More Problems

• Find the element that appears exactly twice in an array.
• Check if an array contains any negative numbers.
• Find the sum of the absolute values of all elements in an array.
• Replace all elements greater than a given value x with x in an array.
• Find the sum of elements at the corners of a 2D matrix.
• Check if a given matrix is a unit matrix (all diagonal elements are 1 and all off-diagonal elements are 0).
• Find the sum of each row in a 2D array.
• Find the product of the diagonal elements of a 2D matrix.