81. Write a function to find the longest consecutive elements in a stack.
82. Implement a function to check if a stack is empty before performing pop.
83. Write a function to merge two sorted stacks.
84. Implement a function to sort a stack using recursion.
85. Write a function to create a stack of characters and perform operations.
86. Implement a function to find the sum of elements in a stack.
87. Write a function to find the product of elements in a stack.
88. Implement a function to find the average of elements in a stack.
89. Write a function to find the mode of elements in a stack.
90. Implement a function to remove the first element from a stack.
91. Write a function to remove the last element from a stack.
92. Implement a function to display the size of the stack before and after push/pop operations.
93. Write a function to clear a stack and check if it's empty afterward.
94. Implement a function to print all elements of a stack in one line.
95. Write a function to create a stack from a string.
96. Implement a function to find duplicates in a stack.
97. Write a function to find common elements in two stacks.
98. Implement a function to check if the stack is a subset of another set.
99. Write a function to implement a stack with a counter for push/pop operations.
100. Implement a function to get the top N elements from the stack.
101. Write a function to find the Nth largest element in a stack.
102. Implement a function to shuffle the elements of a stack.
103. Write a function to display the stack's contents as a list.
104. Implement a function to create a stack of floats and perform operations.
105. Write a function to perform arithmetic operations on elements of a stack.
106. Implement a function to find elements that appear more than once in a stack.
107. Write a function to display the first and last elements of the stack.
108. Implement a function to swap the top three elements of a stack.
109. Write a function to check if all elements in the stack are unique.
110. Implement a function to get the index of a specific element in the stack.
111. Write a function to duplicate the top element of the stack.
112. Implement a function to check if the stack is full before pushing.
113. Write a function to get the average of the stack elements.
114. Implement a function to perform binary search on a stack.
115. Write a function to check if a stack contains a specific sequence.
116. Implement a function to push elements to the stack from a list.
117. Write a function to create a stack of strings and perform operations.
118. Implement a function to get the Nth element from the bottom of the stack.
119. Write a function to display elements of the stack in reverse order.
120. Implement a function to implement a stack that tracks push/pop operations.