program mass1;
uses crt;
var
n, i, k: integer;
a: array [1 .. 100] of integer;
function SmZn(n: integer): integer;
var
k: integer;
begin
k := 0;
for i := 1 to n do
begin
if a[i] * a[i + 1] < 0 then
k := k + 1;
end;
SmZn := k;
end;
begin
clrscr;
write('n=');
readln(n);
randomize;
for i := 1 to n do
begin
a[i] := random(15) - 10;
write(a[i], ' ');
end;
readln;
write('k=', SmZn(n));
readln;
end.