#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string.h>

using namespace std;

int main()
{
    ifstream fin("adunare.in");

    int a, b, c;
    fin >> a >> b;
    c = a + b;

    char s1[100] = "echo ";
    char s2[100];
    char s3[] = " >> adunare.out";
	
    sprintf(s2, "%d", c);

    strcat(s1, s2);
    strcat(s1, s3);

    system(s1);

	ofstream fout("adunare.out", std::ios_base::app | std::ios_base::out);
    fout.close();
    return 0;
}