program
zadacha;
var
a:
array[1..1000] of integer;
i,n:
integer;
begin
writeln('vvedite
kol-vo elementov massiva');
readln(n);
for i:=1 to
n do begin
a[i]:=random(1000)-500;
write(a[i]:7);
end;
writeln;
for i:=1 to
n do begin
if i mod 2 =0 then a[i]:=sqr(a[i]);
end;
writeln;
for i:=1 to
n do begin
write(a[i]:7);
end;
end.