More Problems

• Implement a function to count the number of digits in a string representation of a number.
• Create a program to calculate the factorial of a number using a stack.
• Write a program to check if a number is a Peterson number.
• Implement a function to find the harmonic mean of a set of numbers.
• Create a program to find the number of combinations of n items taken k at a time.
• Write a program to compute the value of pi using the Monte Carlo method.
• Implement a function to determine if a string is a valid Roman numeral.
• Create a program to find the number of unique paths in a grid.