stack

stack stack algorithms and data structures course data structures: stack stack is a data structure in which: items can be inserted only from one end. items can be taken only from the same end. the last inserted item is the first item to be taken. last input first output [lifo]. example: stack of plates. algorithms and data structures course data structures: stack operations push: inserts item to the top of the stack. time complexity is o(1). pop: removes items from the top of stack. time complexity is o(1). top: returns top element of the stack. time complexity is o(1). empty: returns “true”, if stack is empty. time complexity is o(1). size: returns size of stack. time complexity is o(1). algorithms …

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