#include <iostream>
int day[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int main()
{
    int res=0;
    for(int m=1;m<=12;++m)
        for(int d=1;d<=day[m];++d)
            res+=(m==d%10+d/10);
    std::cout<<res<<"\n";
}