MEMORY m
and
TIME t
The default time limit is usually something large enough that one need not worry about it (e.g one day ). The default memory requested varies with machine and can be found printed at the beginning of the output. Note that the quantity specified as the 'memory' is the amount of internal workspace used by the program - the amount of memory needed to actually run the program is greater than this by the size of the program, plus i/o buffers etc.
If the MEMORY is used it must be the first line of the dataset.