# Phone interview: \n\nAssuming there must be a buy and a sell, return the index of the buying price and index of the selling price with maximum profit and minimum loss. \n\nAlso build your own test cases.\n\n```\nimport math\nprices = [100, 90, 95, 100, 110]\n\ndef get_max_profit(prices):\n  buy_p = prices[0]\n  sell_p = prices[1]\n  profit = buy_p - sell_p\n  buy, sell = 0, 1\n  buy_in = 0\n\n  for i in range(1, len(prices)):\n    if prices[i] < buy_p:\n      buy_p = prices[i]\n      buy = i\n    elif prices[i] - buy_p > profit:\n      profit = prices[i] - buy_p\n      sell = i\n      buy_in = buy\n  \n  return [buy_in, sell]\n \nprint(get_max_profit(prices))\n```

Phone interview: \n\nAssuming there must be a buy and a sell, return the index of the buying price and index of the selling price with maximum profit and minimu