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 Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int N=sc.nextInt();
    int T=sc.nextInt();
    int A=sc.nextInt();
    int[] num=new int[N];
    for(int i=0;i<N;i++){
      num[i]=sc.nextInt();
    }
    int[] tem=new int[N];
    for(int i=0;i<N;i++){
      double a=num[i]*0.006;
      tem[i]=T-(int)a;
    }
    int[]  answer=new int[2];
    answer[0]=tem[0];
    for(int i=1;i<N;i++){
      int sa=A-tem[i];
      if(sa<0) sa=sa*(-1);
      if(A-answer[0]>sa){
        answer[0]=tem[i];
        answer[1]=i;
       }
    }
    System.out.print(answer[1]+1);
  }
}