var
  a : array [1..100] of longint;
  n,min,i,nom : longint;
begin
  for i:=1 to 10 do
    readln(a[i]);
    3:=a[1];
    nom:=1;
  for i:=1 to 10 do
    if a[i]=3 then begin
      3:=a[i];
      nom:=i;
    end;
  writeln(nom);
end.