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Codeforces Round 950 (Div. 3)
24:35:28
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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
#
Name
1003B
Binary String Constructing
constructive algorithms
1300
x11101
1002D2
Oracle for f(x) = b * x + (1 - b) * (1 - x) mod 2
1300
x373
1002B1
Distinguish zero state and W state
1300
x473
1002A2
Generate superposition of zero state and a basis state
1300
x552
1001F
Distinguish multi-qubit basis states
*special problem
1300
x533
996B
World Cup
binary search
,
math
1300
x8877
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8195
976B
Lara Croft and the New Game
implementation
,
math
1300
x5673
965B
Battleship
implementation
1300
x4488
964B
Messages
math
1300
x4307
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7597
962A
Equator
implementation
1300
x12557
957A
Tritonic Iridescence
implementation
1300
x5686
946C
String Transformation
greedy
,
strings
1300
x8781
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7817
929B
Места в самолёте
*special problem
,
implementation
1300
x2038
926A
2-3-numbers
implementation
,
math
1300
x3687
924A
Mystical Mosaic
greedy
,
implementation
1300
x4913
922B
Magic Forest
brute force
1300
x8327
922A
Cloning Toys
implementation
1300
x11346
919C
Seat Arrangements
brute force
,
implementation
1300
x8832
915B
Browser
implementation
1300
x7656
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x11493
909B
Segments
constructive algorithms
,
math
1300
x6215
907A
Masha and Bears
brute force
,
implementation
1300
x5565
900B
Position in Fraction
math
,
number theory
1300
x7653
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8301
897B
Chtholly's request
brute force
1300
x7092
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21881
887B
Cubes for Masha
brute force
,
implementation
1300
x5546
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5438
883F
Lost in Transliteration
implementation
1300
x2249
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x8813
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8975
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x16174
844B
Rectangles
combinatorics
,
math
1300
x7075
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6961
828B
Black Square
implementation
1300
x5652
821B
Okabe and Banana Trees
brute force
,
math
1300
x5650
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5089
814B
An express train to reveries
constructive algorithms
1300
x5563
810B
Summer sell-off
greedy
,
sortings
1300
x10997
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6757
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3528
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8283
796B
Find The Bone
implementation
1300
x8965
792B
Counting-out Rhyme
implementation
1300
x5926
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5575
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9358
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2737
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6813
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11757
750B
New Year and North Pole
geometry
,
implementation
1300
x9433
747C
Servers
implementation
1300
x4499
740A
Alyona and copybooks
brute force
,
implementation
1300
x8822
730H
Delete Them
constructive algorithms
,
implementation
1300
x2928
722A
Broken Clock
brute force
,
implementation
1300
x6596
716B
Complete the Word
greedy
,
two pointers
1300
x11849
707B
Bakery
graphs
1300
x12779
690F1
Tree of Life (easy)
1300
x2115
690C1
Brain Network (easy)
1300
x2693
681B
Economy Game
brute force
1300
x8782
673B
Problems for Round
greedy
,
implementation
1300
x3499
670C
Cinema
implementation
,
sortings
1300
x8946
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9349
661A
Lazy Caterer Sequence
*special problem
1300
x630
659B
Qualifying Contest
constructive algorithms
,
sortings
1300
x6184
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4901
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3092
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6558
630N
Forecast
math
1300
x4525
630F
Selection of Personnel
combinatorics
,
math
1300
x6604
628C
Bear and String Distance
greedy
,
strings
1300
x5707
628B
New Skateboard
dp
1300
x10374
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6535
625C
K-special Tables
constructive algorithms
,
implementation
1300
x6748
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x10810
617B
Chocolate
combinatorics
1300
x17424
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7057
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9818
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7087
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27779
598B
Queries on a String
implementation
,
strings
1300
x10634
588B
Duff in Love
math
1300
x13870
586B
Laurenty and Shop
implementation
1300
x5122
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5229
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16331
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6766
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15800
567B
Berland National Library
implementation
1300
x8349
558B
Amr and The Large Array
implementation
1300
x7765
545D
Queue
greedy
,
implementation
,
sortings
1300
x24212
526A
King of Thieves
brute force
,
implementation
1300
x4727
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19368
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7373
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9535
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22159
493A
Vasya and Football
implementation
1300
x6032
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x17018
485B
Valuable Resources
brute force
,
greedy
1300
x6460
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