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Table 3:
Nodes used.
Function nodes 
  / Protected divide returns −1 if denominator is 0, otherwise, the result of dividing the first operand by the second 
   Returns 1 if the first operand is greater than the second or −1 otherwise 
  IGTZ Evaluates the first operand. If it evaluates as greater than zero the result of evaluating the second operand is returned otherwise the result of evaluating the third operand is returned 
   Returns 1 if the first operand is less than the second or −1 otherwise 
  X Returns the product of two operands 
Terminal nodes 
  B1 Packs the single largest item into the current bin returning 1 if successful or −1 otherwise 
  B2 Packs the largest combination of exactly two items into the current bin returning 1 if successful or −1 otherwise 
  B2A Packs the largest combination of up to two items into the current bin giving preference to sets of lower cardinality. Returns 1 if successful or −1 otherwise 
  B3A As for B2A but considers sets of up to three items 
  B5A As for B2A but considers sets of up to five items 
  C Returns the bin capacity 
  FS Returns the free space in the current bin 
  INT Returns a random integer value  
  W1 Packs the smallest item into the current bin returning 1 if successful, else −1 
Function nodes 
  / Protected divide returns −1 if denominator is 0, otherwise, the result of dividing the first operand by the second 
   Returns 1 if the first operand is greater than the second or −1 otherwise 
  IGTZ Evaluates the first operand. If it evaluates as greater than zero the result of evaluating the second operand is returned otherwise the result of evaluating the third operand is returned 
   Returns 1 if the first operand is less than the second or −1 otherwise 
  X Returns the product of two operands 
Terminal nodes 
  B1 Packs the single largest item into the current bin returning 1 if successful or −1 otherwise 
  B2 Packs the largest combination of exactly two items into the current bin returning 1 if successful or −1 otherwise 
  B2A Packs the largest combination of up to two items into the current bin giving preference to sets of lower cardinality. Returns 1 if successful or −1 otherwise 
  B3A As for B2A but considers sets of up to three items 
  B5A As for B2A but considers sets of up to five items 
  C Returns the bin capacity 
  FS Returns the free space in the current bin 
  INT Returns a random integer value  
  W1 Packs the smallest item into the current bin returning 1 if successful, else −1 
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