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Codeforces Round 950 (Div. 3)
13:01:07
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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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Custom test
Problems
#
Name
788E
New task
data structures
2900
x332
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x358
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2015
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2299
788A
Functions again
dp
,
two pointers
1600
x8978
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5575
787A
The Monster
brute force
,
math
,
number theory
1200
x11082
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x607
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x138
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2532
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5496
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2310
785E
Anton and Permutation
brute force
,
data structures
2200
x1812
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2659
785C
Anton and Fairy Tale
binary search
,
math
1600
x7219
785B
Anton and Classes
greedy
,
sortings
1100
x10151
785A
Anton and Polyhedrons
implementation
,
strings
800
x83233
784G
BF Calculator
*special problem
2000
x731
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x1003
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1890
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x427
784C
INTERCALC
*special problem
,
implementation
1800
x679
784B
Kids' Riddle
*special problem
2000
x834
784A
Numbers Joke
*special problem
1700
x3131
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x117
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x648
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1024
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2302
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2844
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8872
780B
The Meeting Place Cannot Be Changed
binary search
1600
x9048
780A
Andryusha and Socks
implementation
800
x18735
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11651
779B
Weird Rounding
brute force
,
greedy
1100
x10217
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9240
778E
Selling Numbers
dp
,
sortings
3000
x302
778D
Parquet Re-laying
constructive algorithms
2700
x488
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x867
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2265
778A
String Game
binary search
,
greedy
,
strings
1700
x11161
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3883
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4926
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6290
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9359
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10059
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x334
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x416
776E
The Holmes Children
math
,
number theory
2100
x2107
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4880
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5768
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x19584
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11866
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2000
x324
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1257
774J
Stepan's Series
*special problem
,
dp
2000
x355
774I
Composing Of String
*special problem
,
dp
2300
x101
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x255
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x174
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x105
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x207
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1908
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4035
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x217
774A
Amusement Park
*special problem
,
ternary search
2100
x295
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x185
773E
Blog Post Rating
data structures
,
sortings
3000
x327
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x567
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x938
773B
Dynamic Problem Scoring
brute force
,
greedy
2000
x1144
773A
Success Rate
binary search
,
math
1700
x4384
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x123
772D
Varying Kibibits
bitmasks
,
dp
2700
x573
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1191
772B
Volatile Kite
geometry
1800
x3101
772A
Voltage Keepsake
binary search
,
math
1800
x4081
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x80
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x443
771D
Bear and Company
dp
2500
x1107
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2814
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6641
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14719
770D
Draw Brackets!
*special problem
,
implementation
1400
x1569
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2541
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2737
770A
New Password
*special problem
,
implementation
800
x18908
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2216
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2136
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3239
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5589
768G
The Winds of Winter
binary search
,
data structures
3300
x355
768F
Barrels and boxes
brute force
,
combinatorics
,
math
,
number theory
,
probabilities
2300
x1001
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2655
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2788
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3773
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5855
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x26340
767E
Change-free
greedy
2400
x952
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2199
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x4006
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