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：263