using System;
public class Program
{
private static double CalculateNormal(int[][] matrix) {
int normal = 0;
for (int i = 0; i < matrix.Length; i++) {
for (int j = 0; j < matrix.Length; j++) {
normal += matrix[i][j] * matrix[i][j];
}
}
return Math.Sqrt(normal);
}
private static int CalculateTrace(int[][] matrix) {
int trace = 0;
for (int i = 0; i < matrix.Length; i++) {
trace += matrix[i][i];
}
return trace;
}
public static void Main(string[] args)
{
int[][] matrix = new int[][]
{
new int[] {1, 1, 1, 1, 1},
new int[] {2, 2, 2, 2, 2},
new int[] {3, 3, 3, 3, 3},
new int[] {4, 4, 4, 4, 4},
new int[] {5, 5, 5, 5, 5}
};
Console.WriteLine(CalculateTrace(matrix));
Console.WriteLine(CalculateNormal(matrix));
}
}
/*
run:
15
16.583123951777
*/
