268. Missing Number.ipynb

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      "0\n"
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   "source": [
    "def missingNumber(nums):\n",
    "    if len(nums) <2 and nums[0] == 1: return 0\n",
    "    total = [i for i in range(0, max(nums)+1, 1)]\n",
    "    if set(total)==set(nums):\n",
    "        return max(nums)+1\n",
    "    return list(set(total).difference(nums))[0]\n",
    "nums = [1,2,3,4,5,7]\n",
    "nums2 = [1,2,3,4,5,6,7]\n",
    "nums3 = [1]\n",
    "print(missingNumber(nums3))\n"
   ]
  }
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