PROGRAMMING:domestic premises
Given each person's family members and their own real estate, please count the population, per capita real estate area and the number of real estate units of each family.
###Input format:
Enter the first line to give a positive integer $$n $$($$Le 1000 $$), followed by $$n $$lines, each of which gives a person's property in the following format:
```
No. parents K children 1... Children K total area of real estate
```
The number is a unique 4-digit number for each person` Father and mother are the number of the person's parents corresponding to the number (if they have passed away, '- 1' will be displayed)` K '($$0 / Le $$$k' $$Le 5 $$) is the number of the person's children` Child I 'is the number of the child.
###Output format:
First, output the number of families in the first line (all related people belong to the same family). Then output the information of each family in the following format:
```
Minimum number of family members family population per capita housing units per capita housing area
```
The per capita value is required to keep 3 decimal places. Firstly, the family information is output in descending order of per capita area, and if there are parallels, it is output in ascending order of member number.
###Input example:
```in
ten
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
```
###Output example:
```out
three
8888 1 1.000 1000.000
0001 15 0.600 100.000
5551 4 0.750 100.000
```
answer：If there is no answer, please comment
###Input format:
Enter the first line to give a positive integer $$n $$($$Le 1000 $$), followed by $$n $$lines, each of which gives a person's property in the following format:
```
No. parents K children 1... Children K total area of real estate
```
The number is a unique 4-digit number for each person` Father and mother are the number of the person's parents corresponding to the number (if they have passed away, '- 1' will be displayed)` K '($$0 / Le $$$k' $$Le 5 $$) is the number of the person's children` Child I 'is the number of the child.
###Output format:
First, output the number of families in the first line (all related people belong to the same family). Then output the information of each family in the following format:
```
Minimum number of family members family population per capita housing units per capita housing area
```
The per capita value is required to keep 3 decimal places. Firstly, the family information is output in descending order of per capita area, and if there are parallels, it is output in ascending order of member number.
###Input example:
```in
ten
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
```
###Output example:
```out
three
8888 1 1.000 1000.000
0001 15 0.600 100.000
5551 4 0.750 100.000
```
answer：If there is no answer, please comment