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Codeforces Round 1002 (Div. 2)
3 days
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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
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
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Custom test
Problems
#
Name
203C
Photographer
greedy
,
sortings
1400
x5744
203B
Game on Paper
brute force
,
implementation
1300
x2623
203A
Two Problems
brute force
,
implementation
1200
x4215
202B
Brand New Easy Problem
brute force
1700
x822
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x17357
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x429
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x420
201C
Fragile Bridges
dp
2000
x1387
201B
Guess That Car!
math
,
ternary search
1800
x1308
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x3027
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x345
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x920
200C
Football Championship
brute force
,
implementation
1800
x1064
200B
Drinks
implementation
,
math
800
x122780
200A
Cinema
brute force
,
data structures
2400
x695
199B
Special Olympics
geometry
1900
x808
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x27264
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x452
198D
Cube Snake
constructive algorithms
2700
x107
198C
Delivering Carcinogen
binary search
,
geometry
2400
x379
198B
Jumping on Walls
shortest paths
1400
x4442
198A
About Bacteria
implementation
,
math
1700
x3176
197B
Limit
math
1400
x4682
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6447
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x1045
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x545
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x972
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2246
196A
Lexicographically Maximum Subsequence
greedy
,
strings
1100
x5469
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x736
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x1050
195C
Try and Catch
expression parsing
,
implementation
1800
x1150
195B
After Training
data structures
,
implementation
,
math
1300
x5234
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x9195
194B
Square
math
1200
x3595
194A
Exams
implementation
,
math
900
x10085
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x345
193D
Two Segments
data structures
2900
x563
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x517
193B
Xor
brute force
2000
x1021
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x4076
192B
Walking in the Rain
brute force
,
implementation
1100
x6341
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10524
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x868
191D
Metro Scheme
graphs
,
greedy
2700
x366
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x7460
191B
Demonstration
greedy
1700
x1016
191A
Dynasty Puzzles
dp
1500
x4100
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1573
190D
Non-Secret Cypher
two pointers
1900
x2369
190C
STL
dfs and similar
1500
x2916
190B
Surrounded
geometry
1800
x2885
190A
Vasya and the Bus
greedy
,
math
1100
x5921
189B
Counting Rhombi
brute force
,
math
1300
x3978
189A
Cut Ribbon
brute force
,
dp
1300
x69378
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x268
188G
Array Sorting
*special problem
,
implementation
1600
x337
188F
Binary Notation
*special problem
,
implementation
1400
x307
188E
HQ9+
*special problem
,
implementation
1400
x506
188D
Asterisks
*special problem
,
implementation
1100
x688
188C
LCM
*special problem
,
implementation
,
math
1400
x460
188B
A + Reverse B
*special problem
,
implementation
1300
x744
188A
Hexagonal Numbers
*special problem
1100
x787
187E
Heaven Tour
data structures
,
greedy
2900
x104
187D
BRT Contract
data structures
2800
x540
187C
Weak Memory
dfs and similar
,
dsu
2000
x1391
187B
AlgoRace
dp
,
shortest paths
1800
x2009
187A
Permutations
greedy
1500
x2861
186B
Growing Mushrooms
greedy
,
sortings
1200
x5683
186A
Comparing Strings
implementation
,
strings
1100
x17323
185E
Soap Time! - 2
binary search
,
data structures
3000
x146
185D
Visit of the Great
math
,
number theory
2600
x457
185C
Clever Fat Rat
dp
2500
x142
185B
Mushroom Scientists
math
,
ternary search
1800
x1681
185A
Plant
math
1300
x6008
183E
Candy Shop
greedy
2900
x140
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x410
183C
Cyclic Coloring
dfs and similar
2200
x648
183B
Zoo
brute force
,
geometry
1700
x703
183A
Headquarters
constructive algorithms
,
math
1700
x563
182E
Wooden Fence
dp
1800
x1491
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8197
182C
Optimal Sum
data structures
,
greedy
2000
x751
182B
Vasya's Calendar
implementation
1000
x6997
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x292
181B
Number of Triplets
binary search
,
brute force
1300
x3086
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x7441
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2556
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1829
180D
Name
greedy
,
strings
1900
x737
180C
Letter
dp
1400
x7603
180B
Divisibility Rules
math
,
number theory
2300
x364
180A
Defragmentation
implementation
1800
x553
178F3
Representative Sampling
2500
x441
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x359
178F1
Representative Sampling
1800
x412
178E3
The Beaver's Problem - 2
2300
x203
178E2
The Beaver's Problem - 2
2000
x234
178E1
The Beaver's Problem - 2
1900
x293
178D3
Magic Squares
2100
x251
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