Program planeville;
const
    MAXN = 100000;
 
var
    N, S, i : LongInt;
    V       : Array[0..MAXN-1] of LongInt;
 
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);
 
    for i:=0 to N-1 do
        Read(V[i]);
    ReadLn();
 
    S := 0;
 
    for i:=0 to N do S:=S+(V[i]+2);
 
 
    WriteLn(S);
 
end.
 

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