#include<iostream>
using namespace std;
class Bank{
    public:
    int total(int a,int b)
    {
        //cout<<a+b;
        return a+b;
    }
};
int main()
{
    int a,b;
    cin>>a>>b;
    if(a<0||b<0)
    {
        cout<<"Invalid input";
        return 0;
    }
    bank obj ;
    cout<<obj.total(a,b);
    return 0;
}