a- insert frist
b- insert before
c- insert last
d- delete
e- search
f- count elements in list
g- display
a- push
b- pop
c- count elements in list
d- display
a- enqueue
b- dequeue
c- count elements in list
d- crear all elements in list
e- get rear
f- get front
g- display
a- insert
b- preorder
c- inorder
d- search
e- minimun element in list
f- maximun element in list
g- delete
a- Selection Sort
b- Merge Sort
c- Insertion Sort
d- Quick Sort