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x58225
230A
Dragons
greedy
,
sortings
1000
x58155
155A
I_love_\%username\%
brute force
800
x55522
427A
Police Recruits
implementation
800
x55206
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x54920
339B
Xenia and Ringroad
implementation
1000
x54909
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x54481
581A
Vasya the Hipster
implementation
,
math
800
x53510
1352A
Sum of Round Numbers
implementation
,
math
800
x53403
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x52730
451A
Game With Sticks
implementation
900
x52399
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x52236
1154A
Restoring Three Numbers
math
800
x51263
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x50267
189A
Cut Ribbon
brute force
,
dp
1300
x50166
1399A
Remove Smallest
greedy
,
sortings
800
x50094
466A
Cheap Travel
implementation
1200
x47629
151A
Soft Drinking
implementation
,
math
800
x47555
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x47059
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x46101
1367A
Short Substrings
implementation
,
strings
800
x45800
1343B
Balanced Array
constructive algorithms
,
math
800
x45013
758A
Holiday Of Equality
implementation
,
math
800
x44961
1512A
Spy Detected!
brute force
,
implementation
800
x44662
455A
Boredom
dp
1500
x44649
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x44590
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x43512
313A
Ilya and Bank Account
implementation
,
number theory
900
x43352
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x43329
32B
Borze
expression parsing
,
implementation
800
x42981
1560A
Dislike of Threes
implementation
800
x42913
579A
Raising Bacteria
bitmasks
1000
x42836
703A
Mishka and Game
implementation
800
x42479
630A
Again Twenty Five!
number theory
800
x42477
1374A
Required Remainder
math
800
x41890
1367B
Even Array
greedy
,
math
800
x41735
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x41626
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