121. Best Time to Buy and Sell Stock.ipynb

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   "source": [
    "def maxProfit(prices):\n",
    "    if len(prices)<=0: return 0\n",
    "    elif prices.index(max(prices)) > prices.index(min(prices)):\n",
    "            return max(prices) - min(prices)\n",
    "    else:\n",
    "        result = 0\n",
    "        min_value = float('inf')\n",
    "        for i in range(len(prices)):\n",
    "            if prices[i]<min_value:\n",
    "                min_value = prices[i]\n",
    "            elif prices[i]-min_value> result:\n",
    "                result = prices[i]-min_value\n",
    "        return result\n",
    "\n",
    "s1 = [2,4,1]\n",
    "s2 = [7,1,5,3,6,4,10]\n",
    "s3 = [7,6,4,3,1,35,6,7,4,2,67,32,67]\n",
    "maxProfit(s2)"
   ]
  }
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