MATLAB: How to group an array and then replace each group with different numbers

Question

Example of array: A = [1 1 1 0 0 0 1 0 0 1 0 1 1 0 0 ];

Wanted array: B = [1 1 1 4 4 4 1 5 5 1 6 1 1 3 3];

Is is possible to separate each group of zeros in A and then replace each group with a number in another array?

First group of zeros is the first three zeros in A, g1=[0, 0, 0];

Second group: g2=[0, 0];

and so on.

Then i want to replace each group with C = [4, 5, 6, 3];

The result will be g1 = [4, 4, 4], g2 = [5, 5] and so on.

Answer 1

B = A;
B(A==0) = repelem(C,diff(reshape(find(diff([1,A,1]) ~= 0),2,[])));