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Codeforces Round 968 (Div. 2)
2 days
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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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Custom test
Problems
#
Name
479C
Exams
greedy
,
sortings
1400
x29316
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7848
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8393
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6346
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x673
448B
Suffix Structures
implementation
,
strings
1400
x15942
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12425
441B
Valera and Fruits
greedy
,
implementation
1400
x7036
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13733
436B
Om Nom and Spiders
implementation
,
math
1400
x3048
435B
Pasha Maximizes
greedy
1400
x6867
430B
Balls Game
brute force
,
two pointers
1400
x3682
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4646
417B
Crash
implementation
1400
x1766
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8806
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x21880
413C
Jeopardy!
greedy
,
math
1400
x2352
402B
Trees in a Row
brute force
,
implementation
1400
x3795
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19790
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11451
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2139
379C
New Year Ratings Change
greedy
,
sortings
1400
x6534
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6411
363C
Fixing Typos
greedy
,
implementation
1400
x13232
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7889
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7702
357B
Flag Day
constructive algorithms
,
implementation
1400
x8134
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9272
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2547
334B
Eight Point Sets
sortings
1400
x3570
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1356
316A2
Special Task
math
1400
x2126
315A
Sereja and Bottles
brute force
1400
x10991
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5594
295A
Greg and Array
data structures
,
implementation
1400
x17260
290D
Orange
*special problem
,
implementation
1400
x1792
290A
Mysterious strings
*special problem
,
implementation
1400
x2982
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x17118
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3147
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6529
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x51105
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5563
277A
Learning Languages
dfs and similar
,
dsu
1400
x18642
272B
Dima and Sequence
implementation
,
math
1400
x3994
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4114
261A
Maxim and Discounts
greedy
,
sortings
1400
x5141
260A
Adding Digits
implementation
,
math
1400
x14480
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10567
248B
Chilly Willy
math
,
number theory
1400
x5277
245E
Mishap in Club
greedy
,
implementation
1400
x3259
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7414
228B
Two Tables
brute force
,
implementation
1400
x3456
226A
Flying Saucer Segments
math
1400
x3957
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5785
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5997
203C
Photographer
greedy
,
sortings
1400
x5640
198B
Jumping on Walls
shortest paths
1400
x4214
197B
Limit
math
1400
x4617
188F
Binary Notation
*special problem
,
implementation
1400
x295
188E
HQ9+
*special problem
,
implementation
1400
x497
188C
LCM
*special problem
,
implementation
,
math
1400
x447
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7964
180C
Letter
dp
1400
x7256
175B
Plane of Tanks: Pro
implementation
1400
x1407
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2373
174B
File List
dp
,
greedy
,
implementation
1400
x2219
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2969
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2472
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9087
152C
Pocket Book
combinatorics
1400
x10500
150A
Win or Freeze
games
,
math
,
number theory
1400
x7710
141B
Hopscotch
geometry
,
math
1400
x5300
131C
The World is a Theatre
combinatorics
,
math
1400
x10983
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x526
125A
Measuring Lengths in Baden
math
1400
x2684
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3857
120F
Spiders
dp
,
greedy
,
trees
1400
x3557
120E
Put Knight!
games
,
math
1400
x2710
120D
Three Sons
brute force
1400
x1913
111A
Petya and Inequiations
greedy
1400
x4721
108B
Datatypes
math
,
sortings
1400
x2438
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5048
100C
A+B
*special problem
,
implementation
1400
x528
81A
Plug-in
implementation
1400
x10533
79B
Colorful Field
implementation
,
sortings
1400
x7056
77A
Heroes
brute force
,
implementation
1400
x1759
60B
Serial Time!
dfs and similar
,
dsu
1400
x4540
45I
TCMCF+++
greedy
1400
x2366
44E
Anfisa the Monkey
dp
1400
x5012
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2815
41B
Martian Dollar
brute force
1400
x3964
38C
Blinds
brute force
1400
x2140
30A
Accounting
brute force
,
math
1400
x3419
26B
Regular Bracket Sequence
greedy
1400
x18728
24A
Ring road
graphs
1400
x5004
19A
World Football Cup
implementation
1400
x2723
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4310
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