More Problems

• Count how many columns contain positive numbers in a 2D array.
• Check if a given 2D matrix is sparse (more than half of its elements are zero).
• Find the maximum element in each diagonal of a 2D array.
• Find the sum of the boundary elements of a 2D matrix.
• Check if an array is monotonic (either entirely non-increasing or non-decreasing).
• Count the number of prime numbers in an array.
• Find the greatest common divisor (GCD) of all elements in an array.
• Find the least common multiple (LCM) of all elements in an array.