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package sort
import (
"algorithms/ds"
)
func BottomUpMerge(a ds.ArrayList) ds.ArrayList {
l := len(a)
aux := make(ds.ArrayList, l)
for sz := 1; sz < l; sz = sz + sz {
for lo := 0; lo < l-sz; lo += sz + sz {
merge(a, aux, lo, lo+sz, min(lo+sz+sz-1, l-1))
}
}
return a
}
func min(a, b int) int {
if a <= b {
return a
}
return b
}
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