发布时间：2023-06-09 13:30
This time, you are supposed to help us collect the data for family-owned property. Given each person\'s family members, and the estate（房产）info under his/her own name, we need to know the size of each family, and the average area and number of sets of their real estate.
Input Specification:
Each input file contains one test case. For each case, the first line gives a positive integer N (≤1000). Then N lines follow, each gives the infomation of a person who owns estate in the format:
ID Father Mother k Child
1
…Child
k
M
estate
Area
where ID is a unique 4-digit identification number for each person; Father and Mother are the ID\'s of this person\'s parents (if a parent has passed away, -1 will be given instead); k (0≤k≤5) is the number of children of this person; Child
i
\'s are the ID\'s of his/her children; M
estate
is the total number of sets of the real estate under his/her name; and Area is the total area of his/her estate.
Output Specification:
For each case, first print in a line the number of families (all the people that are related directly or indirectly are considered in the same family). Then output the family info in the format:
ID M AVG
sets
AVG
area
where ID is the smallest ID in the family; M is the total number of family members; AVG
sets
is the average number of sets of their real estate; and AVG
area
is the average area. The average numbers must be accurate up to 3 decimal places. The families must be given in descending order of their average areas, and in ascending order of the ID\'s if there is a tie.
Sample Input:
10
6666 5551 5552 1 7777 1 100
1234 5678 9012 1 0002 2 300
8888 -1 -1 0 1 1000
2468 0001 0004 1 2222 1 500
7777 6666 -1 0 2 300
3721 -1 -1 1 2333 2 150
9012 -1 -1 3 1236 1235 1234 1 100
1235 5678 9012 0 1 50
2222 1236 2468 2 6661 6662 1 300
2333 -1 3721 3 6661 6662 6663 1 100
Sample Output:
3
8888 1 1.000 1000.000
0001 15 0.600 100.000
5551 4 0.750 100.000
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