var n,i : integer;
s:double;
begin
write('n = ');
readln(n);
s:=0;
for i:=1 to n do
s:=s+i*i;
writeln('s = ',s);
readln;
end.
var n,i : integer;
s:double;
begin
write('n = ');
readln(n);
s:=0;
for i:=1 to n do
s:=s+i*i;
writeln('s = ',s);
readln;
end.