#include <fstream>

using namespace std;
ifstream in("interval.in");
ofstream out("interval.out");
int main()
{
    int a,b,c,cc,cc1;
    in>>a>>b>>c;
    d=d-a+1;
    d=d-(a%9!=0)-(10-a%9)-(b%9==0)*(b%9);
    d/=9;
    cc=(a%9!=0)*(a%9)+(a&9==0)*9;
    cc1=(b%9!=0)*(b%9)+(b%9==0)*9;
    out<<d<<(cc<=c&&a%9!=1)+(cc1>=c&&b%9!=0)
    return 0;
}