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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
20:15:02
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combine-tags-by-or
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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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Custom test
Problems
#
Name
207B2
Military Trainings
1900
x181
207A3
Beaver's Calculator 1.0
greedy
2000
x206
207A2
Beaver's Calculator 1.0
greedy
1800
x227
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1130
204D
Little Elephant and Retro Strings
dp
2400
x446
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1090
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x279
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1407
202B
Brand New Easy Problem
brute force
1700
x811
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x408
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x399
201C
Fragile Bridges
dp
2000
x1301
201B
Guess That Car!
math
,
ternary search
1800
x1257
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x2982
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x340
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x900
200C
Football Championship
brute force
,
implementation
1800
x1046
200A
Cinema
brute force
,
data structures
2400
x675
199B
Special Olympics
geometry
1900
x787
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x405
198D
Cube Snake
constructive algorithms
2700
x105
198C
Delivering Carcinogen
binary search
,
geometry
2400
x370
198A
About Bacteria
implementation
,
math
1700
x3126
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x843
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x525
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x805
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2149
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x693
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x1012
195C
Try and Catch
expression parsing
,
implementation
1800
x1130
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x326
193D
Two Segments
data structures
2900
x389
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x508
193B
Xor
brute force
2000
x999
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x3890
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x818
191D
Metro Scheme
graphs
,
greedy
2700
x349
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6963
191B
Demonstration
greedy
1700
x1001
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1466
190D
Non-Secret Cypher
two pointers
1900
x2255
190B
Surrounded
geometry
1800
x2804
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x246
187E
Heaven Tour
data structures
,
greedy
2900
x97
187D
BRT Contract
data structures
2800
x504
187C
Weak Memory
dfs and similar
,
dsu
2000
x1307
187B
AlgoRace
dp
,
shortest paths
1800
x1948
185E
Soap Time! - 2
binary search
,
data structures
3000
x104
185D
Visit of the Great
math
,
number theory
2600
x391
185C
Clever Fat Rat
dp
2500
x133
185B
Mushroom Scientists
math
,
ternary search
1800
x1609
183E
Candy Shop
greedy
2900
x134
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x400
183C
Cyclic Coloring
dfs and similar
2200
x603
183B
Zoo
brute force
,
geometry
1700
x685
183A
Headquarters
constructive algorithms
,
math
1700
x535
182E
Wooden Fence
dp
1800
x1441
182C
Optimal Sum
data structures
,
greedy
2000
x713
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x280
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1741
180D
Name
greedy
,
strings
1900
x718
180B
Divisibility Rules
math
,
number theory
2300
x331
180A
Defragmentation
implementation
1800
x526
178F3
Representative Sampling
2500
x412
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x322
178F1
Representative Sampling
1800
x378
178E3
The Beaver's Problem - 2
2300
x201
178E2
The Beaver's Problem - 2
2000
x230
178E1
The Beaver's Problem - 2
1900
x289
178D3
Magic Squares
2100
x242
178D2
Magic Squares
1900
x267
178C3
Smart Beaver and Resolving Collisions
2000
x299
178C2
Smart Beaver and Resolving Collisions
1900
x289
178B3
Greedy Merchants
1800
x1138
177G2
Fibonacci Strings
matrices
,
strings
2600
x177
177G1
Fibonacci Strings
strings
2400
x170
177F2
Script Generation
2300
x204
177F1
Script Generation
1800
x297
177E2
Space Voyage
binary search
1900
x416
177E1
Space Voyage
binary search
1700
x591
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1093
176D
Hyper String
dp
2500
x305
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x469
176B
Word Cut
dp
1700
x1735
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x65
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x261
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x296
174C
Range Increments
data structures
,
greedy
1800
x1074
173E
Camping Groups
data structures
,
sortings
2600
x540
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x247
173C
Spiral Maximum
brute force
,
dp
1900
x968
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2952
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x269
171H
A polyline
*special problem
,
implementation
1700
x273
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1435
171C
A Piece of Cake
*special problem
,
implementation
2000
x1068
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1208
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x551
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x192
167C
Wizards and Numbers
games
,
math
2300
x659
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