varc: array[1..30] of integer;i,n,k:integer;beginn:=0;k:=0;for i:=1 to 30 doreadln(c[i]);
for i:=1 to 30 do beginif c[i]<0 then beginn:=n+1;k:=k+c[i];end;end;writeln('srednee=', k/n )end.