Program Hotboy;

Uses crt! 

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

I,n,k : integer;

Begin

Clrscr ;

Write('nhao so phan tu trong day'); readln(n);

For i:=1 do n do 

Begin

Write('A[',i,']'); readln(A[i]); 

End;

Write('vi tri chen '); readln(k);

For i:=n+1 downto k+1 do

A[i] :=A[i-1];

Write('nhap so can chen'); readln(A[i]);

For i:=1 to n+1 do 

Write(A[i]);

Readln

End.

uses crt;
var n,i,k,m:longint;
    a:array[1..10000] of longint;
BEGIN
        clrscr;
        write('nhap n: ');readln(n);
        write('nhap k: ');readln(k);
        write('nhap so can chen: ');readln(m);
         for i:=1 to n do
           begin
                write('a[',i,'] = ');readln(a[i]);
           end;
         for i:=1 to k do write(a[i],' ');
        write(m,' ');
         for i:=k+1 to n do write(a[i],' ');
        readln;
END.

Miễn sao output đúng là được :)))