program Project2;

{$APPTYPE CONSOLE}
var
a:array [1..1000] of integer;
s,n,i:integer;
begin
readln(n);
s:=0;
for i:=1 to n do
readln(a[i]);
for i:=1 to n do
begin
if a[i]<n then s:=s+a[i];
end;
writeln(s);
readln;
readln;
end.