task_dimentions.kt

    fun boxesList(nummm : Int): List<Box> {
            var intRange = nummm * nummm
            val list = (1..intRange).mapIndexed { index, i ->
                Box(
                    index / nummm,
                    index % nummm,
                    false
                )
            }
            return list
        }



        val magiccc = 15
        val boxesList = boxesList(magiccc)
        adapter = BoxAdapter(onClick = {clicked->
            for (box in boxesList) {

                val sameX = box.row == clicked.row
                val sameY = box.col == clicked.col
                val sameCrossX = box.row - box.col == clicked.row - clicked.col
                val samCrossY = box.row + box.col == clicked.row + clicked.col

                box.isBlink = sameCrossX || samCrossY || sameX || sameY
            }
            adapter.notifyDataSetChanged()
        })

  binding.rv.layoutManager = GridLayoutManager(this, magiccc)
        adapter.count = magiccc
        binding.rv.adapter = adapter
        adapter.submitList(boxesList)


import android.annotation.SuppressLint
import android.graphics.Color
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import com.example.driveapp.Box
import com.example.driveapp.databinding.ItemBoxBinding

class BoxAdapter(
    private val onClick: (Box) -> Unit
) : ListAdapter<Box, BoxAdapter.CloudFolderViewHolder>(DiffCallBack()) {

    var count = 5

    override fun onCreateViewHolder(
        parent: ViewGroup,
        viewType: Int,
    ): CloudFolderViewHolder {
        val itemBinding = ItemBoxBinding.inflate(
            LayoutInflater.from(
                parent.context
            ), parent, false
        )
        val value = parent.context.resources.displayMetrics.widthPixels / count
        val layoutParams = itemBinding.root.layoutParams
        layoutParams.height = value
        layoutParams.width = value
        itemBinding.root.layoutParams = layoutParams
        return CloudFolderViewHolder(itemBinding)
    }

    override fun onBindViewHolder(holderPaging: CloudFolderViewHolder, position: Int) {
        val currentItem = getItem(position)
        if (currentItem != null)
            holderPaging.bind(currentItem)
    }

    inner class CloudFolderViewHolder(private val itemBinding: ItemBoxBinding) :
        RecyclerView.ViewHolder(itemBinding.root) {

        init {
            itemBinding.root.setOnClickListener {
                val position = bindingAdapterPosition
                if (position != RecyclerView.NO_POSITION) {
                    val item = getItem(position)
                    onClick(item)
                }
            }
        }

        @SuppressLint("SetTextI18n")
        fun bind(item: Box) {
            itemBinding.imv.setBackgroundColor(if (item.isBlink) {
                Color.BLUE
            }else Color.YELLOW)
        }
    }

    class DiffCallBack : DiffUtil.ItemCallback<Box>() {
        override fun areItemsTheSame(
            oldItem: Box,
            newItem: Box,
        ): Boolean =
            oldItem.toString().hashCode() == newItem.col.toString().hashCode()

        @SuppressLint("DiffUtilEquals")
        override fun areContentsTheSame(
            oldItem: Box,
            newItem: Box,
        ): Boolean =
            oldItem == newItem
    }
}

n * n dimen