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Codeforces Round 940 (Div. 2)
3 days
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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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Status
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Custom test
Problems
#
Name
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10430
902A
Visiting a Friend
greedy
,
implementation
1100
x9670
901E
Cyclic Cipher
fft
,
math
3300
x83
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x426
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1128
901B
GCD of Polynomials
constructive algorithms
,
math
2200
x1372
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5002
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1023
900D
Unusual Sequences
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2000
x2961
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4403
900B
Position in Fraction
math
,
number theory
1300
x7614
900A
Find Extra One
geometry
,
implementation
800
x13333
899F
Letters Removing
data structures
,
strings
2100
x1570
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2722
899D
Shovel Sale
constructive algorithms
,
math
1800
x2671
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8251
899B
Months and Years
implementation
1200
x5745
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10065
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1120
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4478
898D
Alarm Clock
greedy
1600
x3600
898C
Phone Numbers
implementation
,
strings
1400
x5119
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9230
898A
Rounding
implementation
,
math
800
x15572
897B
Chtholly's request
brute force
1300
x7071
897A
Scarborough Fair
implementation
800
x13901
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x1955
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x515
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3113
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2044
896A
Nephren gives a riddle
binary search
,
dfs and similar
1700
x3334
895E
Eyes Closed
data structures
,
probabilities
2300
x906
895D
String Mark
combinatorics
,
math
,
strings
2100
x1084
895C
Square Subsets
bitmasks
,
combinatorics
,
dp
,
math
2000
x5087
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3410
895A
Pizza Separation
brute force
,
implementation
1200
x6426
894E
Ralph and Mushrooms
dp
,
graphs
2100
x2131
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1100
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4273
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4364
894A
QAQ
brute force
,
dp
800
x32693
893F
Subtree Minimum Query
data structures
,
trees
2300
x1644
893E
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
2000
x3232
893D
Credit Card
data structures
,
dp
,
greedy
,
implementation
1900
x2902
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21443
893B
Beautiful Divisors
brute force
,
implementation
1000
x10906
893A
Chess For Three
implementation
900
x9992
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8645
892A
Greed
greedy
,
implementation
900
x13181
891E
Lust
combinatorics
,
math
,
matrices
3000
x837
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x168
891C
Envy
data structures
,
dsu
,
graphs
2300
x2205
891B
Gluttony
constructive algorithms
,
greedy
2000
x2893
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9554
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x511
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x3851
888F
Connecting Vertices
dp
,
graphs
2500
x739
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x6549
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7563
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8044
888B
Buggy Robot
greedy
1000
x9503
888A
Local Extrema
brute force
,
implementation
800
x10645
887F
Row of Models
greedy
,
sortings
2500
x159
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x161
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x470
887C
Solution for Cube
brute force
,
implementation
1500
x2830
887B
Cubes for Masha
brute force
,
implementation
1300
x5524
887A
Div. 64
implementation
1000
x10918
886F
Symmetric Projections
geometry
2900
x262
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x971
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1718
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5421
886B
Vlad and Cafes
1000
x7761
886A
ACM ICPC
brute force
1000
x10062
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x923
884E
Binary Matrix
dsu
2500
x663
884D
Boxes And Balls
data structures
,
greedy
2300
x1863
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4603
884B
Japanese Crosswords Strike Back
implementation
1100
x6779
884A
Book Reading
implementation
800
x10318
883M
Quadcopter Competition
greedy
,
math
1100
x3483
883L
Berland.Taxi
data structures
2500
x226
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1069
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x553
883I
Photo Processing
binary search
,
dp
1900
x1887
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1551
883G
Orientation of Edges
dfs and similar
,
graphs
1900
x1381
883F
Lost in Transliteration
implementation
1300
x2231
883E
Field of Wonders
implementation
,
strings
1500
x1874
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x348
883C
Downloading B++
binary search
,
implementation
2300
x614
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x321
883A
Automatic Door
implementation
2200
x572
879B
Table Tennis
data structures
,
implementation
1200
x11815
879A
Borya's Diagnosis
implementation
900
x8944
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x470
878D
Magic Breeding
bitmasks
2900
x638
878C
Tournament
data structures
,
graphs
2700
x881
878B
Teams Formation
data structures
,
implementation
2300
x1026
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5253
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