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Pinely Round 4 (Div. 1 + Div. 2)
08:18:18
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Difficulty:
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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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Status
Standings
Custom test
Problems
#
Name
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x242
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x497
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x571
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x617
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1410
1285F
Classical?
binary search
,
combinatorics
,
number theory
2900
x1112
1284G
Seollal
graphs
3300
x169
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x315
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1290
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x1139
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x60
1280E
Kirchhoff's Current Loss
math
2900
x199
1280D
Miss Punyverse
dp
,
greedy
,
trees
2500
x978
1279F
New Year and Handle Change
binary search
,
dp
2800
x850
1279E
New Year Permutations
combinatorics
,
dp
2700
x360
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1811
1276F
Asterisk Substrings
string suffix structures
3400
x336
1276E
Four Stones
constructive algorithms
3500
x82
1276D
Tree Elimination
dp
,
trees
2900
x523
1271F
Divide The Students
brute force
2700
x190
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x233
1270H
Number of Components
data structures
3300
x679
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2141
1270F
Awesome Substrings
math
,
strings
2600
x1120
1268E
Happy Cactus
dp
3400
x242
1268D
Invertation in Tournament
brute force
,
divide and conquer
,
graphs
,
math
3200
x490
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x870
1267H
Help BerLine
constructive algorithms
3200
x141
1267G
Game Relics
math
,
probabilities
3000
x637
1267F
Foolprüf Security
graphs
2600
x644
1267D
DevOps Best Practices
constructive algorithms
2800
x209
1267C
Cactus Revenge
constructive algorithms
3500
x379
1267A
Apprentice Learning Trajectory
2400
x965
1266H
Red-Blue Graph
dp
,
graphs
,
math
,
matrices
,
meet-in-the-middle
3400
x102
1266G
Permutation Concatenation
string suffix structures
3300
x118
1266F
Almost Same Distance
dfs and similar
,
graphs
2900
x334
1264F
Beautiful Fibonacci Problem
constructive algorithms
,
number theory
3500
x904
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x776
1264D2
Beautiful Bracket Sequence (hard version)
combinatorics
,
probabilities
2900
x882
1264D1
Beautiful Bracket Sequence (easy version)
combinatorics
,
dp
,
probabilities
2600
x1208
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1133
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x864
1261F
Xor-Set
bitmasks
,
divide and conquer
,
math
3100
x378
1260F
Colored Tree
data structures
,
trees
2700
x493
1260E
Tournament
brute force
,
dp
,
greedy
2400
x1693
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x594
1257F
Make Them Similar
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
2400
x1982
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x263
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x1188
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1644
1252I
Mission Possible
3000
x31
1252F
Regular Forestation
hashing
,
trees
2400
x909
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x334
1251F
Red-White Fence
combinatorics
,
fft
2500
x808
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2568
1250M
SmartGarden
constructive algorithms
,
divide and conquer
2500
x356
1250K
Projectors
flows
,
graphs
3100
x187
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x130
1250D
Conference Problem
dp
3000
x174
1246F
Cursor Distance
3500
x161
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x1325
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x130
1242D
Number Discovery
math
3400
x189
1242C
Sum Balance
bitmasks
,
dfs and similar
,
dp
,
graphs
2400
x1623
1240F
Football
graphs
3100
x244
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x249
1239E
Turtle
dp
,
implementation
3100
x928
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x1941
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x1031
1238G
Adilbek and the Watering System
data structures
,
greedy
,
sortings
2700
x401
1237H
Balanced Reversals
constructive algorithms
3300
x369
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x121
1237F
Balanced Domino Placements
combinatorics
,
dp
2600
x849
1237E
Balanced Binary Search Trees
dp
,
math
2400
x1277
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x173
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x644
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x422
1227G
Not Same
constructive algorithms
2600
x981
1227F2
Wrong Answer on test 233 (Hard Version)
combinatorics
,
math
2400
x1479
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x536
1225F
Tree Factory
constructive algorithms
,
greedy
,
trees
2500
x875
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x229
1223F
Stack Exterminable Arrays
data structures
,
divide and conquer
,
dp
,
hashing
2600
x2000
1221G
Graph And Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
meet-in-the-middle
2900
x572
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x1026
1221E
Game With String
games
2500
x1029
1220G
Geolocation
geometry
3400
x50
1220F
Gardener Alex
binary search
,
data structures
2700
x675
1218H
Function Composition
dfs and similar
2900
x110
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x94
1218E
Product Tuples
divide and conquer
,
fft
2500
x362
1218D
Xor Spanning Tree
divide and conquer
,
fft
,
graphs
2400
x493
1218C
Jumping Transformers
dp
2600
x173
1218B
Guarding warehouses
data structures
,
geometry
3000
x70
1218A
BubbleReactor
dp
,
graphs
2800
x124
1217F
Forced Online Queries Problem
data structures
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x562
1215F
Radio Stations
2-sat
2700
x951
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x379
1214G
Feeling Good
bitmasks
,
data structures
3200
x286
1214F
Employment
greedy
,
sortings
2700
x426
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