/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int m[][] = {{1,2},{3,4},{6,7}};
        int linhas = 0;
        int colunas = 0;
 
        if (m.length > 0)
        {
            linhas = m.length;
            colunas = m[0].length;            
        }
 
        System.out.println("Colunas: " + colunas);
        System.out.println("Linhas: " + linhas);
	}
}

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