레이팅 미적용The owner of a donut shop spends the day baking and selling
donuts.
Given the events that happen over the course of the day, your job is
to determine the number of donuts remaining when the shop closes.
The first line of input contains a non-negative integer, \(D\), representing the number of donuts
available when the shop first opens.
The second line contains a positive integer, \(E\), representing the number of events that
happen over the course of the day. The next \(E\) pairs of input lines describe these
events.
The first line in the pair contains either the + (plus)
symbol, indicating that donuts have been baked, or the -
(minus) symbol, indicating that donuts have been sold. The second line
in the pair contains a positive integer, \(Q\), representing the quantity of donuts
associated with the event.
For each sale of donuts, the value of \(Q\) will be less than or equal to the
number of donuts available at that time.
Output the non-negative integer, \(R\), which is the number of donuts
remaining when the shop closes.
10
3
+
24
-
6
-16The shop opened with \(10\) donuts
and there were \(3\) events during the
day. The owner first baked \(24\)
donuts. Then the owner sold \(6\)
donuts, followed by another \(12\). The
number of donuts remaining is \(10+24-6-12=16\).