uses crt;
var s,i:integer;
a:array[1..10]of integer;
begin
clrscr;
randomize;
for i:=1 to 10 do
begin
a[i]:=random(10);
write(a[i]:3);
end;writeln;
for i:=2 to 10 do
begin
s:=s+a[i]*a[i-1];
end;
writeln(s);
readln;
end.