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<bits/stdc++.h>
using namespace std;

#define all(a) a.begin(),a.end()
#define mp make_pair
#define F first
#define S second

typedef long long ll;
typedef std::vector<int>vi;
typedef std::vector<string>vs;
typedef std::vector<double>vd;
typedef std::vector<ll>vll;
typedef vector<vi>vvi;
typedef vector<vvi>vvvi;
typedef vector<vll>vvll;
typedef std::pair<int,int>pi;
typedef vector<pi>vpi;
typedef vector<vpi>vvpi;
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int x,y;
	cin>>x>>y;
	cout<<x+y/2;
	return 0;
}