implement StringIntTab; include "strinttab.m"; lookup(t: array of StringInt, key: string) : (int, int){	min := 0;	max := len t-1;	while(min <= max){		try := (min+max)/2;		if(t[try].key < key)			min = try+1;		else if(t[try].key > key)			max = try-1;		else			return (1, t[try].val);	}	return (0, 0);} revlookup(t: array of StringInt, val: int) : string{	n := len t;	for(i:=0; i < n; i++)		if(t[i].val == val)			return t[i].key;	return nil;}