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Codeforces Round (Div. 2)
3 days
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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
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Custom test
Problems
#
Name
1170A
Three Integers Again
*special problem
,
math
x1451
1160A2
Collaboration
*special problem
1115U3
Block unitary
*special problem
1700
x197
1115U2
Chessboard unitary
*special problem
1600
x231
1115U1
Anti-diagonal unitary
*special problem
1500
x253
1115G3
Palindrome checker oracle
*special problem
1600
x228
1115G2
OR oracle
*special problem
1600
x309
1115G1
AND oracle
*special problem
1100
x384
1057C
Tanya and Colored Candies
*special problem
,
dp
2000
x885
1057B
DDoS
*special problem
,
brute force
1400
x1807
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5871
1001I
Deutsch-Jozsa algorithm
*special problem
1700
x398
1001H
Oracle for f(x) = parity of the number of 1s in x
*special problem
1200
x528
1001G
Oracle for f(x) = k-th element of x
*special problem
1400
x533
1001F
Distinguish multi-qubit basis states
*special problem
1300
x533
1001E
Distinguish Bell states
*special problem
1600
x555
1001D
Distinguish plus state and minus state
*special problem
1400
x678
1001C
Generate GHZ state
*special problem
1400
x649
1001B
Generate Bell state
*special problem
1400
x707
1001A
Generate plus state or minus state
*special problem
1100
x1005
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1149
929B
Места в самолёте
*special problem
,
implementation
1300
x2038
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2493
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x804
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x882
928B
Chat
*special problem
,
dp
1400
x2515
928A
Login Verification
*special problem
,
strings
1200
x3357
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
784G
BF Calculator
*special problem
2000
x735
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x1016
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1902
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x433
784C
INTERCALC
*special problem
,
implementation
1800
x691
784B
Kids' Riddle
*special problem
2000
x844
784A
Numbers Joke
*special problem
1700
x3149
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2000
x326
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1260
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
x208
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1932
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4048
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x217
774A
Amusement Park
*special problem
,
ternary search
2100
x297
770D
Draw Brackets!
*special problem
,
implementation
1400
x1569
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2564
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2762
770A
New Password
*special problem
,
implementation
800
x19147
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2259
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2169
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3259
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5615
683J
The Hero with Bombs
*special problem
3000
x40
683I
Loader
*special problem
,
graphs
2500
x38
683H
Exchange of Books
*special problem
1900
x95
683G
The Fraction
*special problem
1900
x130
683F
Reformat the String
*special problem
1800
x146
683E
Hammer throwing
*special problem
1800
x187
683D
Chocolate Bar
*special problem
,
math
1400
x322
683C
Symmetric Difference
*special problem
1600
x314
683B
The Teacher of Physical Education
*special problem
1600
x316
683A
The Check of the Point
*special problem
,
geometry
1200
x787
661H
Rotate Matrix
*special problem
2400
x66
661G
Hungarian Notation
*special problem
2200
x53
661F
Primes in Interval
*special problem
1900
x256
661E
Divisibility Check
*special problem
2000
x81
661D
Maximal Difference
*special problem
2100
x127
661C
Array Sum
*special problem
2000
x129
661B
Seasons
*special problem
1900
x225
661A
Lazy Caterer Sequence
*special problem
1300
x630
656G
You're a Professional
*special problem
1900
x478
656F
Ace It!
*special problem
1900
x889
656E
Out of Controls
*special problem
2000
x721
656D
Rosetta Problem
*special problem
2100
x946
656C
Without Text
*special problem
2000
x683
656B
Scrambled
*special problem
,
implementation
1700
x1638
656A
Da Vinci Powers
*special problem
1900
x3581
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x911
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2618
644A
Parliament of Berland
*special problem
,
constructive algorithms
1000
x4417
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1534
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1948
638A
Home Numbers
*special problem
,
constructive algorithms
,
math
1100
x3789
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1974
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2413
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x15455
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x5345
530I
Different variables
*special problem
2500
x44
530H
Points in triangle
*special problem
,
geometry
2100
x120
530G
Levenshtein distance
*special problem
2100
x150
530F
Jumping frogs
*special problem
2100
x98
530E
Sum and product
*special problem
1700
x303
530D
Set subtraction
*special problem
1600
x449
530C
Diophantine equation
*special problem
1500
x544
530B
String inside out
*special problem
1600
x539
530A
Quadratic equation
*special problem
1500
x670
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