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 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(int argc, char const *argv[])
{
	int N,T,A;
	int H[1000],min_i;
	double div = 0.00,min = 200.00;

	scanf("%d%d%d",&N,&T,&A);
	for (int i = 0; i < N; ++i){
		scanf(" %d",&H[i]);
		div = fabs((double)A - ((double)T - (double)H[i] * 0.006));
		if(div < min){
			min = div;
			min_i = i;
		}
	}
	printf("%d\n", min_i);
	return 0;
}