program N1;
var s,n: integer;
begin
writeln ('vvedit chislo');
readln (n);
s:=0;
while n<>0 do
begin
s:=s+n mod 10;
n:=n div 10;
end;
writeln (s);
readln
end.
program N1;
var s,n: integer;
begin
writeln ('vvedit chislo');
readln (n);
s:=0;
while n<>0 do
begin
s:=s+n mod 10;
n:=n div 10;
end;
writeln (s);
readln
end.