#pragma GCC optimize("O3")
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
//#define d  long double
//#define d long double
#define pii pair<int,int>
#define pb push_back
#define N 200003
#define inf (int)1e18
#define haha ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
i
 
signed main()
{
    haha
    int n;
    cin>>n;
    cout<<(n+1)/2;
  
 
    
    
}