Topic: array-problem / Level: beginner

• 801. Check if the product of all elements in a 2D matrix is divisible by the sum of the number of rows and columns.
• 802. Find the longest contiguous subarray where the sum of elements is a multiple of both 5 and 7.
• 803. Find the longest contiguous subarray where the product of elements is a multiple of both 6 and 8.
• 804. Check if the sum of elements at prime indices in an array is a multiple of the sum of their indices.
• 805. Check if the product of elements at composite indices in an array is a multiple of the product of their indices.
• 806. Find the number of subarrays where the sum of elements is greater than their digit sum.
• 807. Find the number of subarrays where the product of elements is smaller than their digit product.
• 808. Check if the sum of the first n elements in an array is greater than the sum of the last n elements.
• 809. Check if the product of the first n elements in an array is smaller than the product of the last n elements.
• 810. Find the longest contiguous subarray where the sum of elements is smaller than the sum of their squares.
• 811. Find the longest contiguous subarray where the product of elements is greater than the product of their cubes.
• 812. Check if the sum of elements in an array is divisible by their digit sum.
• 813. Check if the product of elements in an array is divisible by their digit product.
• 814. Find the row in a 2D matrix where the sum of elements is smaller than the sum of all other rows.
• 815. Find the column in a 2D matrix where the product of elements is greater than the product of all other columns.
• 816. Check if the sum of all boundary elements in a 2D matrix is divisible by their index sum.
• 817. Check if the product of all boundary elements in a 2D matrix is divisible by their index product.
• 818. Find the number of subarrays where the sum of elements is smaller than the cube of their digit sum.
• 819. Find the number of subarrays where the product of elements is greater than the square of their digit product.
• 820. Check if the sum of the diagonal elements in a square 2D matrix is divisible by the sum of the boundary elements.
• 821. Check if the product of the diagonal elements in a square 2D matrix is smaller than the product of the boundary elements.
• 822. Find the longest contiguous subarray where the sum of elements is divisible by both their index and their digit sum.
• 823. Find the longest contiguous subarray where the product of elements is divisible by both their index and their digit product.
• 824. Check if the sum of the elements in the first row of a 2D matrix is greater than the sum of the last row.
• 825. Check if the product of the elements in the first column of a 2D matrix is smaller than the product of the last column.
• 826. Find the longest contiguous subarray where the sum of elements is a perfect square.
• 827. Find the longest contiguous subarray where the product of elements is a perfect cube.
• 828. Check if all elements in an array are divisible by both their index and their digit sum.
• 829. Check if all elements in an array are divisible by both their index and their digit product.
• 830. Find the row in a 2D matrix where the sum of elements is a multiple of both the number of rows and columns.
• 831. Find the column in a 2D matrix where the product of elements is a multiple of both the number of rows and columns.
• 832. Check if the sum of elements in a square 2D matrix is a perfect square.
• 833. Check if the product of elements in a square 2D matrix is a perfect cube.
• 834. Find the number of subarrays where the sum of elements is smaller than their digit sum.
• 835. Find the number of subarrays where the product of elements is smaller than their digit product.
• 836. Check if the sum of diagonal elements in a square 2D matrix is greater than the product of the other elements.
• 837. Check if the product of diagonal elements in a square 2D matrix is smaller than the sum of the other elements.
• 838. Find the longest contiguous subarray where the sum of elements is a multiple of both 2 and 3.
• 839. Find the longest contiguous subarray where the product of elements is a multiple of both 4 and 6.
• 840. Check if all elements in an array are greater than or equal to the sum of their digit sum.
• 841. Check if all elements in an array are divisible by both the sum of their digit sum and digit product.
• 842. Find the longest contiguous subarray where the sum of elements is smaller than the sum of their index sum.
• 843. Find the longest contiguous subarray where the product of elements is greater than the product of their index product.
• 844. Check if the sum of all boundary elements in a square 2D matrix is divisible by their index sum.
• 845. Check if the product of all boundary elements in a square 2D matrix is divisible by their index product.
• 846. Find the number of subarrays where the sum of elements is greater than the product of their digit sum.
• 847. Find the number of subarrays where the product of elements is smaller than the sum of their digit product.
• 848. Check if the sum of diagonal elements in a square 2D matrix is a multiple of both the number of rows and columns.
• 849. Check if the product of diagonal elements in a square 2D matrix is a multiple of both the number of rows and columns.
• 850. Find the longest contiguous subarray where the sum of elements is greater than the product of their squares.

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