euler-016-power-digit-sum-20130730.ipynb

{
 "metadata": {
  "name": "euler-016-power-digit-sum-20130730"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "2<sup>15</sup> = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.  \n",
      "\n",
      "What is the sum of the digits of the number 2<sup>1000</sup>?"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%timeit sum((int(c) for c in str(2 ** 1000)))\n",
      "sum((int(c) for c in str(2 ** 1000)))"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1000 loops, best of 3: 295 us per loop\n"
       ]
      },
      {
       "output_type": "pyout",
       "prompt_number": 1,
       "text": [
        "1366"
       ]
      }
     ],
     "prompt_number": 1
    }
   ],
   "metadata": {}
  }
 ]
}