More Problems

• Write a program to check if a number is a Harshad number.
• Implement a function to calculate the number of unique paths in a grid.
• Create a program to compute the harmonic series up to n.
• Write a program to find the maximum product of three integers in an array.
• Implement a function to check if a string is a valid binary search tree representation.
• Create a program to calculate the sum of the first n cubes.
• Write a program to check if a number is a Kaprekar number.
• Implement a function to find the sum of all numbers in a list.