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Codeforces Round 987 (Div. 2)
19:50:35
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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
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11553
1281B
Azamon Web Services
greedy
1600
x8327
1280D
Miss Punyverse
dp
,
greedy
,
trees
2500
x1017
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2720
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x8091
1278B
A and B
greedy
,
math
1500
x13379
1277B
Make Them Odd
greedy
,
number theory
1200
x15294
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1674
1276A
As Simple as One and Two
dp
,
greedy
1400
x12359
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13946
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20762
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x3099
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10619
1271B
Blocks
greedy
,
math
1300
x11408
1271A
Suits
brute force
,
greedy
,
math
800
x14996
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x16446
1270A
Card Game
games
,
greedy
,
math
800
x17002
1268B
Domino for Young
dp
,
greedy
,
math
2000
x5994
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8672
1267J
Just Arrange the Icons
greedy
,
implementation
,
math
1800
x2863
1267E
Elections
greedy
1700
x3296
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2253
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3649
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9723
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x15153
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5828
1264A
Beautiful Regional Contest
greedy
,
implementation
1500
x10118
1263B
PIN Codes
greedy
,
implementation
1400
x11400
1260E
Tournament
brute force
,
dp
,
greedy
2400
x1732
1260D
A Game with Traps
binary search
,
dp
,
greedy
,
sortings
1900
x3870
1260C
Infinite Fence
greedy
,
math
,
number theory
1700
x8268
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x618
1257E
The Contest
data structures
,
dp
,
greedy
2000
x4262
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7611
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x16052
1257A
Two Rival Students
greedy
,
math
800
x20638
1256E
Yet Another Division Into Teams
dp
,
greedy
,
sortings
2000
x4169
1256D
Binary String Minimizing
greedy
1500
x12141
1256C
Platforms Jumping
greedy
1700
x6932
1256B
Minimize the Permutation
greedy
1400
x13134
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3191
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4684
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x5229
1253E
Antenna Coverage
data structures
,
dp
,
greedy
,
sortings
2200
x2853
1253D
Harmonious Graph
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
1700
x9308
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x14355
1253B
Silly Mistake
greedy
,
implementation
1400
x11221
1252H
Twin Buildings
greedy
,
implementation
1800
x2688
1252E
Songwriter
greedy
,
two pointers
2200
x1247
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2682
1251E1
Voting (Easy Version)
data structures
,
dp
,
greedy
2300
x2362
1251D
Salary Changing
binary search
,
greedy
,
sortings
1900
x6029
1251C
Minimize The Integer
greedy
,
two pointers
1600
x12516
1251B
Binary Palindromes
greedy
,
strings
1400
x11027
1250N
Wires
dfs and similar
,
graphs
,
greedy
2000
x1590
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4124
1250J
The Parade
binary search
,
greedy
1800
x2968
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x135
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x723
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2618
1249D2
Too Many Segments (hard version)
data structures
,
greedy
,
sortings
1800
x5307
1249D1
Too Many Segments (easy version)
greedy
1800
x5139
1249C2
Good Numbers (hard version)
binary search
,
greedy
,
math
,
meet-in-the-middle
1500
x12700
1249C1
Good Numbers (easy version)
brute force
,
greedy
,
implementation
1300
x15618
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2401
1248B
Grow The Tree
greedy
,
math
,
sortings
900
x16943
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x7675
1245B
Restricted RPS
constructive algorithms
,
dp
,
greedy
1200
x13878
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x1363
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5241
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1555
1238G
Adilbek and the Watering System
data structures
,
greedy
,
sortings
2700
x410
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7445
1238B
Kill `Em All
greedy
,
sortings
1300
x13684
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x123
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4356
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x6113
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1675
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x10174
1236A
Stones
brute force
,
greedy
,
math
800
x16475
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x841
1231C
Increasing Matrix
greedy
1100
x3869
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18773
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4409
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6450
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x560
1225F
Tree Factory
constructive algorithms
,
greedy
,
trees
2500
x886
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x4074
1223C
Save the Nature
binary search
,
greedy
1600
x8376
1221B
Knights
constructive algorithms
,
greedy
1100
x11984
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16975
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2789
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x10291
1218I
The Light Square
2-sat
,
dfs and similar
,
greedy
2100
x609
1218F
Workout plan
data structures
,
greedy
1500
x2968
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1895
1217B
Zmei Gorynich
greedy
,
math
1600
x11293
1216F
Wi-Fi
data structures
,
dp
,
greedy
2100
x2700
1216B
Shooting
greedy
,
implementation
,
sortings
900
x18512
1215D
Ticket Game
games
,
greedy
,
math
1700
x6202
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