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

int main() {
  int x;
  cin>>x;
  
  if(x>=0) cout<<x;
  else if(x<0) cout<<0;

}
#include<bits/stdc++.h>
#define ll          long long int
#define nl          '\n'
#define pi          acos(-1)
#define GCD(a, b)       __gcd(a, b)
#define boost       ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define inout       freopen("input.txt","r",stdin);freopen("output.txt","w",stdout)

using namespace std;

int main(void){
    //boost;

    ll t,k,n,m,mi=0,mx=0,ans=0,po=0,ne=0,cnt=0,sum=0;

      cin>>t;

      //vector<ll>a(t);
       ll ar[1001];
      map<char,int>mp;
      vector<string>str(105);
      bitset<6>set_t;

read:
   if(t>=0) cout<<t;
   else cout<<0;
}
