program ct;

uses crt;

var i,n,d,x:integer;

A:array[1..100] of integer;

begin

clrscr;

write('nhap n:=');readln(n);

for i:=1 to n do

begin

write('nhap mang A[',i,']:=');readln(A[i]);

end;

writeln;

writeln('day so vua nhap la:',);

for i:=1 to n do

write(A[i]:3);

write('nhap x:=');readln(x);

d:=0;

for i:=1 to n do

if A[i]=x then d:=d+1;

if d=0 then writeln(x,'khong co trong day') else

writeln(x,' xuat hien',d:2,'lan trong day');

readln

end.

program ct;

uses crt;

var A:array[1..100] of integer;

      i,n,x,dem:integer;

begin clrscr;

   write('Nhap so n: '); readln(n);

   for i:=1 to n do

     begin

        writeln('Nhap phan tu thu ',i,': '); readln(A[i]);

     end;

   writeln('Day so vua nhap: ',);

   for i:=1 to n do write(A[i]:3);

   write('Nhap so x: '); readln(x);

     dem:=0;

   for i:=1 to n do

     if A[i]=x then dem:=dem+1;

   writeln('Xuat hien ',dem,' so ',x);

readln;

end.

Học tốt!