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(void){
  long long N,M;
  scanf("%lld %lld",&N,&M);

  long long P[N],Y[M];
  for(long long j=0;j<M;j++){
    scanf("%lld %lld",&P[j],&Y[j]);
  };
 long long count = 0;
  for(long long k=0;k<M;k++){
 for(long long j=0;j<M;j++){
      if(P[k]==P[j] && Y[k] > Y[j]){
	    count++;
	  };
	};
   
 printf("%06lld%06lld\n",P[k],count+1);
 count = 0;
	};
  return 0;
}