const M: array[1..8] of real = (0.1, 5.6, 0.8, 2.4, 7.3, 6.8, 0.5, 2.3);

var x,y : file of real;

n: real; i: byte;

begin

assign(x,'x.dat');

assign(y,'y.dat');

rewrite(x);

for i:=1 to 8 do write(x, M[i]);

close(x);  

reset(x);

rewrite(y);

i := 1;

while not EOF(x) do begin

read(x, n);

if not odd(i) then

write(y, n);

i := i + 1;

end;

close(x);

close(y);

  reset(y);

while not EOF(y) do begin

read(y, n);

write(n:5:1);

end;

writeln;

close(y);

end.