utils

func AbsInt[T Integer](x T) T

func Choices[T any](collection [][]T) [][]T

func ExtGCD[I Integer](a, b I) (I, I, I)

func ExtLCM[I Integer](mu []I, lambda []I) (I, I)

func GCD[I Integer](a, b I) I

func IPow[I Integer](a, b I) I

func ISqrt[T Integer](x T) T

func LCM[I Integer](a, b I, integers ...I) I

func LineCounter(r *os.File) (int, error)

func Permute[T any, S []T](s S) []S

func SliceDifference[T comparable](a, b []T) []T

func SortedMerge[T cmp.Ordered](a, b []T) []T

func SortedUniqueInsert[T cmp.Ordered](x []T, e T) ([]T, bool)