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Codeforces Round 961 (Div. 2)
21:13:21
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→ Filter Problems
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
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x280
181B
Number of Triplets
binary search
,
brute force
1300
x2935
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6846
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2482
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1743
180D
Name
greedy
,
strings
1900
x720
180C
Letter
dp
1400
x7204
180B
Divisibility Rules
math
,
number theory
2300
x331
180A
Defragmentation
implementation
1800
x528
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
x243
178D2
Magic Squares
1900
x267
178D1
Magic Squares
1500
x623
178C3
Smart Beaver and Resolving Collisions
2000
x300
178C2
Smart Beaver and Resolving Collisions
1900
x292
178C1
Smart Beaver and Resolving Collisions
1600
x475
178B3
Greedy Merchants
1800
x1138
178B2
Greedy Merchants
1600
x654
178B1
Greedy Merchants
1600
x738
178A3
Educational Game
greedy
1100
x1409
178A2
Educational Game
greedy
1000
x1596
178A1
Educational Game
1000
x1572
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
177D2
Encrypting Messages
data structures
1500
x1865
177D1
Encrypting Messages
brute force
1200
x2104
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2493
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2505
177B2
Rectangular Game
number theory
1200
x2899
177B1
Rectangular Game
number theory
1000
x4084
177A2
Good Matrix Elements
implementation
800
x7158
177A1
Good Matrix Elements
implementation
800
x8362
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1095
176D
Hyper String
dp
2500
x305
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x470
176B
Word Cut
dp
1700
x1738
176A
Trading Business
greedy
,
sortings
1200
x1431
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
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1302
175B
Plane of Tanks: Pro
implementation
1400
x1389
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2363
174C
Range Increments
data structures
,
greedy
1800
x1075
174B
File List
dp
,
greedy
,
implementation
1400
x2213
174A
Problem About Equation
math
1100
x2755
173E
Camping Groups
data structures
,
sortings
2600
x540
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x247
173C
Spiral Maximum
brute force
,
dp
1900
x969
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2965
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2254
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x269
172D
Calendar Reform
*special problem
,
number theory
1500
x1388
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1132
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2700
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x6013
171H
A polyline
*special problem
,
implementation
1700
x273
171G
Mysterious numbers - 2
*special problem
1600
x911
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1262
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1435
171D
Broken checker
*special problem
,
brute force
1300
x2550
171C
A Piece of Cake
*special problem
,
implementation
2000
x1068
171B
Star
*special problem
,
combinatorics
1300
x3998
171A
Mysterious numbers - 1
*special problem
,
constructive algorithms
1200
x4411
169B
Replacing Digits
greedy
1100
x3228
169A
Chores
sortings
800
x6636
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1210
168A
Wizards and Demonstration
implementation
,
math
900
x10429
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x553
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x192
167C
Wizards and Numbers
games
,
math
2300
x659
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2120
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2018
166E
Tetrahedron
dp
,
math
,
matrices
1500
x20436
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x349
166C
Median
greedy
,
math
,
sortings
1500
x6401
166B
Polygons
geometry
,
sortings
2100
x2374
166A
Rank List
binary search
,
implementation
,
sortings
1100
x17236
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6469
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1608
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12051
165B
Burning Midnight Oil
binary search
,
implementation
1500
x17141
165A
Supercentral Point
implementation
1000
x23087
164E
Polycarpus and Tasks
3100
x67
164D
Minimum Diameter
binary search
,
brute force
3100
x230
164C
Machine Programming
flows
,
graphs
2400
x888
164B
Ancient Berland Hieroglyphs
two pointers
2000
x451
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x989
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1555
163D
Large Refrigerator
brute force
2900
x487
163C
Conveyor
sortings
,
two pointers
2100
x538
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