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Before contest
Codeforces Round 941 (Div. 1)
16:32:23
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Before contest
Codeforces Round 941 (Div. 2)
16:32:23
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→ Filter Problems
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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
417B
Crash
implementation
1400
x1747
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8634
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20720
413C
Jeopardy!
greedy
,
math
1400
x2301
402B
Trees in a Row
brute force
,
implementation
1400
x3686
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19245
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11326
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2083
379C
New Year Ratings Change
greedy
,
sortings
1400
x6493
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6285
363C
Fixing Typos
greedy
,
implementation
1400
x13048
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7707
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7598
357B
Flag Day
constructive algorithms
,
implementation
1400
x8025
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9077
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2505
334B
Eight Point Sets
sortings
1400
x3541
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1335
316A2
Special Task
math
1400
x2097
315A
Sereja and Bottles
brute force
1400
x10689
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5515
295A
Greg and Array
data structures
,
implementation
1400
x15988
290D
Orange
*special problem
,
implementation
1400
x1782
290A
Mysterious strings
*special problem
,
implementation
1400
x2941
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x16719
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3102
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6364
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47514
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5466
277A
Learning Languages
dfs and similar
,
dsu
1400
x18070
272B
Dima and Sequence
implementation
,
math
1400
x3911
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4071
261A
Maxim and Discounts
greedy
,
sortings
1400
x5086
260A
Adding Digits
implementation
,
math
1400
x14077
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10297
248B
Chilly Willy
math
,
number theory
1400
x5187
245E
Mishap in Club
greedy
,
implementation
1400
x3219
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7294
228B
Two Tables
brute force
,
implementation
1400
x3430
226A
Flying Saucer Segments
math
1400
x3901
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5691
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5930
203C
Photographer
greedy
,
sortings
1400
x5567
198B
Jumping on Walls
shortest paths
1400
x4072
197B
Limit
math
1400
x4536
188F
Binary Notation
*special problem
,
implementation
1400
x286
188E
HQ9+
*special problem
,
implementation
1400
x489
188C
LCM
*special problem
,
implementation
,
math
1400
x434
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7800
180C
Letter
dp
1400
x7041
175B
Plane of Tanks: Pro
implementation
1400
x1358
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2334
174B
File List
dp
,
greedy
,
implementation
1400
x2188
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2915
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2453
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8866
152C
Pocket Book
combinatorics
1400
x10245
150A
Win or Freeze
games
,
math
,
number theory
1400
x7559
141B
Hopscotch
geometry
,
math
1400
x5120
131C
The World is a Theatre
combinatorics
,
math
1400
x10617
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x515
125A
Measuring Lengths in Baden
math
1400
x2634
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3744
120F
Spiders
dp
,
greedy
,
trees
1400
x3503
120E
Put Knight!
games
,
math
1400
x2639
120D
Three Sons
brute force
1400
x1892
111A
Petya and Inequiations
greedy
1400
x4617
108B
Datatypes
math
,
sortings
1400
x2407
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4913
100C
A+B
*special problem
,
implementation
1400
x514
81A
Plug-in
implementation
1400
x10150
79B
Colorful Field
implementation
,
sortings
1400
x6774
77A
Heroes
brute force
,
implementation
1400
x1741
60B
Serial Time!
dfs and similar
,
dsu
1400
x4432
45I
TCMCF+++
greedy
1400
x2300
44E
Anfisa the Monkey
dp
1400
x4799
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2742
41B
Martian Dollar
brute force
1400
x3848
38C
Blinds
brute force
1400
x2080
30A
Accounting
brute force
,
math
1400
x3305
26B
Regular Bracket Sequence
greedy
1400
x17399
24A
Ring road
graphs
1400
x4753
19A
World Football Cup
implementation
1400
x2577
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4064
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