在已分配的向量fortran中插入值更改形状

I would like to ask you about a problem that I have frequently in the management of CSR/CSC* matrices using Fortran. Suppose we have a vector V with N real values. The vector has been allocated previously with a certain size. Now we have to add a value in the middle of it at the index P. A brute force code would be:I would like to ask you about a problem that I