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Before contest
Codeforces Round #605 (Div. 3)
6 days
→ Filter Problems
Difficulty:
—
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
1211I
Unusual Graph
*special problem
,
graphs
3000
x12
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3000
x14
1211G
King's Path
*special problem
,
math
,
trees
2500
x34
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2400
x68
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2200
x101
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2200
x126
1211C
Ice Cream
*special problem
,
greedy
,
sortings
2000
x283
1211B
Traveling Around the Golden Ring of Berland
*special problem
,
implementation
1500
x486
1211A
Three Problems
*special problem
,
implementation
1300
x610
1193B
Magic Tree
*special problem
,
data structures
,
dp
,
trees
x166
1193A
Amusement Park
*special problem
,
dp
,
math
x81
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x16
1192A
Building Skyscrapers
*special problem
x34
1192C
Cubeword
*special problem
,
brute force
,
dp
,
meet-in-the-middle
x216
1192B
Dynamic Diameter
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
trees
x228
1170I
Good Subsets
*special problem
,
dp
x16
1170H
Longest Saw
*special problem
,
constructive algorithms
x22
1170G
Graph Decomposition
*special problem
,
graphs
x44
1170F
Wheels
*special problem
,
binary search
,
greedy
x79
1170E
Sliding Doors
*special problem
,
binary search
x181
1170D
Decoding of Integer Sequences
*special problem
,
data structures
,
implementation
x300
1170C
Minus and Minus Give Plus
*special problem
,
implementation
,
strings
x562
1170B
Bad Days
*special problem
,
implementation
x715
1170A
Three Integers Again
*special problem
,
math
x1011
1160A2
Collaboration
*special problem
1115U3
Block unitary
*special problem
2200
x140
1115U2
Chessboard unitary
*special problem
2200
x158
1115U1
Anti-diagonal unitary
*special problem
2200
x176
1115G3
Palindrome checker oracle
*special problem
2200
x153
1115G2
OR oracle
*special problem
2200
x214
1115G1
AND oracle
*special problem
2200
x253
1057C
Tanya and Colored Candies
*special problem
,
dp
2300
x340
1057B
DDoS
*special problem
,
brute force
1800
x1123
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
1700
x2021
1001I
Deutsch-Jozsa algorithm
*special problem
2700
x304
1001H
Oracle for f(x) = parity of the number of 1s in x
*special problem
2500
x385
1001G
Oracle for f(x) = k-th element of x
*special problem
2500
x401
1001F
Distinguish multi-qubit basis states
*special problem
2400
x398
1001E
Distinguish Bell states
*special problem
2400
x416
1001D
Distinguish plus state and minus state
*special problem
2300
x515
1001C
Generate GHZ state
*special problem
2300
x489
1001B
Generate Bell state
*special problem
2000
x530
1001A
Generate plus state or minus state
*special problem
2200
x722
929C
Красивая команда
*special problem
,
combinatorics
,
math
2000
x1023
929B
Места в самолёте
*special problem
,
implementation
1700
x1959
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1600
x2328
928D
Autocompletion
*special problem
,
strings
,
trees
2400
x705
928C
Dependency management
*special problem
,
graphs
,
implementation
2300
x822
928B
Chat
*special problem
,
dp
1800
x1801
928A
Login Verification
*special problem
,
strings
1600
x2477
775A
University Schedule
*special problem
2900
774L
Bars
*special problem
,
binary search
2200
x159
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x982
774J
Stepan's Series
*special problem
,
dp
2100
x243
774I
Composing Of String
*special problem
,
dp
2500
x64
774H
Repairing Of String
*special problem
,
constructive algorithms
2400
x138
774G
Perfectionist Arkadiy
*special problem
,
number theory
2900
x50
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2600
x50
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2400
x132
774D
Lie or Truth
*special problem
,
constructive algorithms
,
sortings
1500
x1449
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
1200
x2160
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2300
x153
774A
Amusement Park
*special problem
,
ternary search
2300
x240
784G
BF Calculator
*special problem
2100
x606
784F
Crunching Numbers Just for You
*special problem
,
implementation
2200
x686
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1419
784D
Touchy-Feely Palindromes
*special problem
,
implementation
2500
x263
784C
INTERCALC
*special problem
,
implementation
2300
x444
784B
Kids' Riddle
*special problem
2300
x555
784A
Numbers Joke
*special problem
1700
x2386
770D
Draw Brackets!
*special problem
,
implementation
1900
x1422
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1900
x1603
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1700
x1938
770A
New Password
*special problem
,
implementation
1500
x5662
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1800
x1545
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1800
x1073
769B
News About Credit
*special problem
,
greedy
,
two pointers
1600
x2673
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
1500
x3590
683J
The Hero with Bombs
*special problem
2900
x24
683I
Loader
*special problem
2600
x24
683H
Exchange of Books
*special problem
2100
x73
683G
The Fraction
*special problem
2100
x107
683F
Reformat the String
*special problem
2000
x118
683E
Hammer throwing
*special problem
1900
x159
683D
Chocolate Bar
*special problem
,
math
1700
x240
683C
Symmetric Difference
*special problem
1600
x262
683B
The Teacher of Physical Education
*special problem
1600
x282
683A
The Check of the Point
*special problem
,
geometry
1200
x550
642A
Scheduler for Invokers
*special problem
2900
661H
Rotate Matrix
*special problem
2600
x34
661G
Hungarian Notation
*special problem
2500
x33
661F
Primes in Interval
*special problem
2200
x71
661E
Divisibility Check
*special problem
2200
x57
661D
Maximal Difference
*special problem
2100
x110
661C
Array Sum
*special problem
2200
x101
661B
Seasons
*special problem
1900
x192
661A
Lazy Caterer Sequence
*special problem
1400
x467
656G
You're a Professional
*special problem
2200
x396
656F
Ace It!
*special problem
2100
x418
656E
Out of Controls
*special problem
2100
x560
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