{ NOTE: it is recommended to use this even if you don't understand the following code }

const
    MAXM = 100000;
    MAXN = 100000;

var
    M, N, i : LongInt;
    A       : Array[0..MAXN-1] of LongInt;
    B       : Array[0..MAXM-1] of LongInt;
    P       : Int64;

begin
{
    uncomment the two following lines if you want to read/write from files
    assign(input,  'input.txt');  reset(input);
    assign(output, 'output.txt'); rewrite(output);
}

    ReadLn(N, M);
    
    for i:=0 to N-1 do
        Read(A[i]);
    ReadLn();
    
    for i:=0 to M-1 do
        Read(B[i]);
    ReadLn();
    
    P := 0;
    
    { INSERT YOUR CODE HERE }
    
    
    WriteLn(P);

end.