const
    MAXN = 100000;
var
    D, N, i : longint;
    C       : array[0..MAXN-1] of longint;
    fr, fw  : text;

begin
    assign(fr, 'input.txt');
    assign(fw, 'output.txt');
    reset(fr);
    rewrite(fw);
    readln(fr, D, N);
    for i:=0 to N-1 do
        read(fr, C[i]);

    (* insert your code here *)

    close(fr);
    close(fw);
end.