fork(3) download
copy 
  1. var
  2.   a, b, s: Integer;
  3. begin
  4.   Writeln('vvedite chisla');
  5.   a := 0;
  6.   s := 0;
  7.   read(b);
  8.   while b <> 0 do
  9.   begin
  10.     if a * b < 0 then
  11.       inc(s);
  12.    a := b;
  13.    read(b);
  14.   end;
  15.   writeln(s);
  16.   Readln;
  17. end.
Success #stdin #stdout 0s 232KB
comments (?)
stdin
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1 -2 3 3 -2 5 6 7 0
stdout
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vvedite chisla
4
https://ideone.com/8KSlmy
language:
Pascal (fpc 3.0.4)
created:
10 years ago
visibility:
secret

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