#include <stdio.h>
#include <stdlib.h>


void start()
{
	FILE* fIn,*fOut;
	int a,b,result;

	fIn=fopen("adunare.in","r");
	fOut=fopen("adunare.out","w");

	if(fIn==NULL)
	{
		perror("Error at reading the input file.");
		exit(1);
	}

	if(fOut==NULL)
	{
		perror("Error at creating the output file.");
		exit(1);
	}

	while(!feof(fIn))
	{
		fscanf(fIn,"%d",&a);
		fscanf(fIn,"%d",&b);
		result=a+b;
		fprintf(fOut,"%d",result);
	}
	fclose(fIn);
	fclose(fOut);
}


int main(int argc,char*argv[])
{

	start();
	return 0;
}