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

int main()
{
    long num, num1;
    FILE *fptr;
    FILE *fptr1;

    fptr = fopen("D:\\CLion Projects\\second_project\\adunare.in", "r");
    fptr1 = fopen("D:\\CLion Projects\\second_project\\adunare.out", "w");

    fscanf(fptr,"%lld", &num);
    fscanf(fptr,"%lld", &num1);

    if( num+num1 > 2000000000){
        return 0;
    } else {
        fprintf(fptr1, "%lld", num + num1);
    }

    fclose(fptr);
    fclose(fptr1);

    return 0;
}