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Codeforces Round (Div. 3)
30:21:50
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Difficulty:
—
greedy
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
#
Name
1749B
Death's Blessing
greedy
900
x20320
1749A
Cowardly Rooks
greedy
,
implementation
800
x21960
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10417
1747A
Two Groups
constructive algorithms
,
greedy
800
x24331
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4415
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12321
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16720
1746A
Maxmina
constructive algorithms
,
greedy
800
x19430
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x20195
1744A
Number Replacement
greedy
,
implementation
800
x26305
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7276
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x18624
1743B
Permutation Value
constructive algorithms
,
greedy
800
x21913
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9794
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x10750
1742E
Scuza
binary search
,
greedy
,
math
1200
x21763
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21509
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44189
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17172
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4099
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10548
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13532
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4860
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21370
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x366
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1147
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10513
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x14726
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13321
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1807
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x9937
1736E
Swap and Take
dp
,
greedy
2600
x636
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2392
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22408
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1021
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9548
1735B
Tea with Tangerines
greedy
,
math
900
x17694
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x19875
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6003
1734C
Removing Smallest Multiples
greedy
,
math
1200
x16812
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20711
1733D2
Zero-One (Hard Version)
dp
,
greedy
2000
x3969
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x12882
1733A
Consecutive Sum
greedy
,
sortings
800
x20650
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2454
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5555
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x13985
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2652
1731B
Kill Demodogs
greedy
,
math
1100
x16709
1731A
Joey Takes Money
greedy
,
math
800
x22110
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16027
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x11801
1730A
Planets
data structures
,
greedy
,
sortings
800
x22495
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18762
1729B
Decode String
greedy
,
strings
800
x29329
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x401
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1649
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15066
1728B
Best Permutation
constructive algorithms
,
greedy
800
x19909
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24338
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x282
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12058
1726A
Mainak and Array
greedy
,
math
900
x19777
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x11618
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10299
1722D
Line
greedy
,
sortings
1100
x22181
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6282
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x12957
1721A
Image
greedy
,
implementation
800
x26573
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x734
1720C
Corners
greedy
,
implementation
1200
x16294
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20743
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x287
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1513
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2872
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x4990
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5482
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4247
1717C
Madoka and Formal Statement
greedy
1300
x14231
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x4004
1716A
2-3 Moves
greedy
,
math
800
x31335
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1600
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x4909
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x20048
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23173
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8581
1714C
Minimum Varied Number
greedy
800
x29900
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29271
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1512
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5434
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21647
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4257
1712C
Sort Zero
greedy
,
sortings
1100
x19199
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21218
1712A
Wonderful Permutation
greedy
,
implementation
800
x23717
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1270
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2350
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10582
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2433
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