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constructive algorithms
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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
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
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two pointers
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Problems
#
Name
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x391
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x389
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x372
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x371
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x368
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x363
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x339
1578A
Anti-Tetris
constructive algorithms
,
graphs
,
shortest paths
2800
x328
1012D
AB-Strings
constructive algorithms
,
strings
2800
x316
1949K
Make Triangle
constructive algorithms
,
math
2800
x232
1267D
DevOps Best Practices
constructive algorithms
2800
x206
74E
Shift It!
constructive algorithms
2800
x142
48H
Black and White
constructive algorithms
2800
x133
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x128
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x642
1622F
Quadratic Set
constructive algorithms
,
hashing
,
math
,
number theory
2900
x595
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x573
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x536
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x508
512E
Fox And Polygon
constructive algorithms
,
divide and conquer
2900
x500
1172D
Nauuo and Portals
constructive algorithms
2900
x482
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x443
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x406
1646F
Playing Around the Table
constructive algorithms
,
greedy
,
implementation
2900
x401
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x370
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x329
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x298
1965D
Missing Subarray Sum
constructive algorithms
2900
x249
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x241
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x218
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x182
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x162
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x98
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x1304
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x1073
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x668
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x643
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x553
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x529
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x501
1545D
AquaMoon and Wrong Coordinate
constructive algorithms
,
interactive
,
math
3000
x461
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x458
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x456
341E
Candies Game
constructive algorithms
,
greedy
3000
x428
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x382
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x356
1063E
Lasers and Mirrors
constructive algorithms
,
math
3000
x330
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x323
1615H
Reindeer Games
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
flows
,
graphs
,
shortest paths
3000
x308
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x302
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x301
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x257
1526F
Median Queries
constructive algorithms
,
interactive
,
probabilities
3000
x252
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x247
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x244
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x183
1758F
Decent Division
constructive algorithms
,
data structures
3000
x154
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x87
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x81
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x64
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x602
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x522
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x443
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x414
804E
The same permutation
constructive algorithms
3100
x409
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x367
1168E
Xor Permutations
constructive algorithms
,
math
3100
x355
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x331
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x328
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x327
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x282
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x272
1864G
Magic Square
combinatorics
,
constructive algorithms
,
implementation
3100
x252
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x235
715D
Create a Maze
constructive algorithms
3100
x234
331E2
Deja Vu
constructive algorithms
,
dp
3100
x216
1740G
Dangerous Laser Power
constructive algorithms
,
dsu
,
sortings
3100
x178
1965E
Connected Cubes
constructive algorithms
,
games
3100
x168
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x152
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x99
720C
Homework
constructive algorithms
3100
x97
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x619
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x601
611H
New Year and Forgotten Tree
constructive algorithms
,
flows
,
graphs
3200
x577
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x464
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x366
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x320
1672G
Cross Xor
constructive algorithms
,
graphs
,
math
,
matrices
3200
x313
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x304
543E
Listening to Music
constructive algorithms
,
data structures
3200
x278
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x270
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x214
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x185
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x170
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x128
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x122
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x119
1267H
Help BerLine
constructive algorithms
3200
x101
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x72
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x43
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