Problem:
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

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
#include <vector>
#include <cmath>

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define SZ(x) ((int)(x).size())
using ll = long long;

using namespace std;

int main(){
	/*int n;
	cin >> n;
	int a[n];
	for(int i=0;i<n;i++)
	{
		int x;
		cin >> x;
		if(cin.eof())	break;	
		a[i]=x;
	}*/
	
	
	int x,y;
	
	cin >> x >> y;
	
	cout << x+y/2 << endl;
	
	return 0;
}