program p2(input,output);
{programmer:mogtaba amirzade date:1382/08/13
time:21,45'
url http:\\www.ifjam.com
}
var
i,n:integer;
s,x:real;
begin
assign(input,'a:\programs\inp2.dat');
reset(input);
assign(output,'a:\programs\outp2.dat');
rewrite(output);
readln(n);
s:=0;
while i<n do
begin
readln(x);
s:=s+x;
i:=i+1;
end;
writeln(s:1);
readln
end.