const N=5;
var a: array [1..N] of integer;
  i,j,k,imax,kmax: integer;
begin
    for i:=1 to N do readln(a[i]);

    kmax := 0;
    for i:=1 to n do
    begin
          j:=2;
          while(j<a[i]) do
          begin
              if(a[i] mod j = 0) then
              begin
                    k:=k+1;
              end;

              j := j + 1;
          end;
          if(k > kmax) then
          begin
              kmax := k;
              imax := i;
          end;
    end;
    writeln(imax);

end.