Question 175456
if we add all the clear units(1/2days) with all the rain units(1/2days) and divide by 2 we should get the number of vacation days.
:
{{{highlight((23+13)/2=18)}}}days
:
<pre>
:
            1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
            **************************************************
Morning     C C R C C R R C C  R  R  C  C  C  R  C  C  R
            **************************************************
afternoon   R C C R C C C R C  C  C  R  R  C  C  R  C  C
            **************************************************

</pre>

C=clear
R=Rain