so I'm trying to copy over vectors of different lengths between MPI processes in C++, namely taking vectors on all of the nodes and concatenating them into a new vector on node 0. so I'm trying to copy over vectors of different
so I'm trying to copy over vectors of different lengths between MPI processes in C++, namely taking vectors on all of the nodes and concatenating them into a new vector on node 0. so I'm trying to copy over vectors of different