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    "https://leetcode.com/problems/search-a-2d-matrix\n",
    "\n",
    "\n",
    "Runtime: 44 ms, faster than 64.91% of Python3 online submissions for Search a 2D Matrix.\n",
    "Memory Usage: 14.7 MB, less than 84.80% of Python3 online submissions for Search a 2D Matrix.\n",
    "\n",
    "\n",
    "```python\n",
    "class Solution:\n",
    "    def searchMatrix(self, matrix: List[List[int]], target: int) -> bool:\n",
    "        #6:40\n",
    "        first_column = list(zip(*matrix))[0]\n",
    "        for index, num in enumerate(first_column):\n",
    "            if index+1 < len(first_column):\n",
    "                if (target>=num and target<first_column[index+1] and index <len(first_column)):\n",
    "                    if target in matrix[index]:\n",
    "                        return True\n",
    "                    else:\n",
    "                        return False\n",
    "            else:\n",
    "                if target in matrix[-1]:\n",
    "                    return True\n",
    "                else:\n",
    "                    return False\n",
    "       #6:49\n",
    "```"
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