using System;
public class Program
{
public static void Main()
int[, ] matrix =
12,
23,
45,
67
},
78,
56,
89,
90
34,
65,
77,
29
19,
31,
73,
81
}
};
int maxValue = int.MinValue;
for (int i = 0; i < matrix.GetLength(0); i++)
for (int j = 0; j < matrix.GetLength(1); j++)
if (matrix[i, j] > maxValue)
maxValue = matrix[i, j];
Console.WriteLine("Maximum value: " + maxValue);
