const
maxn = 1000;
var
mas: array [1 .. maxn] of real;
average, k, l, sum: real;
i, n: longint;
begin
randomize;
write('Vvedite kol-vo elementov N: ');
readln(n);
sum := 0;
for i := 1 to n do
begin
mas[i] := random(maxn);
sum := sum + mas[i];
end;
average := sum / n;
l := 0;
for i := 1 to n do
begin
k := mas[i] - average;
k := k * k;
l := l + k;
end;
l := l / n;
l := sqrt(l);
writeln('dlya vektora iz ', n, ' chisel: ');
for i := 1 to n do
write(mas[i]:0:0, ' ');
writeln;
writeln('Srednee = ', average:0:3);
writeln('Srednee kvadr otkl ot srednego = ', l:0:3);
readln;
end.