#define _USE_MATH_DEFINES

#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max,count
#include <string>	//string,getline, to_string
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap, pair
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt,ceil,M_PI, pow, sin
#include <sstream>	//stringstream, getline
#include <numeric>	//gcd, accumlate
#include <deque>	//deque
#include <random>	//randam_device
#include <limits>	//numeric_limits

using namespace std;
constexpr long long int D_MOD = 1000000007;

inline double Calc(int x, int y) {

	double ans;
	double temp = sqrt(x * x + y * y);
	temp = temp * 100;
	int temp2 = round(temp);
	ans = temp2 / 100.0;

	return ans;
}

int main() {

	double N;
	cin >> N;

	int x = 1, y = 1;

	int ans = 0;

	while (1) {
		y = 1;
		double n1 = Calc(x, y);
		if (N == n1) {
			ans++;
			break;
		}
		else if (n1 > N) {
			break;
		}
		else {
			while (1) {
				y++;
				double n2 = Calc(x, y);
				if (N == n2) {
					ans++;
					break;
				}
				else if (n2 > N) {
					break;
				}
			}
		}
		x++;
	}

	cout << ans << endl;

	return 0;

}