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Before contest
CodeCraft-22 and Codeforces Round #795 (Div. 2)
2 days
→ Filter Problems
Difficulty:
—
constructive algorithms
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
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x21
1656I
Neighbour Ordering
constructive algorithms
,
graphs
3500
x28
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x38
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x47
1276E
Four Stones
constructive algorithms
3500
x58
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x61
1586I
Omkar and Mosaic
combinatorics
,
constructive algorithms
,
math
3500
x77
1503F
Balance the Cards
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
3500
x85
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x105
1053E
Euler tour
constructive algorithms
,
trees
3500
x151
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x154
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x188
1264F
Beautiful Fibonacci Problem
constructive algorithms
,
number theory
3500
x253
1267C
Cactus Revenge
constructive algorithms
3500
x364
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x37
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x41
1078E
Negative Time Summation
constructive algorithms
3400
x72
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x87
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x89
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x360
737F
Dirty plates
constructive algorithms
,
math
3300
x55
1530G
What a Reversal
constructive algorithms
3300
x88
1615G
Maximum Adjacent Pairs
constructive algorithms
,
graph matchings
3300
x105
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x145
1060H
Sophisticated Device
constructive algorithms
3300
x154
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x158
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x177
1237H
Balanced Reversals
constructive algorithms
3300
x184
1517G
Starry Night Camping
constructive algorithms
,
flows
,
graphs
3300
x240
1375H
Set Merging
constructive algorithms
,
divide and conquer
3300
x247
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x57
1267H
Help BerLine
constructive algorithms
3200
x62
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x67
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x101
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x114
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x129
1672G
Cross Xor
constructive algorithms
,
graphs
,
math
,
matrices
3200
x149
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x154
543E
Listening to Music
constructive algorithms
,
data structures
3200
x159
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x232
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x369
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x372
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x386
611H
New Year and Forgotten Tree
constructive algorithms
,
flows
,
graphs
3200
x411
720C
Homework
constructive algorithms
3100
x78
331E2
Deja Vu
constructive algorithms
,
dp
3100
x120
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x120
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x157
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x159
1168E
Xor Permutations
constructive algorithms
,
math
3100
x182
715D
Create a Maze
constructive algorithms
3100
x184
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x232
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x236
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x243
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x259
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x295
804E
The same permutation
constructive algorithms
3100
x334
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x344
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x407
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x30
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x51
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x63
1526F
Median Queries
constructive algorithms
,
interactive
,
probabilities
3000
x151
1615H
Reindeer Games
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
flows
,
graphs
,
shortest paths
3000
x173
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x237
1063E
Lasers and Mirrors
constructive algorithms
,
math
3000
x262
1545D
AquaMoon and Wrong Coordinate
constructive algorithms
,
interactive
,
math
3000
x297
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x299
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x305
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x319
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x324
341E
Candies Game
constructive algorithms
,
greedy
3000
x328
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x336
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x381
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x791
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x798
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x84
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x153
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x184
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x199
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x214
1646F
Playing Around the Table
constructive algorithms
,
greedy
,
implementation
2900
x224
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x275
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x308
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x316
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x330
1622F
Quadratic Set
constructive algorithms
,
hashing
,
math
,
number theory
2900
x352
512E
Fox And Polygon
constructive algorithms
,
divide and conquer
2900
x363
1172D
Nauuo and Portals
constructive algorithms
2900
x364
48H
Black and White
constructive algorithms
2800
x104
74E
Shift It!
constructive algorithms
2800
x105
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x106
1685D1
Permutation Weight (Easy Version)
constructive algorithms
,
dfs and similar
,
dsu
2800
x155
1267D
DevOps Best Practices
constructive algorithms
2800
x166
1012D
AB-Strings
constructive algorithms
,
strings
2800
x237
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x258
1578A
Anti-Tetris
constructive algorithms
,
graphs
,
shortest paths
2800
x260
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x273
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x299
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x302
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