User-agent: *
Disallow: /user
Disallow: /?

User-agent: Yandex
Disallow: /user
Disallow: /?

User-agent: *
Disallow: /admin
Disallow: /?

User-agent: Yandex
Disallow: /admin
Disallow: /?

User-agent: *
Disallow: /advertiser
Disallow: /?

User-agent: Yandex
Disallow: /advertiser
Disallow: /?