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Codeforces Round 986 (Div. 2)
08:17:06
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Difficulty:
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constructive algorithms
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
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7334
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16709
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1704
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3946
1333A
Little Artem
constructive algorithms
1000
x24653
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3865
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8198
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17660
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x401
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1715
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9176
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x13265
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13452
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x30486
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1997
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x12166
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x13756
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x40442
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4242
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9868
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3397
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x7302
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11293
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6708
1312B
Bogosort
constructive algorithms
,
sortings
1000
x27209
1311E
Construct the Binary Tree
brute force
,
constructive algorithms
,
trees
2200
x2379
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3131
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x5035
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11791
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x14137
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6348
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17938
1302B
DAG
constructive algorithms
x145
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x4020
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2916
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7529
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x368
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6400
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x834
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5493
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x523
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x245
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x661
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1452
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4743
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1848
1283F
DIY Garland
constructive algorithms
,
greedy
,
trees
2200
x1871
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x13189
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x1147
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2247
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x66
1278E
Tests for problem D
constructive algorithms
,
dfs and similar
,
divide and conquer
,
trees
2200
x1925
1276E
Four Stones
constructive algorithms
3500
x90
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1674
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13946
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x241
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2292
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x2389
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4697
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x14152
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x16440
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8672
1267L
Lexicography
constructive algorithms
,
strings
1800
x3105
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x912
1267H
Help BerLine
constructive algorithms
3200
x152
1267D
DevOps Best Practices
constructive algorithms
2800
x232
1267C
Cactus Revenge
constructive algorithms
3500
x384
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
x9722
1266B
Dice Tower
constructive algorithms
,
math
1000
x15124
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x15148
1264F
Beautiful Fibonacci Problem
constructive algorithms
,
number theory
3500
x946
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x816
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5827
1256F
Equalizing Two Strings
constructive algorithms
,
sortings
,
strings
2000
x3333
1255C
League of Leesins
constructive algorithms
,
implementation
1600
x6724
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1432
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3190
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4683
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x5229
1253D
Harmonious Graph
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
1700
x9306
1250M
SmartGarden
constructive algorithms
,
divide and conquer
2500
x361
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2617
1245B
Restricted RPS
constructive algorithms
,
dp
,
greedy
1200
x13875
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x1362
1244F
Chips
constructive algorithms
,
implementation
2300
x1544
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5232
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7612
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x130
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12663
1237H
Balanced Reversals
constructive algorithms
3300
x373
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4350
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x6107
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x10172
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x840
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x438
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5224
1227G
Not Same
constructive algorithms
2600
x1038
1227C
Messy
constructive algorithms
1700
x5532
1227B
Box
constructive algorithms
1200
x9692
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