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   "source": [
    "https://leetcode.com/problems/day-of-the-year\n",
    "\n",
    "\n",
    "Runtime: 0 ms, faster than 100.00% of C++ online submissions for Day of the Year.\n",
    "Memory Usage: 6.4 MB, less than 14.56% of C++ online submissions for Day of the Year.\n",
    "\n",
    "\n",
    "\n",
    "```cpp\n",
    "#include <iostream>\n",
    "#include <ctime>\n",
    "\n",
    "using namespace std;\n",
    "\n",
    "class Solution\n",
    "{\n",
    "public:\n",
    "    time_t parseTimeString(string date)\n",
    "    {\n",
    "        const char *dateString = date.c_str();\n",
    "        struct tm timeinfo;\n",
    "        int year, month, day;\n",
    "        if (sscanf(dateString, \"%d-%d-%d\", &year, &month, &day) != EOF)\n",
    "        {\n",
    "            time_t rawtime;\n",
    "            time(&rawtime);\n",
    "            timeinfo = *localtime(&rawtime);\n",
    "            timeinfo.tm_year = year - 1900;\n",
    "            timeinfo.tm_mon = month - 1;\n",
    "            timeinfo.tm_mday = day;\n",
    "        }\n",
    "        return mktime(&timeinfo);\n",
    "    }\n",
    "\n",
    "    time_t parseTimeStringAndGetTheStartingDay(string date)\n",
    "    {\n",
    "        const char *dateString = date.c_str();\n",
    "        struct tm timeinfo;\n",
    "        int year, month, day;\n",
    "        if (sscanf(dateString, \"%d-%d-%d\", &year, &month, &day) != EOF)\n",
    "        {\n",
    "            time_t rawtime;\n",
    "            time(&rawtime);\n",
    "            timeinfo = *localtime(&rawtime);\n",
    "            timeinfo.tm_year = year - 1900;\n",
    "            timeinfo.tm_mon = 0;\n",
    "            timeinfo.tm_mday = 1;\n",
    "            timeinfo.tm_hour = 0;\n",
    "            timeinfo.tm_min = 0;\n",
    "            timeinfo.tm_sec = 0;\n",
    "        }\n",
    "        return mktime(&timeinfo);\n",
    "    }\n",
    "    int dayOfYear(string date)\n",
    "    {\n",
    "        //https://www.cplusplus.com/reference/ctime/mktime/\n",
    "        //https://www.cplusplus.com/reference/ctime/\n",
    "        auto time1 = this->parseTimeString(date);\n",
    "        auto time2 = this->parseTimeStringAndGetTheStartingDay(date);\n",
    "        auto seconds = difftime(time1, time2);\n",
    "        return seconds / 60 / 60 / 24 + 1;\n",
    "    }\n",
    "};\n",
    "```"
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   "source": [
    "int main(int argc, char *argv[])\n",
    "{\n",
    "    auto s = Solution();\n",
    "    auto r = s.dayOfYear(\"2019-02-10\");\n",
    "    cout << \"result: \" << r << endl;\n",
    "    return 0;\n",
    "}"
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