#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;
}
    

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int x, y;
    cin >> x;
    if (x > 0)
        y = x + 1;
    else if (x == 0)
        y = 0;
    else
        y = x - 1;
    cout << y << endl;
    return 0;
}