program a1;
uses crt;
type
mas=array [1..20] of integer;
var
a: mas;
i,n: integer;
function col(a2:mas;n2:integer):longint;
var
c: integer;
begin
c:=0;
for i:=1 to n2 do
if a2[i]<>0 then inc(c);
if c=0 then col:=7777777
else col:=c;
end;
begin
clrscr;
writeln('Vvedite 20 chisel:');
for i:=1 to 20 do
read(a[i]);
write('Vvedite N: ');
readln(n);
writeln('Resultat: ',col(a,n));
end.