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Codeforces Round 987 (Div. 2)
09:56:58
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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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Status
Standings
Custom test
Problems
#
Name
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12161
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4095
770A
New Password
*special problem
,
implementation
800
x20006
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3300
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5772
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x27697
767A
Snacktower
data structures
,
implementation
1100
x20402
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33160
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x30670
765C
Table Tennis Game 2
math
1200
x6985
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7135
765A
Neverending competitions
implementation
,
math
900
x9027
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11888
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16363
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14539
760A
Petr and a calendar
implementation
,
math
800
x8214
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10221
758A
Holiday Of Equality
implementation
,
math
800
x61606
757A
Gotta Catch Em' All!
implementation
1000
x11272
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11333
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x18132
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7256
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8717
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x9094
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x76413
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8504
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x49846
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x9013
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8908
747A
Display Size
brute force
,
math
800
x10280
746B
Decoding
implementation
,
strings
900
x28226
746A
Compote
implementation
,
math
800
x21559
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10478
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14818
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x11176
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x43007
740B
Alyona and flowers
constructive algorithms
1200
x8333
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8399
735A
Ostap and Grasshopper
implementation
,
strings
800
x12514
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29460
734A
Anton and Danik
implementation
,
strings
800
x154225
733B
Parade
math
1100
x10683
733A
Grasshopper And the String
implementation
1000
x16175
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9748
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24606
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x73158
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x7989
731A
Night at the Museum
implementation
,
strings
800
x46178
729B
Spotlights
dp
,
implementation
1200
x7983
729A
Interview with Oleg
implementation
,
strings
900
x7492
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x14024
725B
Food on the Plane
implementation
,
math
1200
x5145
725A
Jumping Ball
implementation
1000
x7092
724A
Checking the Calendar
implementation
1000
x7101
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10206
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x79505
722B
Verse Pattern
implementation
,
strings
1200
x6504
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12101
721A
One-dimensional Japanese Crossword
implementation
800
x18605
719A
Vitya in the Countryside
implementation
1100
x15552
717C
Potions Homework
implementation
,
sortings
1200
x3950
716A
Crazy Computer
implementation
800
x22349
714B
Filya and Homework
implementation
,
sortings
1200
x14557
714A
Meeting of Old Friends
implementation
,
math
1100
x10795
712B
Memory and Trident
implementation
,
strings
1100
x9777
712A
Memory and Crow
implementation
,
math
800
x11908
711A
Bus to Udayland
brute force
,
implementation
800
x29537
710A
King Moves
implementation
800
x13849
709A
Juicer
implementation
900
x32554
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x9012
707A
Brain's Photos
implementation
800
x49543
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x64266
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14520
705B
Spider Man
games
,
math
1100
x9173
705A
Hulk
implementation
800
x107977
703A
Mishka and Game
implementation
800
x57137
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x45455
701B
Cells Not Under Attack
data structures
,
math
1200
x11789
701A
Cards
greedy
,
implementation
800
x19676
699A
Launch of Collider
implementation
1000
x16013
697A
Pineapple Incident
implementation
,
math
900
x12813
691A
Fashion in Berland
implementation
1000
x10226
690D1
The Wall (easy)
1200
x2620
690A1
Collective Mindsets (easy)
1100
x2877
688B
Lovely Palindromes
constructive algorithms
,
math
1000
x32380
688A
Opponents
implementation
800
x13981
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7799
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x37828
683A
The Check of the Point
*special problem
,
geometry
1200
x794
682B
Alyona and Mex
sortings
1200
x11540
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x21816
681A
A Good Contest
implementation
800
x15546
680B
Bear and Finding Criminals
constructive algorithms
,
implementation
1000
x24440
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12352
678A
Johny Likes Numbers
implementation
,
math
800
x13355
677A
Vanya and Fence
implementation
800
x143391
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13846
675A
Infinite Sequence
math
1100
x14989
673A
Bear and Game
implementation
800
x10077
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x17424
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