[Страдалецъ]

Вот рабочий вариант, смотрите:

Код:

uses
  SysUtils;

var
  f:textfile;
  a: array [1..100000] of double;
  d: integer;
  n,i: integer;
  min: double;
  s: String;
begin
 assignfile(f,'d:\text1.txt');
 reset(f);
 readln(f, s);
 n := StrToInt(s);
 readln(f, s);
 min := StrToFloat(s);
 a[1] := min;
 for i := 2 to n
 do begin
    readln(f, s);
    a[i] := StrToFloat(s);
    if a[i] < min
    then min := a[i];
    end;
 WriteLn(FloatToStr(min));
 ReadLn;
 Closefile(f);
end.