User-agent: *
Disallow: /category/f/
Disallow: /search/

User-agent: Googlebot
Disallow: /statistics
Disallow: /category/f/

User-agent: Bingbot
Disallow: /statistics
Disallow: /category/f/

User-agent: msnbot
Disallow: /statistics
Disallow: /category/f/