uses crt;
const fi='dl.txt'
fo='soam.txt'
var f1,f2:text;
a:array[1..100]of integer;
i,n:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eoln(f1) do
begin
n:=n+1;
read(f1,a[n]);
end;
for i:=1 to n do
begin
if a[i]>0 then writeln('Can bac hai cua ',a[i],' la: ',sqrt(a[i]):4:2)
else if a[i]<0 then write(f2,a[i]:4);
end;
close(f1);
close(f2);
readln;
end.