#include <bits/stdc++.h>
using namespace std;
int main() {
long long x,y;
cin>>x>>y;
if(x>0){
y=x+1;
cout<<y;
}
if(x=0){
y=0;
cout<<y;
}
if(x<0){
y=x-1;
cout<<y;
}
    return 0;
}