Project Euler Q6 - LO Man Hei

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   "source": [
    "### Q6\n",
    "Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum."
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    "def sum_of_square_first_n(n):\n",
    "    return (n)*(n+1)*(2*n+1)//6\n",
    "\n",
    "def square_of_sum_first_n(n):\n",
    "    return ((1+n)*n//2)**2"
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      "CPU times: user 3 µs, sys: 1 µs, total: 4 µs\n",
      "Wall time: 4.53 µs\n"
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   "source": [
    "%%time\n",
    "square_of_sum_first_n(100)-sum_of_square_first_n(100)"
   ]
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