t = int(input())
print(t//2+1)
#include<bits/stdc++.h>
#include<vector>
using namespace std;
#define ll long long int
void solve(){
ll n;
cin>>n;
cout<<(n/2)+1<<endl;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int t = 1;
//cin >> t;
while(t--)
solve();
}
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