Use the <A HREF=hw-drunken_man.html>simOneIteration()</A> function
defined in the previous exercise, write a program to simulate n
iterations, in which  the drunken man always starts from the same
position.  Estimate the probability that the man returns home safely.

<HR>
The program may run as follows.
<PRE>
<CODE>
Input the initial position and number of iterations (p, n) -- <B>3, 10000</B>
Probability:
Home    6949    69.5%
River   3051    30.5%

Input the initial position and number of iterations (p, n) -- <B>6, 20000</B>
Probability:
Home    8026    40.1%
River   11974   59.9%

</CODE>
</PRE>