Topic: stack-problem / Level: beginner

• 101. Write a function to push elements from an array into a stack and pop elements until the stack is empty.
• 102. Create a stack-based program to find the largest rectangle in a histogram.
• 103. Write a program to push elements from a stack into an array and print the reversed array.
• 104. Implement a function to push numbers into a stack and find the greatest common divisor (GCD) of all elements.
• 105. Write a function to delete all elements less than a given value from a stack.
• 106. Create a program to push all odd numbers from an array into a stack and count them.
• 107. Write a program to convert a binary number to decimal using a stack.
• 108. Implement a function to push the characters of a string into a stack and check if the string is a palindrome.
• 109. Write a program to push elements into a stack and print them in ascending order.
• 110. Create a function to pop all elements from a stack and return the sum of even elements.
• 111. Write a program to reverse every second element in a stack.
• 112. Implement a function to push elements into a stack and pop elements if they are divisible by a given value.
• 113. Write a program to push elements into a stack and pop elements in pairs.
• 114. Create a function to push the elements of an array into two stacks, separating even and odd numbers.
• 115. Write a function to push elements into a stack and find the mode (most frequent element).
• 116. Implement a function to remove all even elements from a stack.
• 117. Write a program to convert a postfix expression to a prefix expression using a stack.
• 118. Create a function to push the Fibonacci series into a stack up to n terms.
• 119. Write a program to remove all elements divisible by 5 from a stack.
• 120. Implement a function to find the product of all elements in a stack.
• 121. Write a program to push elements into a stack and remove the elements with prime indices.
• 122. Create a function to find the nth element from the top of a stack.
• 123. Write a program to push all multiples of 3 from an array into a stack.
• 124. Implement a function to push elements into a stack and check if all elements are unique.
• 125. Write a program to reverse every third element in a stack.
• 126. Create a function to push elements into a stack and remove elements greater than the median.
• 127. Write a program to push characters of a string into a stack and remove all vowels.
• 128. Implement a function to push the squares of numbers from an array into a stack.
• 129. Write a program to push elements into a stack and keep only the prime numbers.
• 130. Create a function to push all elements from an array into a stack and count the number of even elements.
• 131. Write a program to push elements into a stack and check if the elements are sorted in descending order.
• 132. Implement a function to push elements into a stack and pop elements until an odd number is encountered.
• 133. Write a program to push elements into a stack and pop elements based on their index (prime indices first).
• 134. Create a function to reverse an infix expression using a stack.
• 135. Write a program to push elements into a stack and pop elements in reverse order.
• 136. Implement a function to push elements into a stack and remove elements less than a given threshold.
• 137. Write a program to push elements into a stack and reverse every pair of elements.
• 138. Create a function to push elements from a matrix into a stack column by column.
• 139. Write a program to push elements into a stack and count how many elements are greater than a specified number.
• 140. Implement a function to check if a stack contains a specific element.
• 141. Write a program to push elements from one stack into another in reverse order.
• 142. Create a function to push elements into a stack and find the maximum element using only one loop.
• 143. Write a program to push elements into a stack and remove the last k elements.
• 144. Implement a function to find the difference between the maximum and minimum elements in a stack.
• 145. Write a program to push the factorial of numbers from 1 to n into a stack.
• 146. Create a function to pop all elements from a stack and print them in pairs.
• 147. Write a program to push elements into a stack and print all the prime elements.
• 148. Implement a function to push elements into a stack and pop the middle element.
• 149. Write a program to push the elements of a string into a stack and remove all consonants.
• 150. Create a function to push elements into a stack and find the average of the elements.

• More Levels

• Intermediate
• Advanced