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Before contest
Codeforces Round 941 (Div. 1)
11:39:08
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Before contest
Codeforces Round 941 (Div. 2)
11:39:08
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brute force
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
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implementation
interactive
math
matrices
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number theory
probabilities
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ternary search
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Custom test
Problems
#
Name
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17501
1612A
Distance
brute force
,
constructive algorithms
800
x17461
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17320
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16854
1761A
Two Permutations
brute force
,
constructive algorithms
800
x16761
918A
Eleven
brute force
,
implementation
800
x16730
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16440
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16421
1884A
Simple Design
brute force
,
greedy
,
math
800
x16389
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16362
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16023
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x15990
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x15934
919A
Supermarket
brute force
,
greedy
,
implementation
800
x15876
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15831
1236A
Stones
brute force
,
greedy
,
math
800
x15766
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15746
1898A
Milica and String
brute force
,
implementation
,
strings
800
x14978
1415A
Prison Break
brute force
,
math
800
x14915
1271A
Suits
brute force
,
greedy
,
math
800
x14679
908A
New Year and Counting Cards
brute force
,
implementation
800
x14599
47A
Triangular numbers
brute force
,
math
800
x14238
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13767
1060A
Phone Numbers
brute force
800
x13682
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13366
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13089
796A
Buying A House
brute force
,
implementation
800
x12816
1534A
Colour the Flag
brute force
,
implementation
800
x12574
32A
Reconnaissance
brute force
800
x11963
811A
Vladik and Courtesy
brute force
,
implementation
800
x11686
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11681
888A
Local Extrema
brute force
,
implementation
800
x10654
747A
Display Size
brute force
,
math
800
x10028
46A
Ball Game
brute force
,
implementation
800
x8372
157A
Game Outcome
brute force
800
x7404
1250F
Data Center
brute force
,
implementation
800
x7133
794A
Bank Robbery
brute force
,
implementation
800
x6911
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6695
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5888
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83687
1475B
New Year's Number
brute force
,
dp
,
math
900
x46253
1343A
Candies
brute force
,
math
900
x46177
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44174
320A
Magic Numbers
brute force
,
greedy
900
x33490
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32036
1462C
Unique Number
brute force
,
greedy
,
math
900
x31146
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31013
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29521
1555A
PizzaForces
brute force
,
math
900
x27206
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25002
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23582
1380A
Three Indices
brute force
,
data structures
900
x23153
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x22350
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x22257
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21735
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x21512
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21461
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21123
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20444
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20386
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x20243
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20008
6A
Triangle
brute force
,
geometry
900
x19022
1808A
Lucky Numbers
brute force
,
implementation
900
x17273
1351B
Square?
brute force
,
implementation
,
math
900
x16427
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x16393
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16081
1904A
Forked!
brute force
,
implementation
900
x15607
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15277
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15176
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14242
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x13968
215A
Bicycle Chain
brute force
,
implementation
900
x13881
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13731
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13350
841A
Generous Kefa
brute force
,
implementation
900
x12914
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12690
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11817
863A
Quasi-palindrome
brute force
,
implementation
900
x9957
870A
Search for Pretty Integers
brute force
,
implementation
900
x9939
631A
Interview
brute force
,
implementation
900
x9125
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9025
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8509
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8471
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x7991
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5115
122A
Lucky Division
brute force
,
number theory
1000
x115597
479A
Expression
brute force
,
math
1000
x88326
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29598
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28724
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27035
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26711
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x25984
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25775
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25560
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25323
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24568
1607C
Minimum Extraction
brute force
,
sortings
1000
x24272
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24084
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24053
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