function  FindElem( mat, elem,  M,  N)
        {
            var row = 0;
            var col = N - 1;
            var cont = 0;
            while (row < M && col >= 0)
            {
                if (mat[row][col] == elem)
                {
                    cont++;
                    //return true;
                }
                if (mat[row][col] > elem)
                {
                    col--;
                }
                else
                {
                    row++;
                }
            }
            return cont;
        }

function countNumber(arr,num){
  //coding and coding..
  return FindElem( arr, num, arr.length, arr[0].length);

}