// editor4
#include<iostream>
using namespace std;
class bank{
    public:
    int total(int a,int 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);
    returm 0;
}