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Before contest
Codeforces Round 941 (Div. 1)
25:40:11
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Before contest
Codeforces Round 941 (Div. 2)
25:40:11
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brute force
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
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expression parsing
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Problems
#
Name
626A
Robot Sequence
brute force
,
implementation
1000
x6137
284B
Cows and Poker Game
brute force
,
implementation
1000
x6650
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6667
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x6734
29A
Spit Problem
brute force
1000
x6808
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7716
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7809
452A
Eevee
brute force
,
implementation
,
strings
1000
x7889
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x8470
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x8868
816A
Karen and Morning
brute force
,
implementation
1000
x8883
259A
Little Elephant and Chess
brute force
,
strings
1000
x8919
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9129
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9314
1765E
Exchange
brute force
,
math
1000
x9489
886A
ACM ICPC
brute force
1000
x10070
893B
Beautiful Divisors
brute force
,
implementation
1000
x10927
1151A
Maxim and Biology
brute force
,
strings
1000
x10975
1153A
Serval and Bus
brute force
,
math
1000
x11321
535A
Tavas and Nafas
brute force
,
implementation
1000
x11810
122B
Lucky Substring
brute force
,
implementation
1000
x11984
143A
Help Vasilisa the Wise 2
brute force
,
math
1000
x13017
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13176
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13194
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x13408
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14326
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14382
1784A
Monsters (easy version)
brute force
,
greedy
1000
x14425
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14860
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x14996
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15093
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x15680
1598B
Groups
brute force
,
implementation
1000
x15772
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15844
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16206
1704B
Luke is a Foodie
brute force
,
greedy
,
implementation
1000
x16263
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16298
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x16518
462A
Appleman and Easy Task
brute force
,
implementation
1000
x16535
1411B
Fair Numbers
brute force
,
number theory
1000
x17707
1671B
Consecutive Points Segment
brute force
,
math
,
sortings
1000
x18089
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18772
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x18920
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19150
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20142
1499B
Binary Removals
brute force
,
dp
,
greedy
,
implementation
1000
x20221
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x20739
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21022
1770A
Koxia and Whiteboards
brute force
,
greedy
1000
x22824
1790C
Premutation
brute force
,
implementation
,
math
1000
x22866
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x23275
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x23414
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x23900
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24047
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24082
1607C
Minimum Extraction
brute force
,
sortings
1000
x24271
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24565
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25313
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25557
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25769
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x25960
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26705
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27034
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28720
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29594
479A
Expression
brute force
,
math
1000
x88308
122A
Lucky Division
brute force
,
number theory
1000
x115578
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5114
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x7991
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8471
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8508
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9023
631A
Interview
brute force
,
implementation
900
x9125
870A
Search for Pretty Integers
brute force
,
implementation
900
x9938
863A
Quasi-palindrome
brute force
,
implementation
900
x9956
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11816
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12689
841A
Generous Kefa
brute force
,
implementation
900
x12914
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13346
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13729
215A
Bicycle Chain
brute force
,
implementation
900
x13879
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x13966
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14242
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15175
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15272
1904A
Forked!
brute force
,
implementation
900
x15597
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16080
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x16391
1351B
Square?
brute force
,
implementation
,
math
900
x16425
1808A
Lucky Numbers
brute force
,
implementation
900
x17272
6A
Triangle
brute force
,
geometry
900
x19019
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20008
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x20241
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20384
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20443
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21119
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21460
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x21498
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21726
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x22251
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