Introduction - If you have any usage issues, please Google them yourself
Describe the elements to a diagonal matrix equal to the corresponding axis of symmetry. Compressed using a special matrix storage. That the use of one-dimensional array containing the lower triangular matrix elements. Enter the first line of the input matrix of order n the second row by row sequence alignment of all the lower triangular matrix elements. (Separated by a space) (for example, the input matrix shown above order: 150,189,302,570,613) The third act positive integers i and j (0 < i, j < = n)