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Before contest
Codeforces Round 941 (Div. 1)
35:22:58
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Before contest
Codeforces Round 941 (Div. 2)
35:22:58
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brute force
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
#
Name
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2914
30A
Accounting
brute force
,
math
1400
x3304
228B
Two Tables
brute force
,
implementation
1400
x3430
665B
Shopping
brute force
1400
x3475
513B1
Permutations
brute force
1400
x3575
430B
Balls Game
brute force
,
two pointers
1400
x3623
402B
Trees in a Row
brute force
,
implementation
1400
x3686
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3742
41B
Martian Dollar
brute force
1400
x3846
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3885
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5184
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5215
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5464
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5662
1162B
Double Matrix
brute force
,
greedy
1400
x5759
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5930
934A
A Compatible Pair
brute force
,
games
1400
x6699
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6784
911C
Three Garlands
brute force
,
constructive algorithms
1400
x6951
538A
Cutting Banner
brute force
,
implementation
1400
x7046
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7280
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7294
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7540
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7596
962C
Make a Square
brute force
,
implementation
,
math
1400
x7742
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7794
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8219
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8263
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8302
710B
Optimal Point on a Line
brute force
,
sortings
1400
x8515
1214A
Optimal Currency Exchange
brute force
,
math
1400
x8693
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10030
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10451
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x10541
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10631
315A
Sereja and Bottles
brute force
1400
x10686
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x10951
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11049
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11171
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x11998
1759D
Make It Round
brute force
,
number theory
1400
x12001
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12091
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12169
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12348
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x12637
1705C
Mark and His Unfinished Essay
brute force
,
implementation
1400
x12955
987C
Three displays
brute force
,
dp
,
implementation
1400
x13063
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13066
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13169
1676H1
Maximum Crossings (Easy Version)
brute force
1400
x13213
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13314
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13401
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x13918
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14177
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15054
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15177
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x15885
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x15915
1548A
Web of Lies
brute force
,
graphs
,
greedy
1400
x15994
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x16282
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x16717
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17009
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17032
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19380
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19850
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20127
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21888
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47489
171D
Broken checker
*special problem
,
brute force
1300
x2507
203B
Game on Paper
brute force
,
implementation
1300
x2541
181B
Number of Triplets
binary search
,
brute force
1300
x2870
304B
Calendar
brute force
,
implementation
1300
x2917
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3526
189B
Counting Rhombi
brute force
,
math
1300
x3867
146B
Lucky Mask
brute force
,
implementation
1300
x4219
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4673
526A
King of Thieves
brute force
,
implementation
1300
x4724
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4867
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5126
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5181
887B
Cubes for Masha
brute force
,
implementation
1300
x5527
907A
Masha and Bears
brute force
,
implementation
1300
x5552
821B
Okabe and Banana Trees
brute force
,
math
1300
x5623
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6169
485B
Valuable Resources
brute force
,
greedy
1300
x6442
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6531
722A
Broken Clock
brute force
,
implementation
1300
x6570
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6799
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7005
897B
Chtholly's request
brute force
1300
x7074
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7357
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8258
922B
Magic Forest
brute force
1300
x8279
416B
Art Union
brute force
,
dp
,
implementation
1300
x8460
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8585
681B
Economy Game
brute force
1300
x8748
740A
Alyona and copybooks
brute force
,
implementation
1300
x8806
919C
Seat Arrangements
brute force
,
implementation
1300
x8810
1016B
Segment Occurrences
brute force
,
implementation
1300
x9222
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9758
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