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Before contest
Codeforces Round 954 (Div. 3)
5 days
→ Filter Problems
Difficulty:
—
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
454B
Little Pony and Sort by Shift
implementation
1200
x17927
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x28546
439B
Devu, the Dumb Guy
implementation
,
sortings
1200
x14101
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x37009
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11540
431B
Shower Line
brute force
,
implementation
1200
x10558
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7386
413A
Data Recovery
implementation
1200
x2548
412C
Pattern
implementation
,
strings
1200
x3867
408B
Garland
implementation
1200
x8962
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4397
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7405
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11974
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9597
379B
New Year Present
constructive algorithms
,
implementation
1200
x7206
366B
Dima and To-do List
brute force
,
implementation
1200
x6753
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7921
353A
Domino
implementation
,
math
1200
x17999
350A
TL
brute force
,
greedy
,
implementation
1200
x16072
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8727
342A
Xenia and Divisors
greedy
,
implementation
1200
x12220
340A
The Wall
math
1200
x7466
327B
Hungry Sequence
math
1200
x19165
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x40470
315B
Sereja and Array
implementation
1200
x6890
304A
Pythagorean Theorem II
brute force
,
math
1200
x10231
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7861
298B
Sail
brute force
,
greedy
,
implementation
1200
x13682
292B
Network Topology
graphs
,
implementation
1200
x7770
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x22676
285B
Find Marble
implementation
1200
x14815
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10647
262B
Roma and Changing Signs
greedy
1200
x11014
255B
Code Parsing
implementation
1200
x4891
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x6890
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x18307
234A
Lefthanders and Righthanders
implementation
1200
x4386
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10457
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20582
216A
Tiling with Hexagons
implementation
,
math
1200
x4936
208D
Prizes, Prizes, more Prizes
implementation
1200
x7504
203A
Two Problems
brute force
,
implementation
1200
x4119
194B
Square
math
1200
x3447
186B
Growing Mushrooms
greedy
,
sortings
1200
x5362
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2469
177D1
Encrypting Messages
brute force
1200
x2082
177B2
Rectangular Game
number theory
1200
x2846
176A
Trading Business
greedy
,
sortings
1200
x1422
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2694
171A
Mysterious numbers - 1
*special problem
,
constructive algorithms
1200
x4379
151B
Phone Numbers
implementation
,
strings
1200
x6250
145A
Lucky Conversion
greedy
,
implementation
1200
x6980
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4932
134A
Average Numbers
brute force
,
implementation
1200
x3821
133B
Unary
implementation
1200
x8683
131B
Opposites Attract
implementation
,
math
1200
x6892
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11795
112B
Petya and Square
implementation
,
math
1200
x4086
102A
Clothes
brute force
1200
x2938
101A
Homework
greedy
1200
x3722
88A
Chord
brute force
,
implementation
1200
x3756
80B
Depression
geometry
,
math
1200
x4241
79A
Bus Game
greedy
1200
x3988
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x12867
72C
Extraordinarily Nice Numbers
*special problem
,
math
1200
x907
69B
Bets
greedy
,
implementation
1200
x3206
63B
Settlers' Training
implementation
1200
x4732
59B
Fortune Telling
implementation
,
number theory
1200
x6733
55A
Flea travel
implementation
,
math
1200
x3347
53C
Little Frog
constructive algorithms
1200
x6252
48B
Land Lot
brute force
,
implementation
1200
x2626
47B
Coins
implementation
1200
x13217
38B
Chess
brute force
,
implementation
,
math
1200
x3431
33A
What is for dinner?
greedy
,
implementation
1200
x3902
31A
Worms Evolution
implementation
1200
x10014
27A
Next Test
implementation
,
sortings
1200
x19523
23A
You're Given a String...
brute force
,
greedy
1200
x5115
18C
Stripe
data structures
,
implementation
1200
x12593
15A
Cottage Village
implementation
,
sortings
1200
x3639
9C
Hexadecimal's Numbers
brute force
,
implementation
,
math
1200
x12604
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5363
8A
Train and Peter
strings
1200
x5678
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13268
5B
Center Alignment
implementation
,
strings
1200
x5710
4B
Before an Exam
constructive algorithms
,
greedy
1200
x23972
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