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Codeforces Round 987 (Div. 2)
10:48:08
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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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Status
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Custom test
Problems
#
Name
1676B
Equal Candies
greedy
,
math
,
sortings
800
x49169
1676A
Lucky?
implementation
800
x65301
1675B
Make It Increasing
greedy
,
implementation
900
x27649
1675A
Food for Animals
greedy
,
math
800
x33452
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x23780
1674B
Dictionary
combinatorics
,
math
800
x26525
1674A
Number Transformation
constructive algorithms
,
math
800
x26405
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18469
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15885
1672A
Log Chopping
games
,
implementation
,
math
800
x16134
1671B
Consecutive Points Segment
brute force
,
math
,
sortings
1000
x18614
1671A
String Building
implementation
800
x20548
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15458
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x35150
1669B
Triple
implementation
,
sortings
800
x43945
1669A
Division?
implementation
800
x64739
1668B
Social Distance
greedy
,
math
,
sortings
900
x16767
1668A
Direction Change
implementation
,
math
800
x16354
1666D
Deletive Editing
greedy
900
x8848
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x20795
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23726
1661A
Array Balancing
greedy
,
math
800
x18415
1660B
Vlad and Candies
math
800
x28185
1660A
Vasya and Coins
greedy
,
math
800
x36228
1659A
Red Versus Blue
constructive algorithms
,
greedy
,
implementation
,
math
1000
x19176
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18655
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20373
1657B
XY Sequence
greedy
800
x22870
1657A
Integer Moves
brute force
,
math
800
x24025
1656A
Good Pairs
math
,
sortings
800
x19696
1654B
Prefix Removals
strings
800
x15653
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18693
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x19688
1651A
Playoff
implementation
800
x25744
1650B
DIV + MOD
math
900
x27815
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x34865
1649A
Game
implementation
800
x15583
1647A
Madoka and Math Dad
implementation
,
math
800
x22823
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x21232
1646A
Square Counting
math
800
x24348
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20713
1644A
Doors and Keys
implementation
800
x27440
1642B
Power Walking
greedy
900
x17024
1642A
Hard Way
geometry
800
x16233
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21507
1637A
Sorting Parts
brute force
,
sortings
800
x22401
1635B
Avoid Local Maximums
greedy
800
x17953
1635A
Min Or Sum
bitmasks
,
greedy
800
x23045
1634C
OKEA
constructive algorithms
1000
x18254
1634A
Reverse and Concatenate
greedy
,
strings
800
x23948
1633B
Minority
greedy
800
x27888
1633A
Div. 7
brute force
800
x33441
1632B
Roof Construction
bitmasks
,
constructive algorithms
1000
x22657
1632A
ABC
implementation
800
x29575
1631A
Min Max Swap
greedy
800
x29552
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x23548
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x29326
1627A
Not Shading
constructive algorithms
,
implementation
800
x24059
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x29039
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x17288
1624B
Make AP
implementation
,
math
900
x37379
1624A
Plus One on the Subset
math
800
x52516
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x20083
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x21149
1622A
Construct a Rectangle
geometry
,
math
800
x30221
1621A
Stable Arrangement of Rooks
constructive algorithms
800
x23874
1620B
Triangles on a Rectangle
geometry
,
greedy
,
math
1000
x21537
1620A
Equal or Not Equal
constructive algorithms
,
dsu
,
implementation
800
x21645
1619B
Squares and Cubes
implementation
,
math
800
x31000
1619A
Square String?
implementation
,
strings
800
x52499
1618B
Missing Bigram
implementation
800
x22752
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x32469
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x23558
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16305
1616A
Integer Diversity
implementation
800
x22832
1615A
Closing The Gap
greedy
,
math
800
x20809
1614B
Divan and a New Project
constructive algorithms
,
sortings
1000
x19602
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x23507
1613B
Absent Remainder
greedy
,
implementation
,
sortings
1000
x21789
1613A
Long Comparison
implementation
,
math
900
x24667
1612B
Special Permutation
constructive algorithms
,
greedy
900
x17293
1612A
Distance
brute force
,
constructive algorithms
800
x17701
1611C
Polycarp Recovers the Permutation
constructive algorithms
1000
x18459
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x29789
1611A
Make Even
constructive algorithms
,
math
800
x31577
1610A
Anti Light's Cell Guessing
math
900
x16143
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x17182
1608A
Find Array
constructive algorithms
,
math
800
x19126
1607C
Minimum Extraction
brute force
,
sortings
1000
x25145
1607B
Odd Grasshopper
math
900
x26772
1607A
Linear Keyboard
implementation
,
strings
800
x37615
1606A
AB Balance
strings
900
x25104
1605B
Reverse Sort
greedy
,
sortings
1000
x18123
1605A
A.M. Deviation
math
,
number theory
800
x20679
1604A
Era
greedy
800
x21562
1602A
Two Subsequences
implementation
800
x19047
1598B
Groups
brute force
,
implementation
1000
x16136
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x23522
1594A
Consecutive Sum Riddle
math
800
x24819
1593C
Save More Mice
binary search
,
greedy
,
greedy
1000
x25027
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