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

#define FILE_OUT "adunare.out"
#define FILE_IN "adunare.in"

int main()
{
    FILE* pFileIN = NULL;
    FILE* pFileOUT = NULL;
    int a = 0;
    int b = 0;
    int sum =0;

    pFileIN = fopen(FILE_IN, "r");
    if (NULL != pFileIN)
    {
        fscanf(pFileIN, "%d", &a);
        fscanf(pFileIN, "%d", &b);
        sum = a + b;

        fclose(pFileIN);
    }

    pFileOUT = fopen(FILE_OUT, "w+");
    if (NULL != pFileOUT)
    {
        if (sum < 2000000000)
        {
            fprintf(pFileOUT,"%d",sum);
        }
        fclose(pFileOUT);
    }
    return 0;
}