{
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   "cell_type": "code",
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    {
     "name": "stdout",
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     "text": [
      "[10, 20, 30, 50, 60, 40, 80]\n"
     ]
    }
   ],
   "source": [
    "# Write a Python program to remove duplicates from a list.\n",
    "# Input a = [10,20,30,20,10,50,60,40,80,50,40]\n",
    "# Output [10, 20, 30, 50, 60, 40, 80]\n",
    "\n",
    "a = [10,20,30,20,10,50,60,40,80,50,40]\n",
    "\n",
    "dup_items = set()\n",
    "uniq_items = []\n",
    "for x in a:\n",
    "    if x not in dup_items:\n",
    "        uniq_items.append(x)\n",
    "        dup_items.add(x)\n",
    "\n",
    "print(uniq_items)"
   ]
  }
 ],
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