#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef long long ll;

template<typename T>bool chmax(T &a, const T& b){if(a<b){a=b;return true;}return false;}
template<typename T>bool chmin(T &a, const T& b){if(a>b){a=b;return true;}return false;}

int main(){
    int N;cin>>N;
    if(N%2==0){
        cout<<N/2<<endl;
    }
    else{
        cout<<1<<endl;
    }
    return 0;
}