#include <iostream>

using namespace std;


long long a,n,k,x,b,c,i;
string s1,s2;

int main()
{
    cin>>a>>n>>x;
    if(a==n&&a==x&&n==x) cout<<"1"<<endl;
    else if(
            (a==n && a=!x)||
       (a==x && a=!n)||
        (n==x && n=!a)
            )cout<<"2"<<endl;
    else if (a=!n && a=!x && n=!x)cout<<"3"<<endl;



    /*for(i=1;i<=a;i++){
        cin>>s1 >> s2;
        s1[0]+=32;
        s2[0]+=32;
*/


   // cout<<s2<<"."<<s1<<"@retratek.com"<<endl;
    }
    return 0;
}