#include <iostream>
#include <fstream>
using namespace std;
 
int main()
{
    unsigned int a,b;
    ifstream fin("adunare.in");
    fin>>a>>b;
    fin.close();
    ofstream fout("adunare.out");
	if (a < 1000) {
		fout<<a+b;
	} else {
		fout<<a-b;
	}
    fout.close();
    return 0;
}