#include <stdio.h>
#include <math.h>

int sq_frac(int x);

int N = 10000;

int main(int argc, char *argv[])
{
    int i, c;
    
    c = 0;
    for(i = 1; i <= N; ++i){
        if(sq_frac(i) % 2 == 0){
            ++c;
        }
    }
    printf("%d\n", c);
    return 0;
}

int sq_frac(int x)
{
    int m, n, d, a, c;
    
    if((m = sqrt(x)) * m == x){
        return 1;
    }
    d = c = 1;
    n = m;
    do{
        d = (x - n * n) / d;
        a = (n + m) / d;
        n = a * d - n;
        ++c;
    }while(d != 1);
    return c;
}