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Kotlin Heroes: Practice 10
06:17:20
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Difficulty:
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implementation
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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Problems
#
Name
1833A
Musical Puzzle
implementation
,
strings
800
x31557
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1788
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2788
1832C
Contrast Value
greedy
,
implementation
1200
x18217
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9374
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18166
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24151
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27082
1829B
Blank Space
implementation
800
x40733
1829A
Love Story
implementation
,
strings
800
x45810
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1498
1826A
Trust Nobody
brute force
,
greedy
,
implementation
,
sortings
1200
x14493
1824A
LuoTianyi and the Show
greedy
,
implementation
1400
x10783
1822A
TubeTube Feed
brute force
,
implementation
800
x23613
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13586
1820A
Yura's New Name
implementation
,
strings
800
x16344
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1394
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3428
1818A
Politics
greedy
,
implementation
800
x12700
1817D
Toy Machine
constructive algorithms
,
games
,
implementation
2700
x666
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2842
1814A
Coins
implementation
,
math
800
x25613
1812G
Colour Vision
*special problem
,
implementation
x523
1812B
Was it Rated?
*special problem
,
*special problem
,
*special problem
,
brute force
,
implementation
x5569
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1726
1811D
Umka and a Long Flight
constructive algorithms
,
implementation
,
math
1600
x7028
1811B
Conveyor Belts
implementation
,
math
1000
x19710
1809F
Traveling in Berland
binary search
,
data structures
,
graphs
,
greedy
,
implementation
2500
x704
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x789
1809A
Garland
implementation
800
x23411
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3578
1808A
Lucky Numbers
brute force
,
implementation
900
x17311
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17659
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17817
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5867
1807E
Interview
binary search
,
implementation
,
interactive
1300
x11846
1807D
Odd Queries
data structures
,
implementation
900
x28627
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29141
1807A
Plus or Minus
implementation
800
x55678
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x813
1804G
Flow Control
data structures
,
dsu
,
implementation
3500
x193
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4415
1804B
Vaccination
greedy
,
implementation
1000
x13775
1802B
Settlement of Guinea Pigs
greedy
,
implementation
,
math
1000
x12899
1802A
Likes
greedy
,
implementation
800
x15510
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1929
1800A
Is It a Cat?
implementation
,
strings
800
x29981
1799E
City Union
constructive algorithms
,
dfs and similar
,
dsu
,
geometry
,
greedy
,
implementation
,
math
2300
x1153
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11355
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15873
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19326
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3697
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x16930
1796B
Asterisk-Minor Template
implementation
,
strings
1000
x16026
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18561
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11390
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23228
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1004
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1275
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5755
1791C
Prepend and Append
implementation
,
two pointers
800
x40500
1791B
Following Directions
geometry
,
implementation
800
x41805
1791A
Codeforces Checking
implementation
,
strings
800
x54918
1790C
Premutation
brute force
,
implementation
,
math
1000
x22929
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35614
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x517
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x760
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1570
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8061
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15768
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x788
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19237
1788A
One and Two
brute force
,
implementation
,
math
800
x27533
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x628
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3257
1786A2
Alternating Deck (hard version)
implementation
800
x11229
1786A1
Non-alternating Deck (easy version)
implementation
800
x13606
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x407
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4174
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1265
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7038
1778A
Flip Flop Sum
greedy
,
implementation
800
x23754
1775E
The Human Equation
greedy
,
implementation
2100
x3025
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19307
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x640
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1019
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7417
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x453
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x729
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1267
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2229
1772B
Matrix Rotation
brute force
,
implementation
800
x28168
1772A
A+B?
implementation
800
x43964
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x657
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3665
1769B1
Копирование файлов I
*special problem
,
brute force
,
implementation
,
math
1000
x1310
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13544
1767A
Cut the Triangle
implementation
800
x20130
1766C
Hamiltonian Wall
dp
,
implementation
1300
x13080
1766B
Notepad#
implementation
1000
x20083
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