function F = KBg19F(x)
%

F(1) = -0.85929 + (1-x(2)) + x(3) + x(4) - x(6)*x(4) - x(7)*x(3) - x(7)*x(4) + x(7)*x(6)*x(4);
F(2) = -0.71129 + (1-x(2)) + (1-x(1)) - x(8)*(1-x(1));
F(3) = -0.87605 + (1-x(2)) + (1-x(1)) + x(5) - x(9)*x(5) - x(10)*(1-x(1)) - x(10)*x(5) + x(10)*x(9)*x(5);
F(4) = -0.86249 + (1-x(5)) + (1-x(3)) + (1-x(1)) - x(11)*(1-x(1)) - x(12)*(1-x(3)) - x(12)*(1-x(1)) + x(12)*x(11)*(1-x(1));
F(5) = -0.69865 + (1-x(1)) + x(3) - x(13)*x(3);
F(6) = -0.71772 + (1-x(3)) + (1-x(1)) - x(13)*(1-x(1));
F(7) = -0.68897 + (1-x(5)) + (1-x(1)) - x(14)*(1-x(1));
F(8) = -0.69865 + (1-x(3)) + x(1) - x(14)*x(1);
F(9) = -0.83548 + (1-x(3)) + x(4) + x(5) - x(15)*x(5) - x(16)*x(4) - x(16)*x(5) + x(16)*x(15)*x(5);
F(10) = -0.53499 + (1-x(2));
F(11) = -0.78637 + (1-x(4)) + (1-x(1)) + x(3) - x(17)*x(3) - x(18)*(1-x(1)) - x(18)*x(3) + x(18)*x(17)*x(3);
F(12) = -0.83674 + (1-x(2)) + x(4) + x(5) - x(19)*x(5) - x(20)*x(4) - x(20)*x(5) + x(20)*x(19)*x(5);
