var a,b,c,d,e,f:longint;
begin
read(a);
b:=a mod 10;
c:=a mod 100 div 10;
d:=a div 100 mod 10;
e:=a div 1000;
f:=b+c+d+e+a;
write(f);
end.
/**************************************************************
	Problem: 1617
	User: admin
	Language: Pascal
	Result: Wrong Answer
****************************************************************/