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Rayan
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Educational Codeforces Round 173 (Rated for Div. 2)
00:18:50
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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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Custom test
Problems
#
Name
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1517
610C
Harmony Analysis
constructive algorithms
1800
x2888
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7344
610A
Pasha and Stick
combinatorics
,
math
1000
x23752
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1273
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x8139
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2779
609C
Load Balancing
implementation
,
math
1500
x6703
609B
The Best Gift
constructive algorithms
,
implementation
1100
x9265
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x17694
608B
Hamming Distance Sum
combinatorics
,
strings
1500
x6914
608A
Saitama Destroys Hotel
implementation
,
math
1000
x9400
607E
Cross Sum
binary search
,
geometry
3300
x256
607D
Power Tree
data structures
,
trees
2600
x578
607C
Marbles
hashing
,
strings
2500
x804
607B
Zuma
dp
1900
x12614
607A
Chain Reaction
binary search
,
dp
1600
x9704
606B
Testing Robots
implementation
1600
x2772
606A
Magic Spheres
implementation
1200
x8009
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1402
605D
Board Game
data structures
,
dfs and similar
2500
x810
605C
Freelancer's Dreams
geometry
2400
x1128
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3502
605A
Sorting Railway Cars
constructive algorithms
,
greedy
1600
x7184
604B
More Cowbell
binary search
,
greedy
1400
x8538
604A
Uncowed Forces
implementation
1000
x9014
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1330
603D
Ruminations on Ruminants
geometry
,
math
2900
x341
603C
Lieges of Legendre
games
,
math
2200
x1899
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2592
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7713
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10994
602A
Two Bases
brute force
,
implementation
1100
x8547
601E
A Museum Robbery
data structures
,
dp
2800
x880
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1164
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1339
601B
Lipshitz Sequence
data structures
,
math
2100
x2336
601A
The Two Routes
graphs
,
shortest paths
1600
x12215
600F
Edge coloring of bipartite graph
graphs
2800
x846
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x14399
600D
Area of Two Circles' Intersection
geometry
2000
x2340
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x6332
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x30917
600A
Extract Numbers
implementation
,
strings
1600
x5354
599E
Sandy and Nuts
bitmasks
,
dp
,
trees
2600
x679
599D
Spongebob and Squares
brute force
,
math
1900
x2598
599C
Day at the Beach
sortings
1600
x4672
599B
Spongebob and Joke
implementation
1500
x4419
599A
Patrick and Shopping
implementation
800
x29375
598F
Cut Length
geometry
2900
x383
598E
Chocolate Bar
brute force
,
dp
2000
x5138
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x11360
598C
Nearest vectors
geometry
,
sortings
2300
x4527
598B
Queries on a String
implementation
,
strings
1300
x11302
598A
Tricky Sum
math
900
x27138
597C
Subsequences
data structures
,
dp
1900
x5181
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4956
597A
Divisibility
math
1600
x4562
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x395
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x689
596C
Wilbur and Points
combinatorics
,
greedy
,
sortings
1700
x2259
596B
Wilbur and Array
greedy
,
implementation
1100
x10419
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7777
595B
Pasha and Phone
binary search
,
math
1600
x2929
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14643
594E
Cutting the Line
string suffix structures
,
strings
3100
x162
594D
REQ
data structures
,
number theory
2500
x1673
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x690
594B
Max and Bike
binary search
,
geometry
2500
x501
594A
Warrior and Archer
games
2300
x1738
593E
Strange Calculation and Cats
dp
,
matrices
2400
x646
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1272
593C
Beautiful Function
constructive algorithms
,
math
2200
x285
593B
Anton and Lines
geometry
,
sortings
1600
x4064
593A
2Char
brute force
,
implementation
1200
x5820
592E
BCPC
binary search
,
geometry
,
two pointers
2700
x216
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2661
592C
The Big Race
math
1800
x3082
592B
The Monster and the Squirrel
math
1100
x8645
592A
PawnChess
implementation
1200
x6370
591B
Rebranding
implementation
,
strings
1200
x8284
591A
Wizards' Duel
implementation
,
math
900
x14662
590E
Birthday
graph matchings
,
strings
3200
x792
590D
Top Secret Task
dp
2300
x1228
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2851
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1919
590A
Median Smoothing
implementation
1700
x3983
588B
Duff in Love
math
1300
x14196
588A
Duff and Meat
greedy
900
x23078
587F
Duff is Mad
data structures
,
strings
3000
x1076
587E
Duff as a Queen
data structures
2900
x726
587D
Duff in Mafia
2-sat
,
binary search
3100
x763
587C
Duff in the Army
data structures
,
trees
2200
x4024
587B
Duff in Beach
dp
2100
x1427
587A
Duff and Weight Lifting
greedy
1500
x7671
586B
Laurenty and Shop
implementation
1300
x5157
586A
Alena's Schedule
implementation
900
x10198
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x690
585E
Present for Vitalik the Philatelist
combinatorics
,
math
,
number theory
2900
x1122
585D
Lizard Era: Beginning
meet-in-the-middle
2300
x1661
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