[ library(fd_global) | Reference Manual | Alphabetic Index ]

atleast(+N, ?Vars, +V)

At least N elements of Vars have the value V.
+N
An integer
?Vars
A collection (a la collection_to_list/2) of domain variables or integers
+V
An integer

Description

This constraint ensures that at least N element of Vars have the value V. As soon as some domain variable from the collection is updated, this constraint is woken and it checks if the constraint is still satisfiable and if so, if it is already satisfied or not.

Fail Conditions

Fails if less than N elements of Vars can take value V.

See Also

atmost / 3, occurrences / 3, lists : collection_to_list / 2