101130: [AtCoder]ABC113 A - Discount Fare
Memory Limit:256 MB
Time Limit:2 S
Judge Style:Text Compare
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Description
Score: $100$ points
Problem Statement
There is a train going from Station $A$ to Station $B$ that costs $X$ yen (the currency of Japan).
Also, there is a bus going from Station $B$ to Station $C$ that costs $Y$ yen.
Joisino got a special ticket. With this ticket, she can take the bus for half the fare if she travels from Station $A$ to Station $B$ by train and then travels from Station $B$ to Station $C$ by bus.
How much does it cost to travel from Station $A$ to Station $C$ if she uses this ticket?
Constraints
- $1 \leq X,Y \leq 100$
- $Y$ is an even number.
- All values in input are integers.
Input
Input is given from Standard Input in the following format:
$X$ $Y$
Output
If it costs $x$ yen to travel from Station $A$ to Station $C$, print $x$.
Sample Input 1
81 58
Sample Output 1
110
- The train fare is $81$ yen.
- The train fare is $58$ ⁄ $2=29$ yen with the $50$% discount.
Thus, it costs $110$ yen to travel from Station $A$ to Station $C$.
Sample Input 2
4 54
Sample Output 2
31