leetcode-1418-点菜展示表

class Solution:
    def displayTable(self, orders: List[List[str]]) -> List[List[str]]:
        table = set()
        table_l = []
        food = set()
        food_l = []
        for order in orders:
            if order[1] not in table:
                table.add(order[1])
                table_l.append(order[1])
            if order[2] not in food:
                food.add(order[2])
                food_l.append(order[2])
        table_l.sort(key=lambda x:int(x) )
        food_l.sort()
        m,n = len(table_l)+1,len(food_l)+1
        res = [["0"] * n for _ in range(m)]
        res[0] = ["Table"] + food_l
        for i in range(len(table_l)):
            res[i + 1][0] = table_l[i]
        dic_food = {}
        dic_table = {}
        for i,v in enumerate (food_l):
            dic_food[v] = i + 1
        for i,v in enumerate (table_l):
            dic_table[v] = i + 1
        # print(dic_food)
        # print(res)
        for order in orders:
            res[dic_table[order[1]]][dic_food[order[2]]] = str(int(res[dic_table[order[1]]][dic_food[order[2]]]) + 1)
        return res

class Solution:
    def displayTable(self, orders: List[List[str]]) -> List[List[str]]:
        fs = set()
        ts = collections.defaultdict(lambda :collections.defaultdict(int))
        
        for _, t, f in orders:
            fs.add(f)
            ts[int(t)][f] += 1
        
        res = []
        res.append([‘Table‘])
        
        for f in sorted(list(fs)):
            res[0].append(f)
        
        for t in sorted(list(ts.keys())):
            res.append([str(t)])
            for i in range(1, len(res[0])):
                res[-1].append(str(ts[t][res[0][i]]))
        return res