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Rayan
→ Pay attention
Before contest
IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
09:17:33
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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
#
Name
187C
Weak Memory
dfs and similar
,
dsu
2000
x1390
187B
AlgoRace
dp
,
shortest paths
1800
x2008
187A
Permutations
greedy
1500
x2857
185E
Soap Time! - 2
binary search
,
data structures
3000
x146
185D
Visit of the Great
math
,
number theory
2600
x451
185C
Clever Fat Rat
dp
2500
x140
185B
Mushroom Scientists
math
,
ternary search
1800
x1675
183E
Candy Shop
greedy
2900
x140
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x409
183C
Cyclic Coloring
dfs and similar
2200
x648
183B
Zoo
brute force
,
geometry
1700
x703
183A
Headquarters
constructive algorithms
,
math
1700
x562
182E
Wooden Fence
dp
1800
x1474
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8192
182C
Optimal Sum
data structures
,
greedy
2000
x750
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x292
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1802
180D
Name
greedy
,
strings
1900
x737
180C
Letter
dp
1400
x7588
180B
Divisibility Rules
math
,
number theory
2300
x355
180A
Defragmentation
implementation
1800
x552
178F3
Representative Sampling
2500
x439
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x356
178F1
Representative Sampling
1800
x410
178E3
The Beaver's Problem - 2
2300
x202
178E2
The Beaver's Problem - 2
2000
x233
178E1
The Beaver's Problem - 2
1900
x292
178D3
Magic Squares
2100
x251
178D2
Magic Squares
1900
x274
178D1
Magic Squares
1500
x654
178C3
Smart Beaver and Resolving Collisions
2000
x328
178C2
Smart Beaver and Resolving Collisions
1900
x310
178C1
Smart Beaver and Resolving Collisions
1600
x497
178B3
Greedy Merchants
1800
x1262
178B2
Greedy Merchants
1600
x685
178B1
Greedy Merchants
1600
x773
177G2
Fibonacci Strings
matrices
,
strings
2600
x207
177G1
Fibonacci Strings
strings
2400
x192
177F2
Script Generation
2300
x211
177F1
Script Generation
1800
x306
177E2
Space Voyage
binary search
1900
x439
177E1
Space Voyage
binary search
1700
x630
177D2
Encrypting Messages
data structures
1500
x2075
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2621
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2618
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1226
176D
Hyper String
dp
2500
x328
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x487
176B
Word Cut
dp
1700
x1892
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x66
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x267
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x301
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1338
175B
Plane of Tanks: Pro
implementation
1400
x1436
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2425
174C
Range Increments
data structures
,
greedy
1800
x1164
174B
File List
dp
,
greedy
,
implementation
1400
x2305
173E
Camping Groups
data structures
,
sortings
2600
x575
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x254
173C
Spiral Maximum
brute force
,
dp
1900
x1003
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x3280
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x272
172D
Calendar Reform
*special problem
,
number theory
1500
x1407
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1151
171H
A polyline
*special problem
,
implementation
1700
x286
171G
Mysterious numbers - 2
*special problem
1600
x944
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1301
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1481
171C
A Piece of Cake
*special problem
,
implementation
2000
x1103
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1225
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x582
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x199
167C
Wizards and Numbers
games
,
math
2300
x682
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2185
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2050
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21805
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x367
166C
Median
greedy
,
math
,
sortings
1500
x6588
166B
Polygons
geometry
,
sortings
2100
x2549
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x7185
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1705
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12491
165B
Burning Midnight Oil
binary search
,
implementation
1500
x18843
164E
Polycarpus and Tasks
3100
x67
164D
Minimum Diameter
binary search
,
brute force
3100
x248
164C
Machine Programming
flows
,
graphs
2400
x906
164B
Ancient Berland Hieroglyphs
two pointers
2000
x479
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1021
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1757
163D
Large Refrigerator
brute force
2900
x516
163C
Conveyor
sortings
,
two pointers
2100
x559
163B
Lemmings
binary search
2000
x1071
163A
Substring and Subsequence
dp
1700
x2745
162J
Brackets
*special problem
1800
x99
162I
Truncatable primes
*special problem
2000
x78
162H
Alternating case
*special problem
1800
x222
162G
Non-decimal sum
*special problem
2000
x67
162F
Factorial zeros
*special problem
1800
x205
162E
HQ9+
*special problem
1800
x179
162D
Remove digits
*special problem
1900
x229
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