111111123

#include <iostream>
#include <cmath>

using namespace std;

double S(double a, double b, double c) {
    double p = (a + b + c) / 2;
    return sqrt(p*(p - a)*(p - b)*(p - c));
}

double R(double x1, double y1, double x2, double y2) {
    return sqrt((x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2));
}

int main() {
    int g, k, x, y, r, p = 0;
    double Ax = 400, Ay = 400, Bx = 606, By = 606, Cx = 812, Cy = 400, Dx = 606, Dy = 194;
    double AB, AC, BC, CD, AD, A0, B0, C0, D0, s, ss, s1, s2, s3, s4, s5;

    AB = R(Ax, Ay, Bx, By); AC = R(Ax, Ay, Cx, Cy);
    BC = R(Bx, By, Cx, Cy); CD = R(Cx, Cy, Dx, Dy);
    AD = R(Ax, Ay, Dx, Dy); s1 = 0; s2 = 0; s3 = 0;
    s = S(AB, BC, AC); ss = S(AC, AD, CD);
    cout << "\n Input X: "; cin >> x;
    cout << "\n Input Y: "; cin >> y;
    cout << "\n Input R: "; cin >> r;
    for (g = Ax; g<Bx; g++) {
        for (k = Cy; k<By; k++) {
            A0 = R(Ax, Ay, g, k); B0 = R(Bx, By, g, k);
            C0 = R(Cx, Cy, g, k); D0 = R(Dx, Dy, g, k);
            s1 = S(AB, B0, A0); s2 = S(BC, B0, C0); s3 = S(AC, C0, A0);
            s4 = S(CD, C0, D0); s5 = S(AD, A0, D0);
            if ((R(x, y, g, k) <= r*r && ((s == s1 + s2 + s3) || (ss == s3 + s4 + s5)))) { p++; }
        }
    }
    cout << p << endl;
    return 0;
}