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Codeforces Round 974 (Div. 3)
11:40:21
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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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Custom test
Problems
#
Name
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21676
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1192
797E
Array Queries
brute force
,
data structures
,
dp
2000
x4380
797D
Broken BST
data structures
,
dfs and similar
2100
x1813
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6646
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10503
797A
k-Factorization
implementation
,
math
,
number theory
1100
x15167
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x181
796E
Exam Cheating
binary search
,
dp
2400
x652
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5628
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x3037
796B
Find The Bone
implementation
1300
x9053
796A
Buying A House
brute force
,
implementation
800
x12995
794G
Replace All
combinatorics
,
dp
,
math
3400
x343
794F
Leha and security system
data structures
2800
x817
794E
Choosing Carrot
games
,
math
2800
x798
794D
Labelling Cities
dfs and similar
,
graphs
,
hashing
2400
x813
794C
Naming Company
games
,
greedy
,
sortings
1800
x3103
794B
Cutting Carrot
geometry
,
math
1200
x6516
794A
Bank Robbery
brute force
,
implementation
800
x6998
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x386
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x549
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x251
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1593
793C
Mice problem
geometry
,
implementation
,
math
,
sortings
2300
x1253
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4426
793A
Oleg and shares
implementation
,
math
900
x6760
792F
Mages and Monsters
data structures
,
geometry
3100
x204
792E
Colored Balls
greedy
,
math
,
number theory
2500
x1079
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x3007
792C
Divide by Three
dp
,
greedy
,
math
,
number theory
2000
x4372
792B
Counting-out Rhyme
implementation
1300
x5984
792A
New Bus Route
implementation
,
sortings
1100
x8917
791A
Bear and Big Brother
implementation
800
x192145
789B
Masha and geometric depression
brute force
,
implementation
,
math
1700
x4373
789A
Anastasia and pebbles
implementation
,
math
1100
x9306
788E
New task
data structures
2900
x338
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x368
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2244
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2539
788A
Functions again
dp
,
two pointers
1600
x9083
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5597
787A
The Monster
brute force
,
math
,
number theory
1200
x11326
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x629
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x142
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2821
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5999
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2540
785E
Anton and Permutation
brute force
,
data structures
2200
x1901
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2950
785C
Anton and Fairy Tale
binary search
,
math
1600
x7324
785B
Anton and Classes
greedy
,
sortings
1100
x10207
785A
Anton and Polyhedrons
implementation
,
strings
800
x87974
784G
BF Calculator
*special problem
2000
x744
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x1071
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1944
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x457
784C
INTERCALC
*special problem
,
implementation
1800
x723
784B
Kids' Riddle
*special problem
2000
x868
784A
Numbers Joke
*special problem
1700
x3176
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x118
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x656
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1048
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2553
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2895
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x9081
780B
The Meeting Place Cannot Be Changed
binary search
1600
x9531
780A
Andryusha and Socks
implementation
800
x19424
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11796
779B
Weird Rounding
brute force
,
greedy
1100
x10311
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9305
778E
Selling Numbers
dp
,
sortings
3000
x323
778D
Parquet Re-laying
constructive algorithms
2700
x521
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x884
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2307
778A
String Game
binary search
,
greedy
,
strings
1700
x11510
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x4007
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4979
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6358
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9441
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10267
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x337
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x439
776E
The Holmes Children
math
,
number theory
2100
x2168
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x5046
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5895
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x20646
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12020
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2000
x336
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1268
774J
Stepan's Series
*special problem
,
dp
2000
x360
774I
Composing Of String
*special problem
,
dp
2300
x103
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x256
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x177
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x106
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x213
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1943
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4081
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x219
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