#include<stdlib.h>
#include<stdio.h>
#include<unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(){
	
	int a,b,sum;
	int f,g;
	
	f=open("adunare.in",O_RDONLY);
	g=open("adunare.out",O_WRONLY);
	
	if(!f || !g)
		return 1;
	
	
	read(f,&a,sizeof(int));
	read(f,&b,sizeof(int));
	sum=a+b;
	write(g,&sum,sizeof(int));
	
	close(f);
	close(g);

	return 0;
}