1D क्रमबद्ध डेटा पर श्रेणी खोज (range searching) का समर्थन करने वाले विकल्पों में से सबसे सरल डेटा संरचना कौन सी है?

What is the worst-case time complexity of inserting 'n' elements into an initially empty linked list such that the linked list remains sorted?

What are the contents of an initially empty stack (from bottom to top) after performing the following operations? PUSH(A); PUSH(B); PUSH(C); POP; PUSH(D); POP; POP; PUSH(E); PUSH(F); POP;