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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include<stdio.h>

int main(){
	int N, T, A;
	scanf("%d%d%d", &N, &T, &A);
	T *= 1000;
	A *= 1000;
	int H[N];
	int t[N];
	int ans = 0;
	for(int i=0; i<N; i++){
		scanf("%d", &H[i]);
		t[i] = T - H[i]*6;
		if((t[i]>A?t[i]-A:A-t[i]) < (t[ans]>A?t[ans]-A:A-t[ans])){
			ans = i;
		}
	}
	printf("%d", ans+1);
	return 0;
}