Computers and Technology, 19.03.2021 18:30 leeahnnfoster
You are given an array of arrays a. Your task is to group the arrays a[i] by their mean values, so that arrays with equal mean values are in the same group, and arrays with different mean values are in different groups. Each group should contain a set of indices (i, j, etc), such that the corresponding arrays (a[i], a[j], etc) all have the same mean. Return the set of groups as an array of arrays, where the indices within each group are sorted in ascending order, and the groups are sorted in ascending order of their minimum element.
Example
For
a = [[3, 3, 4, 2],
[4, 4],
[4, 0, 3, 3],
[2, 3],
[3, 3, 3]]
the output should be
meanGroups(a) = [[0, 4],
[1],
[2, 3]]
mean(a[0]) = (3 + 3 + 4 + 2) / 4 = 3;
mean(a[1]) = (4 + 4) / 2 = 4;
mean(a[2]) = (4 + 0 + 3 + 3) / 4 = 2.5;
mean(a[3]) = (2 + 3) / 2 = 2.5;
mean(a[4]) = (3 + 3 + 3) / 3 = 3.
There are three groups of means: those with mean 2.5, 3, and 4. And they form the following groups:
Arrays with indices 0and 4 form a group with mean 3;
Array with index 1 forms a group with mean 4;
Arrays with indices 2and 3 form a group with mean 2.5.
Note that neither
meanGroups(a) = [[0, 4],
[2, 3],
[1]]
nor
meanGroups(a) = [[0, 4],
[1],
[3, 2]]
will be considered as a correct
In the first case, the minimal element in the array at index 2 is 1, and it is less then the minimal element in the array at index 1, which is 2.
In the second case, the array at index 2 is not sorted in ascending order.
For
a = [[-5, 2, 3],
[0, 0],
[0],
[-100, 100]]
the output should be
meanGroups(a) = [[0, 1, 2, 3]]
The mean values of all of the arrays are 0, so all of them are in the same group.
Input/Output
Answers: 1
Computers and Technology, 22.06.2019 01:30
Imagine that you have a friend who is starting a small business and is interested in using social media to spread the word. he is not certain that it is a good move, and has come to you for . would you advise him to use social media to advertise his business? why or why not? support you answer with information from the text.
Answers: 1
Computers and Technology, 22.06.2019 19:30
When creating a presentation in libre office impress, where does the editing of slides take place? a. the slides panel b. the center panel c. the tasks panel, under the masters pages tab d. the tasks panel, under the layouts tab
Answers: 3
Computers and Technology, 23.06.2019 15:00
Idon’t understand the double8 coding problem. it is java
Answers: 1
Computers and Technology, 23.06.2019 18:40
How does is make you feel when you're kind to others? what are some opportunities in your life to be more kind to your friends and loved ones? imagine a world where kindness has be outlawed. how would people act differently? would your day-to-day life change significantly? why or why not?
Answers: 2
You are given an array of arrays a. Your task is to group the arrays a[i] by their mean values, so t...
Chemistry, 06.10.2020 01:01
Mathematics, 06.10.2020 01:01
Physics, 06.10.2020 01:01
Chemistry, 06.10.2020 01:01
Mathematics, 06.10.2020 01:01
World Languages, 06.10.2020 01:01
Mathematics, 06.10.2020 01:01
English, 06.10.2020 01:01
Mathematics, 06.10.2020 01:01
Mathematics, 06.10.2020 01:01