program program3;

var

  u:array[0..3] of integer;

  a,b,c,x,y,z:integer;

begin

  read(u[0],u[1],u[2],u[3]);

  a:=u[0]+u[1]+u[2]+u[3]-5;

  b:=u[0]*(u[1]-u[2] div u[3]+8);

  c:=u[0]*u[1] div u[2] * u[3];

  x:=(a+b+2)*3-u[(c+3) mod 4];

  y:=(c*100-13) div a div (u[b mod 3]*5);

  if ((x+y) mod 2=0) then z:=(a+b+c+x+y) div 2;

  z:=(a+b+c-x-y)*2;

  writeln(x+y-z);

  read(a);

end.

输出：_____________________。