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    "https://leetcode.com/problems/custom-sort-string\n",
    "\n",
    "\n",
    "Runtime: 0 ms, faster than 100.00% of C++ online submissions for Custom Sort String.\n",
    "Memory Usage: 6.2 MB, less than 87.06% of C++ online submissions for Custom Sort String.\n",
    "\n",
    "\n",
    "```cpp\n",
    "#include <vector>\n",
    "#include <algorithm>\n",
    "#include <iostream>\n",
    "#include <map>\n",
    "\n",
    "using namespace std;\n",
    "\n",
    "class Solution\n",
    "{\n",
    "public:\n",
    "    string customSortString(string S, string T)\n",
    "    {\n",
    "        //6:34\n",
    "        map<char, int> d;\n",
    "        for (int i = 0; i < T.size(); i++)\n",
    "        {\n",
    "            char c = T[i];\n",
    "            if (d.find(c) != d.end())\n",
    "            {\n",
    "                d[c] += 1;\n",
    "            }\n",
    "            else\n",
    "            {\n",
    "                d[c] = 1;\n",
    "            }\n",
    "        }\n",
    "        string r = \"\";\n",
    "        for (int i = 0; i < S.size(); i++)\n",
    "        {\n",
    "            char c = S[i];\n",
    "            if (d.find(c) != d.end())\n",
    "            {\n",
    "                for (int j = 0; j < d[c]; j++)\n",
    "                {\n",
    "                    r += c;\n",
    "                }\n",
    "                d.erase(d.find(c));\n",
    "            }\n",
    "        }\n",
    "\n",
    "        for (auto const &x : d)\n",
    "        {\n",
    "\n",
    "            for (int j = 0; j < x.second; j++)\n",
    "            {\n",
    "                r += x.first;\n",
    "            }\n",
    "        }\n",
    "\n",
    "        return r;\n",
    "        //6:44\n",
    "    }\n",
    "};\n",
    "```"
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