program thu_nhap_trung_binh;
uses crt;
var A:array[1..1000] of longint;
n,i:integer;
t:longint;
begin
clrscr;
write('Nhap so ho dan: '); readln(n);
t:=0;
for i:=1 to n do
begin
write('Nhap thu nhap cua gia dinh thu ',i,': '); readln(A[i]);
t:=t+A[i];
end;
write('Thu nhap trung binh o khu pho la: ',t/n:0:0);
readln;
end.