program bai_giai; uses crt; var A:array[1..200] of integer; n,i,d:integer; begin clrscr; write('Nhap so phan tu: '); readln(n); for i:=1 to n do begin write('Nhap phan tu thu ',i,': '); readln(A[i]); end; d:=0; for i:=1 to n div 2 do if A[i]<>A[n-i+1] then d:=d+1; if d=0 then write('Doi xung') else write('Khong doi xung'); readln; end.
