test24.txt

t24.py
===
5
5 10 15
2 10 15
5 5 5
20 20 1
20 1 1
---
12
===
1
1 1 1
---
1
===
2
2 2 2
1 1 1
---
2
===
3
1 2 3
2 3 4
3 4 5
---
3