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Codeforces Round 950 (Div. 3)
40:21:13
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Difficulty:
—
brute force
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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#
Name
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x1167
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x75
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2048
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7739
1491B
Minimal Cost
brute force
,
math
1200
x13603
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18054
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31651
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25680
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x401
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4392
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x17159
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13753
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2809
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x9613
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x21039
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9115
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4408
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11346
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19061
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x971
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x18066
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x25749
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x19539
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5113
1475B
New Year's Number
brute force
,
dp
,
math
900
x46803
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12255
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x30151
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x2950
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19148
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1310
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1860
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9184
1468K
The Robot
brute force
,
implementation
1600
x4976
1467B
Hills And Valleys
brute force
,
implementation
1700
x10742
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x7044
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22307
1462C
Unique Number
brute force
,
greedy
,
math
900
x31476
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x2064
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x8939
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12393
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1438
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4092
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1489
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14919
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x133
1444A
Division
brute force
,
math
,
number theory
1500
x12630
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1227
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1294
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17837
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4150
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x65
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20509
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19803
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7252
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x681
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4056
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14872
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x15983
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x5208
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10686
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x12016
1415A
Prison Break
brute force
,
math
800
x14935
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5554
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x2433
1411B
Fair Numbers
brute force
,
number theory
1000
x17995
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x22814
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28343
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4175
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16713
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22115
1400G
Mercenaries
bitmasks
,
brute force
,
combinatorics
,
dp
,
dsu
,
math
,
two pointers
2600
x907
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x790
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9842
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16817
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x10849
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27898
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14390
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10948
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13577
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x23520
1394B
Boboniu Walks on Graph
brute force
,
dfs and similar
,
graphs
,
hashing
2300
x1793
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4951
1391B
Fix You
brute force
,
greedy
,
implementation
800
x26181
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4038
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18446
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x15907
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24577
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18461
1384B1
Koa and the Beach (Easy Version)
brute force
,
dp
,
greedy
1900
x3855
1383D
Rearrange
brute force
,
constructive algorithms
,
graphs
,
greedy
,
sortings
2800
x642
1382A
Common Subsequence
brute force
800
x26105
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19994
1380A
Three Indices
brute force
,
data structures
900
x23736
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1061
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5436
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12502
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11621
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1674
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x8767
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1267
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