#include <fstream>
#include <iostream>
using namespace std;
ifstream fin("date.in");

int cifreegale(int n)
{
    int c=n%10;
    while(n)
    {
        if(n%10!=c) return 0;
        n=n/10;
    }
    return 1;
}

int main()
{
    int n,k=0;
    while(fin>>n)
        if(cifreegale(n)) k++;
    cout<<k;
    fin.close();
    return 0;
}