#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
#include <chrono>
using namespace std;

int main(){
	long long a,b;
	cin >> a >> b;
	long long ans = -a -b;
	cout << -ans << endl;
	return 0;
}