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Before contest
Codeforces Round 972 (Div. 2)
41:45:47
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
493B
Vasya and Wrestling
implementation
1400
x13231
492C
Vanya and Exams
greedy
,
sortings
1400
x13995
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x45915
485A
Factory
implementation
,
math
,
matrices
1400
x8242
479C
Exams
greedy
,
sortings
1400
x29447
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7864
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8429
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6353
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x676
448B
Suffix Structures
implementation
,
strings
1400
x15992
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12501
441B
Valera and Fruits
greedy
,
implementation
1400
x7053
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13876
436B
Om Nom and Spiders
implementation
,
math
1400
x3048
435B
Pasha Maximizes
greedy
1400
x6911
430B
Balls Game
brute force
,
two pointers
1400
x3691
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4654
417B
Crash
implementation
1400
x1766
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8856
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x22045
413C
Jeopardy!
greedy
,
math
1400
x2366
402B
Trees in a Row
brute force
,
implementation
1400
x3798
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19872
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11465
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2152
379C
New Year Ratings Change
greedy
,
sortings
1400
x6538
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6445
363C
Fixing Typos
greedy
,
implementation
1400
x13279
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7930
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7719
357B
Flag Day
constructive algorithms
,
implementation
1400
x8153
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9306
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2553
334B
Eight Point Sets
sortings
1400
x3574
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1357
316A2
Special Task
math
1400
x2128
315A
Sereja and Bottles
brute force
1400
x11062
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5605
295A
Greg and Array
data structures
,
implementation
1400
x17480
290D
Orange
*special problem
,
implementation
1400
x1795
290A
Mysterious strings
*special problem
,
implementation
1400
x2988
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x17196
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3153
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6544
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x51778
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5578
277A
Learning Languages
dfs and similar
,
dsu
1400
x18751
272B
Dima and Sequence
implementation
,
math
1400
x4006
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4120
261A
Maxim and Discounts
greedy
,
sortings
1400
x5152
260A
Adding Digits
implementation
,
math
1400
x14561
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10615
248B
Chilly Willy
math
,
number theory
1400
x5295
245E
Mishap in Club
greedy
,
implementation
1400
x3268
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7442
228B
Two Tables
brute force
,
implementation
1400
x3459
226A
Flying Saucer Segments
math
1400
x3974
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5794
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x6010
203C
Photographer
greedy
,
sortings
1400
x5653
198B
Jumping on Walls
shortest paths
1400
x4241
197B
Limit
math
1400
x4625
188F
Binary Notation
*special problem
,
implementation
1400
x296
188E
HQ9+
*special problem
,
implementation
1400
x497
188C
LCM
*special problem
,
implementation
,
math
1400
x450
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8009
180C
Letter
dp
1400
x7300
175B
Plane of Tanks: Pro
implementation
1400
x1409
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2373
174B
File List
dp
,
greedy
,
implementation
1400
x2226
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2974
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2479
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9131
152C
Pocket Book
combinatorics
1400
x10525
150A
Win or Freeze
games
,
math
,
number theory
1400
x7741
141B
Hopscotch
geometry
,
math
1400
x5315
131C
The World is a Theatre
combinatorics
,
math
1400
x11036
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x527
125A
Measuring Lengths in Baden
math
1400
x2703
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3877
120F
Spiders
dp
,
greedy
,
trees
1400
x3566
120E
Put Knight!
games
,
math
1400
x2716
120D
Three Sons
brute force
1400
x1916
111A
Petya and Inequiations
greedy
1400
x4737
108B
Datatypes
math
,
sortings
1400
x2450
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5065
100C
A+B
*special problem
,
implementation
1400
x530
81A
Plug-in
implementation
1400
x10621
79B
Colorful Field
implementation
,
sortings
1400
x7114
77A
Heroes
brute force
,
implementation
1400
x1769
60B
Serial Time!
dfs and similar
,
dsu
1400
x4552
45I
TCMCF+++
greedy
1400
x2377
44E
Anfisa the Monkey
dp
1400
x5043
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2823
41B
Martian Dollar
brute force
1400
x3984
38C
Blinds
brute force
1400
x2153
30A
Accounting
brute force
,
math
1400
x3440
26B
Regular Bracket Sequence
greedy
1400
x18933
24A
Ring road
graphs
1400
x5038
19A
World Football Cup
implementation
1400
x2731
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