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>

#define MAX 1200
#define INF 120000

int main(void)
{
  int N, T, A, min = INF, index;
  int H[1200];

  scanf("%d %d %d", &N, &T, &A);

  for(int i=0; i<N; ++i) scanf("%d", &H[i]);

  for(int i=0; i<N; ++i) {
    H[i] = T - H[i] * 0.006;
    if(abs(A-min) > abs(A-H[i])) {
      min = H[i];
      index = i;
    }
  }

  printf("%d\n", index+1);

  return 0;
}