import java.util.Scanner; public class Main { public static void main(String[] args) { new Main().solver(); } void solver() { // double constant_of_NaCl = calculator(0) * 2; // double constant_of_CsCl = calculator(1); double constant_of_NaCl = -3.4951291900072743; double constant_of_CsCl = -2.0353641336977053; Scanner sc = new Scanner(System.in); double A = 0, B = 0, C = 0, D = 0, E = 0; double[] in = new double[16]; for (int i = 0; i < 16; i++) { in[i] = sc.nextDouble(); assert Math.abs(in[i]) >= 0 && Math.abs(in[i]) <= 6; } A += in[0]; B += in[1]; B += in[2]; C += in[3]; B += in[4]; C += in[5]; C += in[6]; D += in[7]; for (int i = 0; i < 8; i++) { E += in[i + 8]; } assert 4 * (A + D) + E == 0; assert (A + B + C + D + E) == 0; final double m100 = -1.0 / 6.0 * constant_of_NaCl + 1.0 / 3.0 * constant_of_CsCl; final double m110 = 1.0 / 6.0 * constant_of_NaCl; System.out.println((3 * A + B) * m100 + (3 * A + C) * m110); } double[][] make_sample_of_NaCl() { double[][] p = new double[4][27]; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { for (int k = 0; k < 3; k++) { p[0][(9 * i + 3 * j + k)] = i; p[1][(9 * i + 3 * j + k)] = j; p[2][(9 * i + 3 * j + k)] = k; p[3][(9 * i + 3 * j + k)] = (i + j + k) % 2 == 0 ? 1 : -1; } } } return p; } // NaCl:0 // CsCl:1 double calculator(int isNaClorCsCl) { double[][] p = make_sample_of_NaCl(); double[][] axis = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } }; if (isNaClorCsCl == 1) axis = new double[][] { { 0.5, 0.5, -0.5 }, { -0.5, 0.5, 0.5 }, { 0.5, -0.5, 0.5 } }; double sum = 0; // p1 and p2 show the point of the cell. // for (int i = 0; i <= 50; i++) { // for (int p1 = 0; p1 <= i; p1++) { // for (int p2 = 0; p2 <= i; p2++) { // sum += calc(p1, p2, i, p, axis); // sum += calc(p2, i, p1, p, axis); // sum += calc(i, p1, p2, p, axis); // } // sum -= calc(i, i, p1, p, axis); // sum -= calc(i, p1, i, p, axis); // sum -= calc(p1, i, i, p, axis); // } // sum += calc(i, i, i, p, axis); // } for (int i = isNaClorCsCl == 0 ? 0 : -50; i <= 50; i++) { for (int j = isNaClorCsCl == 0 ? 0 : -50; j <= 50; j++) { for (int k = 0; k <= 50; k++) { sum += calc(i, j, k, p, axis); } } } return sum * (isNaClorCsCl == 0 ? 8 : 2); } double calc(int nx, int ny, int nz, double[][] p, double[][] axis) { double sum = 0; int n = p[0].length; for (int i = 0; i < n; i++) { double x = 2 * nx + p[0][i]; double y = 2 * ny + p[1][i]; double z = 2 * nz + p[2][i]; if (x == 0 && y == 0 && z == 0) continue; double coe = 1; if ((p[0][i] == 2 || p[0][i] == 0) && (p[1][i] == 2 || p[1][i] == 0) && (p[2][i] == 2 || p[2][i] == 0)) coe *= solid_angle(p[0][i] == 2 ? vector_minus(axis[0]) : axis[0], p[1][i] == 2 ? vector_minus(axis[1]) : axis[1], p[2][i] == 2 ? vector_minus(axis[2]) : axis[2]) / (4 * Math.PI); else if (((p[0][i] == 2 || p[0][i] == 0) && (p[1][i] == 2 || p[1][i] == 0)) || ((p[1][i] == 2 || p[1][i] == 0) && (p[2][i] == 2 || p[2][i] == 0)) || ((p[2][i] == 2 || p[2][i] == 0) && (p[0][i] == 2 || p[0][i] == 0))) { double[][] v = new double[2][3]; int c = 0; for (int j = 0; j < 3; j++) { if (p[j][i] == 2 || p[j][i] == 0) { if (p[j][i] == 2) v[c++] = vector_minus(axis[j]); else v[c++] = axis[j]; } } coe *= dihedral_angle(v[0], v[1]) / (2 * Math.PI); } else if ((p[0][i] == 2 || p[0][i] == 0) || (p[1][i] == 2 || p[1][i] == 0) || (p[2][i] == 2 || p[2][i] == 0)) coe *= 0.5; sum += p[3][i] / dist(0, 0, 0, x, y, z, axis) * coe; } return sum; } double dist(double x1, double y1, double z1, double x2, double y2, double z2, double[][] axis) { return Math.sqrt((x1 - x2) * (x1 - x2) * dot_product(axis[0], axis[0]) + (y1 - y2) * (y1 - y2) * dot_product(axis[1], axis[1]) + (z1 - z2) * (z1 - z2) * dot_product(axis[2], axis[2]) + dot_product(axis[0], axis[1]) * 2 * (x1 - x2) * (y1 - y2) + dot_product(axis[1], axis[2]) * 2 * (y1 - y2) * (z1 - z2) + dot_product(axis[2], axis[0]) * 2 * (z1 - z2) * (x1 - x2)); } double dot_product(double[] p, double[] q) { double ret = 0; for (int i = 0; i < 3; i++) { ret += p[i] * q[i]; } return ret; } double dihedral_angle(double[] p, double[] q) { return Math.acos(dot_product(p, q) / (vector_length(p) * vector_length(q))); } double vector_length(double[] p) { return Math.sqrt(dot_product(p, p)); } double solid_angle(double[] v1, double[] v2, double[] v3) { return dihedral_angle(v1, v2) + dihedral_angle(v2, v3) + dihedral_angle(v3, v1) - Math.PI; } double[] vector_minus(double[] v) { return new double[] { -v[0], -v[1], -v[2] }; } }