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Codeforces Round 987 (Div. 2)
31:49:28
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Difficulty:
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greedy
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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Problems
#
Name
1077E
Thematic Contests
greedy
,
sortings
1800
x4728
1077B
Disturbed People
greedy
1000
x19080
1076F
Summer Practice Report
dp
,
greedy
2500
x645
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x5258
1076A
Minimizing the String
greedy
,
strings
1200
x13152
1073F
Choosing Two Paths
dfs and similar
,
dp
,
greedy
,
trees
2500
x546
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6432
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x843
1070F
Debate
greedy
1500
x3656
1070D
Garbage Disposal
greedy
1300
x4922
1070C
Cloud Computing
data structures
,
greedy
2000
x2061
1070B
Berkomnadzor
data structures
,
greedy
2400
x652
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x406
1066B
Heaters
greedy
,
two pointers
1500
x8371
1065C
Make It Equal
greedy
1600
x7852
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1799
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5466
1062B
Math
greedy
,
math
,
number theory
1500
x8849
1062A
A Prank
greedy
,
implementation
1300
x8828
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2375
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7315
1061A
Coins
greedy
,
implementation
,
math
800
x22067
1060D
Social Circles
greedy
,
math
1900
x3640
1060B
Maximum Sum of Digits
greedy
1100
x8981
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1447
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5933
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2382
1055D
Refactoring
greedy
,
implementation
,
strings
2400
x628
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x295
1054D
Changing Array
greedy
,
implementation
1900
x2254
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x398
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9302
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x17224
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8426
1046C
Space Formula
greedy
1400
x3119
1043E
Train Hard, Win Easy
constructive algorithms
,
greedy
,
math
,
sortings
1900
x2777
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6900
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1315
1042C
Array Product
constructive algorithms
,
greedy
,
math
1700
x4729
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3601
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9522
1041A
Heist
greedy
,
implementation
,
sortings
800
x25218
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7110
1040A
Palindrome Dance
greedy
1000
x9581
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x788
1038D
Slime
dp
,
greedy
,
implementation
1800
x8412
1038C
Gambling
greedy
,
sortings
1300
x9440
1037C
Equalize
dp
,
greedy
,
strings
1300
x18927
1037B
Reach Median
greedy
1300
x10415
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x11218
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x9323
1031D
Minimum path
greedy
1900
x2814
1031C
Cram Time
greedy
1600
x5328
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x2943
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7586
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x17032
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1745
1027C
Minimum Value Rectangle
greedy
1600
x6912
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7918
1023C
Bracket Subsequence
greedy
1200
x9981
1019A
Elections
brute force
,
greedy
1700
x4649
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6025
1016A
Death Note
greedy
,
implementation
,
math
900
x14942
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3627
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5869
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x8244
1013B
And
greedy
1200
x7681
1011A
Stages
greedy
,
implementation
,
sortings
900
x12259
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x835
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6264
1009C
Annoying Present
greedy
,
math
1700
x5309
1009B
Minimum Ternary String
greedy
,
implementation
1400
x10159
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11463
1006B
Polycarp's Practice
greedy
,
implementation
,
sortings
1200
x13337
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x10219
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11733
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1074
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9512
1003D
Coins and Queries
greedy
1600
x7806
1000B
Light It Up
greedy
1500
x5879
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8823
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6713
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4388
998B
Cutting
dp
,
greedy
,
sortings
1200
x13159
997B
Roman Digits
brute force
,
combinatorics
,
dp
,
greedy
,
math
2000
x2977
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8332
996A
Hit the Lottery
dp
,
greedy
800
x92336
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1904
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7109
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5736
993D
Compute Power
binary search
,
dp
,
greedy
2500
x754
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x310
991D
Bishwock
dp
,
greedy
1500
x7195
991B
Getting an A
greedy
,
sortings
900
x12660
990F
Flow Control
dfs and similar
,
dp
,
greedy
,
trees
2400
x908
990E
Post Lamps
brute force
,
greedy
2100
x2027
990B
Micro-World
greedy
,
sortings
1200
x8137
988E
Divisibility by 25
brute force
,
greedy
2100
x3981
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x7009
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3678
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