What is an auxiliary stack?
Auxiliary data structure is a fancy way of saying helper data structure. Something you might use to solve a given problem and is terminated after the problem is solved. For example, if I asked you to find the count of each element in an array. One way to do this is by using a hash table.
How many stacks are needed to implement a stack?
The problem is opposite of this post. We are given a stack data structure with push and pop operations, the task is to implement a queue using instances of stack data structure and operations on them. A queue can be implemented using two stacks.
How do you find the maximum element of a stack?
Now to compute the maximum of the main stack at any point, we can simply print the top element of Track stack.
- Step by step explanation :
- Step 1 : Push 4, Current max : 4.
- Step 2 : Push 2, Current max : 4.
- Step 3 : Push 14, Current max : 14.
- Step 4 : Push 1, Current max : 14.
- Step 5 : Push 18, Current max : 18.
How to create a stack that supports getmin ( )?
Consider the following SpecialStack 16 –> TOP 15 29 19 18 When getMin () is called it should return 15, which is the minimum element in the current stack. If we do pop two times on stack, the stack becomes 29 –> TOP 19 18 When getMin () is called, it should return 18 which is the minimum in the current stack.
How to get Min element from the stack?
You are required to complete the three methods push () which take one argument an integer ‘x’ to be pushed into the stack, pop () which returns a integer poped out from the stack and getMin () which returns the min element from the stack. (-1 will be returned if for pop () and getMin () the stack is empty.)
Which is the best way to implement specialstack?
To implement SpecialStack, you should only use standard Stack data structure and no other data structure like arrays, list, .. etc. Consider the following SpecialStack 16 –> TOP 15 29 19 18 When getMin () is called it should return 15, which is the minimum element in the current stack.
How to remove a number from a stack?
Initially the minimum element minEle in the stack is -1. Number removed: -3, Since -3 is less than the minimum element the original number being removed is minEle which is -1, and the new minEle = 2*-1 – (-3) = 1 Number removed: 1, 1 == minEle, so number removed is 1 and minEle is still equal to 1.