program z7_21;
const n=20;
var a:array[1..n] of integer;
g:integer;i:integer;
begin
randomize;
for I:=1 to n do begin a[i]:=random(100);
write(a[i]:3);end;
i:=2;
g:=0;
while i<=n do begin g:=g+a[i];i:=i+2;
end; writeln;
writeln(g);
end.