1418_displayTable.txt

class Solution {
public:
    vector<vector<string>> displayTable(vector<vector<string>>& orders) {
        set<string> foodname;//存放菜品名
        map<int,map<string,int>> mp;//存放桌号以及对应的菜品名及数量
        for(auto& order:orders){
            foodname.insert(order[2]);
            mp[stoi(order[1])][order[2]]++;
        }
        vector<vector<string>> res;
        vector<string> title = {"Table"};
        for(auto& food:foodname)
            title.push_back(food);
        res.push_back(title);
        for(auto& p:mp){
            vector<string> str = {to_string(p.first)};
            for(auto& food:foodname){
                str.push_back(to_string(p.second[food]));
            }
            res.push_back(str);
        }
        return res;
    }
};