uses crt;
var a:array[1..100] of integer;
i,n,ln:integer;
begin
clrscr;
readln(n);
for i:=1 to n do
readln(a[i]);
ln:=0;
for i:=1 to n do
if trunc(sqrt(A[i]))=sqrt(a[i]) then
begin
write(a[i]:4);
if ln<A[i] then ln:=A[i];
end;
writeln;
writeln('So chinh phuong lon nhat la: ',ln);
readln;
end.