var
  x,y : array [1..100] of real;
  x1,x2,x3,x4,y1,y2,y3,y4 : real;
  n,i,k,sum : longint;
begin
  readln(x1);
  readln(y1);
  readln(n);
  for i:=1 to 2 do
    readln(x[i],y[i]);
  for i:=1 to 2 do
    sum:=0;
  for i:=1 to 2 do
    sum:=sum+x;
  writeln(sum);
end.