Arrays in C

Question

Hey, I've been learning to program in C, I've been doing some exercises on arrays and there is one that is getting difficult for me, the exercise says:
Make a program that given an array A of N elements, which are integers in increasing order, obtain an array B such that its elements are the number of repetitions of the first array.
And the input and output would be something like this:

Input: A[1, 4, 4, 4, 5, 5, 7]
Output: B[1, 3, 2, 1]

I would appreciate your valuable help, because this problem is giving me headaches haha. I have tried, but the output appears correct only for the first element of array A

Answer 1

Can you show us what you've tried so far, so we can find out why it doesn't work?

Anyway, a possible solution (if you think it can help you out) is:

/*
setup code
*/

for(i=0; i<n; ++i) // for every A
{
++B[j]; // increment B
if(A[i] != A[i+1]) ++j; // but when A changes, go to the next B
}