#include <stdio.h>
#include "iostream"
#include "math.h"
using namespace std;
int main()
{
    int numbers,i,n,counter = 0;
    for (i = 0;i<1000;i++)
    {
        while(i)
        {
            i = i*10+n%10;
            n /= 10;
        }
        if ( sqrt(i) % 1 == 0)
            counter ++;
    }
    cout << counter << endl;
}