modified:   laplace/openacc/c/laplace2d_acc_ver_cudacast.c
	new file:   laplace/serial/dynamic_2d_array.h
	modified:   laplace/serial/laplace_solver_serial.c
	new file:   matmul/serial/c/dynamic_2d_array.c
	new file:   matmul/serial/c/matmul_dynamic2d_answer.c