package stack;
import java.util.Stack;
/**
* Created by gouthamvidyapradhan on 08/03/2017.
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.
push(x) -- Push element x onto stack.
pop() -- Removes the element on top of the stack.
top() -- Get the top element.
getMin() -- Retrieve the minimum element in the stack.
Example:
MinStack minStack = new MinStack();
minStack.push(-2);
minStack.push(0);
minStack.push(-3);
minStack.getMin(); --> Returns -3.
minStack.pop();
minStack.top(); --> Returns 0.
minStack.getMin(); --> Returns -2.
*/
public class MinStack
{
class Node
{
int value, min;
Node(int value, int min)
{
this.value = value;
this.min = min;
}
}
private Stack