Given the following snippet of code from a user defined function.

int row $=12$; int col $=31$;

int $**$ arr $=$ malloc$($sizeof$($int $*)*$ row$)$;

for$($int r $=0$; r $<$ row; $++$r$)$

arr$[$r$]=$ malloc$($sizeof$($int$)*$ row$)$;

$//$more code that does other stuff

The above code is attempting to allocate space for a $2$D dynamic array that has $12$ rows and $31$ columns. Does the code properly allocate enough space for the $2$D dynamic array? If the code does allocate enough space for the $2$D dynamic array, type in the numerical value $0$ as the answer below. Otherwise type in how many elements are potentially missing.