mathPuzzle.py File Reference

Program to determine solution to math puzzle from the book "Hacking: The Art of Exploitation, 2nd Edition", by Jon Erickson. More...

Variables
	mathPuzzle.startT = monotonic_ns()
	Solver starting time.
tuple	mathPuzzle.num = ('1','3','4','6')
	Tuple of the four numbers that must be used (in string format)
	mathPuzzle.numLen = factorial(len(num))
	Integer representing the total unique combinations of numbers. More...
int	mathPuzzle.opRepeat = 3
	Number of operations needed to construct a possible solution.
tuple	mathPuzzle.op = ('+','-','*','/','+(','-(','*(','/(',')+',')-',')*',')/')
	Tuple of all possible operations.
int	mathPuzzle.opLen = len(op)**opRepeat
	Total number of combinations of three operations, with repeats allowed.
int	mathPuzzle.ans = 0
	Initialize answer variable.
int	mathPuzzle.counter = 1
	Counter variable for attempt number.
	mathPuzzle.numOptions = permutations(num)
	Intialize iterable for number sequences.
	mathPuzzle.nums = next(numOptions)
	tuple of number sequence from iterable numOptions
	mathPuzzle.opOptions = product(op, repeat = opRepeat)
	all possible operations, found using product()
	mathPuzzle.ops = next(opOptions)
	Tuple of operations from iterable opOptions
string	mathPuzzle.ansString = ''
	Initialized string for solution.
string	mathPuzzle.parenthDiff = ansString.count('(') - ansString.count(')')
	Integer value representing the number of ) needed to form a valid expression.

Detailed Description

Program to determine solution to math puzzle from the book "Hacking: The Art of Exploitation, 2nd Edition", by Jon Erickson.

See source code here: https://bitbucket.org/ryanmclaug/me_405/src/master/mathPuzzle.py

Author

Ryan McLaughlin

Date

Originally created on 04/09/21
Last modified on 04/19/21

Variable Documentation

numLen

mathPuzzle.numLen = factorial(len(num))

Integer representing the total unique combinations of numbers.

For example: 1,3,4,6 is different than 6,4,1,3 from a solver standpoint