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>
int main(){
  int n,t,a,h;
  double ondo;
  int near,cnt=0,kaisu;
  scanf("%d",&n);
  scanf("%d %d",&t,&a);
  near = a;
  while(n > 0){
    cnt++;
    scanf("%d",&h);
    ondo = t - h * 0.006;
    if(cnt == 1){
      near = ondo;
      kaisu = 1;
    }else if((a - ondo)*(a - ondo) < (a - near)*(a - near)){
      near = ondo;
      kaisu = cnt;
    }
    n--;
  }
  printf("%d\n",kaisu);
  return 0;
}