program tan_suat;
uses crt;
var A:array[1..30] of integer;
n,i,j,d,max:byte;
ptu,tg:integer;
begin
clrscr;
write('Nhap n: '); readln(n);
for i:=1 to n do
begin
write('A[',i,']= '); readln(A[i]);
end;
for i:=1 to n do
write(A[i],' ');
writeln;
for i:=1 to n-1 do
for j:=i+1 to n do
if A[i]>A[j] then
begin
tg:=A[i];
A[i]:=A[j];
A[j]:=tg;
end;
i:=1; d:=1; max:=1; ptu:=A[1];
while i<n do
begin
if A[i]=A[i+1] then d:=d+1
else begin
if d>=max then
begin
max:=d;
ptu:=A[i];
end;
d:=1;
end;
i:=i+1;
end;
writeln('So lan xuat hien nhieu nhat la: ',max);
writeln('Phan tu do la: ',ptu);
readln;
end.
